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> Yearly Return 2005 AWS Burncross Sheffield UK
ole blue eyes
post Jan 9 2006, 03:42 AM
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Yearly Return 2005

Sheffield Burncross AWS

Period of averages (2000-2005)

Time of morning observation 09:00 GMT


Temperature

Mean Maximum 14.2c
Diff from local average + 1.1c

Mean Minimum 7.6c
Diff from local average +1.5c

Mean 10.9c
Diff from local average +1.4c

High Maximum 29.9c July 12th

Low Maximum 1.5c December 28th

High Minimum 19.5c July 13th

Low Minimum -3.2c December 29th

Grass Minimum -8.0 December 29th


Rainfall

Rain Total 682 mm

82% of Local Average

Rain days

Wet days 140

Most in a Day 34 mm July 28th

RAIN other days over 50mm: NONE


Number of days with: air frost 12 days

Ground frost 39 days

Sleet/snow falling (in the UK from 0000-2400 GMT) 17 Days

50% snow cover at morning observation hour 8 days

Thunder heard (in the UK from 0000-2400 GMT) 5 days

Small hail < 5mm diameter 4 days

Large hail >=5mm diameter None

Fog at morning observation hour 15 days


SUNSHINE

Total sunshine 1236.21 hours
% of average Not Know
Most in a day 16.30 hours June 23rd
Sunless days 66


WIND DATA

Days with gale (10min mean wind 39mph/34kts or more) 1 day

Number of days with wind from

North 39 days

North East 32 days

East 20 days

South East 66 days

South 32 days

South West 37 days

West 48 days

North West 60 days

Calm 48 days

Mean wind speed 4.94 mph

Maximum Gust 42.33 mph January 19th

Cloud Cover 66%

Mean Relative Humidity at morning observation 73%

Mean pressure (mb) at 0900 GMT ONLY 1015mb

Pressure anomaly for year (mb)

Maximum pressure at any time of day 1038mb November 22nd and 23rd

Minimum pressure at any time of day 972mb April 18th



STATION NOTES


Monthly Weather Highlights

January

January 2005 was a notable month for the mildness, the wind and the lack of rain. The month was the one the warmest since 1990 with an average of 6.11c while the rainfall was 61 mm. The main talking point was the wind and the lack of notable snow.

The mean maximum temperature was 8.56c, which was the warmest for 15 years with 1990 showing a reading of 9.8c. The mean minimum was the highest since 1983 these two combined gave a mean of + 2.41c.

The wind reached speeds over 30 mph on six times during the month considering my station is situated in a lee of the hills this is high a maximum of 42.3 mph was recorded on the 19th.

February

There were a total of 11 days on which snow fell during the month howbeit some was only flurries. Overnight on Tuesday the 22nd 1.5 cm of snow fell and during the day it melted. The notable snow event on the higher ground where I live commenced at 22.00 hours approximately on the 22nd and lasted until 16.30 hours on the 23rd giving a total of 15 cms. The local roads were blocked on the higher ground during the day.

On 21st Ice Pellets fell and throughout the month on three occasions small hail fell.

March

March 2005 was a month which started with a cold spell which lasted until the 9th then the temperatures picked up and as a consequence the month was 1.75 c above the mean with the mean minimum being 2.5c above the mean making it the second warmest March mean minimum for the past 50 years according to the local records with 1961 slightly warmer with 5.5c.

April

April 2005 was an average month with temperatures 1 degree centigrade above the average. The rainfall again was 125% of the normal with 82 mm recorded within the month with 16 mm recorded on the 15th. There were no high winds either to speak of but 10.94 hours of sunshine was recorded on the 29th indicating the lengthening days.

May

May 2005 was an average month with average temperatures throughout the month. There was no notable hot spell although 20c was recorded on the 27th. The rainfall again was below average with only 36 mm recorded, which is 63% of the average for May. There was a storm on the 2nd and otherwise apart from a mean wind speed of 6.65 mph the winds were always in the cold sector of the compass 7 days Northerly, 4 days North Easterly, 4 Easterly and 7 South Easterly

June

June 2005 was a month with slightly above average temperatures throughout the month. There were two hot spells, the first was from the 18th to the 20th and that was punctuated by a storm on the 19th. The second spell was the 26th to the 28th and this also ended with a storm on the 28th. The feature of both storms was the lack of rain in the first storm no rain fell and in the second only 8 mm fell. The rainfall again was below average with only 34 mm recorded, which is 63% of the average for June.

The long days produced 3 notable days of sunshine in the hot spell the 26th produced 14.23 hours, the 27th 15.99 hours and the 28th 13.04 hours and the day after the storm on the 29th was sunless.

July

July 2005 saw plenty of cool dull weather mixed with hot sunny weather. Rainfall was absent on 22 days. Despite this heavy rain associated with a weak thunderstorm dumped enough rain on the 27th to bring the months rainfall above average.

August

August 2005 a month with the temperatures slightly above average with the lowest maximum 17.4 c recorded on the 26th. The 17th and 18th were days when the temperature peaked at just over 27.0c but the hottest day was the 31st when in the evening we had a slight thunderstorm.

The month was a dry month yet again with 31 mm of rain falling which is only 44% of the local average a total of 9 wet days were recorded with the 22nd August giving 7 mm in total as the wettest day


September

September 2005 was a month of above average temperatures and above average rainfall. One or two cool nights helped cool the temperatures down slightly without those it would have well over normal. The month started hot before cooling down as the month went on. Rainfall started on the low side but a weak overnight storm heralded the start of a wet month.
Temperatures continued the hot weather from the end of the previous month peaking at 26.7c on the 6th. The mean maximum temperature was +2.5c of the local averages, again the minimum was +3.2 and then the mean temperature was +2.3 above the average.
Therefore there was a new local record set for the mean minimum 12.0c was just 0.3c over the 1999 average.
Rainfall for once came in well above average. It started dry then a weak storm produced 35 mm of rain over two days during the 8th and 9th. Further heavy rain fell on the 15th and 28th, 16 mm and 11 mm respectively

October

A new record mean minimum temperature was set of 10.6c this is .5c warmer than in 2001.

November

It is noted from the 17th onwards that there was a cold spell culminating in a minimum air temperature of –2.3c recorded on the 23rd. Snow was visible on the higher parts of the area.

The rainfall was only 63 mm, which is 79% of the local average, and the month had 91.9 hours of sunshine peaking at 6.88 hours recorded on the 1st of the month

December

December 2005 started on a wet note then quickly dried up, as a weak Atlantic didn’t provide any really vigorous depressions.
Temperatures hit double figures on six days the highest being 12.8c on the 11th and 10.8c on the tenth. The lowest was on the 28th just above freezing at 1.5C. The lowest temperature of the year were recorded on the 29th –3.2c.
Rainfall started out quite well with the highest of 15 mm recorded on the 1st. There was no rain after the 9th until 27th when 1 mm was recorded and this was snow melt. The month was dry with only 29 mm recorded in total, which is just 34% of the local average.
Snowfall was rare again. Occurring on 2 days towards the end of the month and the snow was generally light. Heavy Snow Forecast for the 30th didn’t turn up the milder air moving much quicker than expected.
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ole blue eyes
post Jan 7 2007, 11:39 AM
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Yearly Return 2006

Sheffield Burncross AWS

Period of averages (2000-2006)

Time of morning observation 09:00 GMT


Temperature

Mean Maximum 15.2c
Diff from local average + 2.3c

Mean Minimum 8.5c
Diff from local average +2.5

Mean 11.9c
Diff from local average +2.4c

High Maximum 32.7c 17th July

Low Maximum 0.4c 1st February

High Minimum 21.0c 3rd July

Low Minimum -4.8c 3rd March

Grass Minimum -7.0c 21st and 22nd December


Rainfall

Rain Total 737 mm

89% of Local Average

Rain days

Wet days 168

Most in a Day 31 mm July 2nd

RAIN other days over 50mm: NONE


Number of days with: air frost 17 days

Ground frost 39 days

Sleet/snow falling (in the UK from 0000-2400 GMT) 15 Days

50% snow cover at morning observation hour 3 days

Thunder heard (in the UK from 0000-2400 GMT) 6 days

Small hail < 5mm diameter 5 days

Large hail >=5mm diameter None

Fog at morning observation hour 14 days


SUNSHINE

Total sunshine 1308.96 hours
% of average Not Know
Most in a day 15.81 hours June 3rd and July 3rd
Sunless days 51


WIND DATA

Days with gale (10min mean wind 39mph/34kts or more) 1 day

Number of days with wind from

North 28 days

North East 16 days

East 36 days

South East 72 days

South 28 days

South West 39 days

West 55 days

North West 38 days

Calm 53 days

Mean wind speed 4.9 mph

Maximum Gust 40.3 mph September 14th

Cloud Cover 69%

Mean Relative Humidity at morning observation 68%

Mean pressure (mb) at 0900 GMT ONLY 1014mb

Pressure anomaly for year (mb)

Maximum pressure at any time of day 1045mb December 22nd

Minimum pressure at any time of day 978mb November 23rd



STATION NOTES

We have now established a new mean maximum of 15.2c this is greater than the existing 14.7c recorded in 1999.


Monthly Weather Highlights

January

January 2006 saw static high pressure with a minimum pressure of 1000 mb during the month.

Winds were light throughout the month with a mean wind speed of 3.3 mph and calm conditions reported 10 times during the month at 09Z. During the month the peak wind gust was 25.3 mph.

Temperatures were only slightly above average with a mean of +1.8 c Temperatures hit double figures on 4 days the Highest being 12.3c on the 19th while the lowest maximum occurred on the 5th of 2.7c. There was no air temperature recorded below zero but there was a ground frost on 13 days including 10 consecutive days leading to the month end
Rainfall was only notable by the lack of it during the month. The highest fall a pathetic 4 mm on the 10th. Otherwise it was very dry month with only 10 mm, which is 12% of the average for the month.

February

February 2006 was a month when the temperatures were just above the average.

The first 3 days of the month saw calm winds, mist and low temperatures these recovered with a warm spell from the 12th through to the 19th.

The 21st to the 24th saw a spell with snow and on the 24th the snow was laying on the ground, and falling at 09z when I observed. A further feature was 12 days of ground frost during the month.

The sunshine for the month was low with 54.43 hours recorded during the lengthening days of this month. There were a total of 10 sunless days.

The key feature however was the lack of rainfall during the month with only 42% of the average recorded but for the rain that fell on the 23rd 15mm in total we would have had a spectacularly low figure.
March
March 2006 was a cold month with the temperatures well down on what could be expected for this month. The mean maximum was –1.8c whilst the mean minimum was only –0.1 the mean worked out at 4.9.
If it were not for the run of winds from a southerly quadrant commencing on the 25th the month would have been even colder. We had air frosts on 9 days during the month.
A feature of this month was that we had above average rainfall 81 mm giving us 127% of our average with a total of 21 wet days throughout the month but the maximum recorded on any one day was 11 mm
On the evening of the 3rd a slow moving narrow band of snow brought heavy snow in the evening and I had to go out in the car it was a struggle luckily the trough was dying and the roads cleared within a couple of hours.
April
April 2006 was slightly above average temperature wise with below average rainfall. Winds were dominant from the South West quadrant, with a mean wind speed of 5.4 mph
The month commenced with temperatures on the low side until they began to recover significantly on the 11th. There was only 1 sunless day within the month.
On the 1st and the 3rd snow and sleet showers were observed. On the 8th and the 9th Rain, sleet, Snow, Small Hail and Grupple were the mixture for the day’s showers. Despite this rainfall was only 63% of the average for the month of April; there were 8 consecutive dry days at the month end.
The period 4th to the 10th gave a ground frost on each morning
May
May 2006 saw above average temperatures whist the rainfall came in also above average. The period 3rd to the 6th inclusive saw maximum temperatures of over 20c and again throughout the month towards the middle maximums again were high. There were some cold nights towards the end of the month and ground frost were recorded on both the 22nd and 25th. On the 13th the diurnal range of readings was very narrow a maximum of 10.6c and a minimum of 8.5c
Winds again were from a westerly quadrant and the mean wind speed was 4.6 mph with a maximum gust of 27.5 mph recorded on the 27th
The first 10 days of the month saw 5 mm of rainfall and thereafter 12 consecutive wet days with the last 6 days of the month almost dry. This gave a total of 67 mm that is 115% of the local average

June
June 2006 was the warmest June since 1954 when local records are available and the driest ever on record.
Temperatures were at highest from the 3rd to the 13th. The mean maximum was +4.2c over the average again the mean minimum was +3.1c over the average. The 10th, 11th and 12th were exceptionally hot days.
Rainfall was notable by its absence. A very dry month the highest rainfall being 3.0 mm on the 20th. It was the driest June recorded local since records are available from 1954 onwards.
July
July 2006 was the Hottest July ever recorded, beating 2003, 1995 and 1976. There were several days with high temperatures. There were 16 consecutive days where the maximum temperature was above 25c the 15th through to the 31st
Rainfall was 46mm which was 71% of the local averages with a total of 31mm falling in the downpour on the 2nd during the storm which lasted from 19.30 hours – 21.30 hours. The storm of the 22nd gave another 11mm and apart from a 4mm falling in 3 days there were dry periods.
Temperatures were amazing the month started hot cooled down after the 6th before the next long hot spell started on the 16th and lasted 13 days. The first spell lasted six days despite a Thunderstorm on the 2nd. Temperatures peaked on the first with a notable 30.8c. The coolest spell started a few days later with the lowest maximum temperature being 21.2c on the 8th.
Then the heat started slowly to build on the 16th. The 17th marked three days above 29.8c. The highest temperature was 32.7c on the 17th. A slow cooling down followed this before temperatures rose again peaking at 31.6c on the 26th. Then they fell slowly dropping down to 23.5c on the 31st.
Thunder Storms occurred on two days. An early evening storm on the 2nd which produced 31mm of rain, this was a huge multi cell storm. The storm of the 22nd again was heavy but with less rain and in the late afternoon
August
August 2006 was a change completely from July. The mean temperature was still above the average by 1.4c. This was because the mean minimums were +2.0c
Winds in keeping with a cooler month dominated from the Westerly direction on 19 days during the month. It was never a very windy month with winds peaking at 23.7 mph on both the 2nd and the 9th.
Rainfall was above average 92 mm in total with 17 Wet Days during the month. The highest total was 11 mm which was recorded on the 19th and 21st. There was one weak storm on the 18th with only 9mm of rain recorded.
September

September 2006 was the warmest September on record. In September 1999 the mean maximum was 20.7c but this September saw that record broken with a mean maximum of 21.2c against the average of 17.1c. The mean minimum was 13.4c compared with the average and this combination gave a mean of 17.5c against the average of 13.5c. Despite this the last day of the month saw a grass minimum of 2.0c which indicated that it was after all autumn.
The winds were from the easterly quadrant on 15 days of the month at 09.0z. Rainfall was slightly above average with a fall of 13.0mm on the 22nd of the month.
The event of note was the afternoon of 14th just before 15.00 hours it went very dark and at 15.03 hours mayhem broke loose. The rain poured for a 10 minute period but at 15.03 hours a wind gust of 40.3 mph was recorded and at 15.15 hours it cleared again to blue sky. Further north however in Leeds 28 miles away a tornado was reported all I recorded was the passing of this vigorous front.
October

As I spent part of October in Kenya flying to Nairobi on the 17th it was great to have the station linked to the computer.

The highlight of the month was the fact that a new record was set for the mean maximum which was 10.6c and beats the one set in 2001 of 10.1c

On the 16th of the month the diurnal range of the temperature was most interesting, I recorded a maximum of 12.7c and a minimum of 11.9c with a range of only 0.8c

November

As I spent all November in Kenya it was great to have the station linked to the computer.

The first nine days of the month were dry.

On 21 days during the month at5 09z the wind was from a southerly quadrant.

December
December 2006 was a warm month but did not beat the mean maximum of 10.1c recorded in December 2000. The mean minimum was lower 5.6 than the 6.1c in 2004. The mean was not a record breaker either.
Winds dominated from a southerly quadrant on 18 days on the month. Calm conditions did occur five times as the High settled over the Country.
Temperatures were well above normal. The Highest being 14.0C on the 14th nearly matched by the 5th and the 13th with 13.7c. The coldest day was on the 22nd when -0.2c was recorded this was the only air frost of the month however there was a ground frost on 11 days during the month.
Rainfall was just over the average with a period from the 17th to the 26th when no rain fell when the pressure was high with a maximum of 1045 mb recorded on the 22nd.
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ole blue eyes
post Jan 18 2008, 04:10 PM
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Rank: F5 Superstorm
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Group: Founding Member
Posts: 2,743
Joined: 18-March 04
From: Sheffield, United Kingdom
Member No.: 92





Yearly Return 2007

Sheffield Burncross AWS

Period of averages (2000-2007)

Time of morning observation 09:00 GMT


Temperature

Mean Maximum 14.9c
Diff from local average +2.0c

Mean Minimum 8.3c
Diff from local average +2.3c

Mean 11.7c
Diff from local average +2.2c

High Maximum 28.9c August 5th

Low Maximum 2.2c February 8th

High Minimum 18.0c August 4th

Low Minimum -3.9c December 17th

Grass Minimum -9.0c December 14th


Rainfall

Rain Total 1023 mm

124% of Local Average

Rain days

Wet days 182

Most in a Day 88 mm June 14th

RAIN other days over 50mm: NONE


Number of days with: air frost 11 days

Ground frost 48 days

Sleet/snow falling (in the UK from 0000-2400 GMT) 8 Days

50% snow cover at morning observation hour 1 day

Thunder heard (in the UK from 0000-2400 GMT) 5 days

Small hail < 5mm diameter 4 days

Large hail >=5mm diameter none

Fog at morning observation hour 6 days


SUNSHINE

Total sunshine 1281.21 hours
% of average Not Know
Most in a day 13.66 hours May 1st
Sunless days 55


WIND DATA

Days with gale (10min mean wind 39mph/34kts or more) 4 days

Number of days with wind from

North 42 days

North East 10 days

East 22 days

South East 52 days

South 27 days

South West 45 days

West 72 days

North West 38 days

Calm 57 days

Mean wind speed 5.0 mph

Maximum Gust 65.9 mph December 1st


Cloud Cover 74%

Mean Relative Humidity at morning observation 70%

Mean pressure (mb) at 0900 GMT ONLY 1015mb

Pressure anomaly for year (mb)

Maximum pressure at any time of day 1040mb February 3rd

Minimum pressure at any time of day 979mb January 18th and February 12th



STATION NOTES

We have now established a new record wet month of June 2007 with a total of 318mm this was 482% of the average for the month


Monthly Weather Highlights

January
The month was dominated by winds from the warm quadrants namely 8 days from the South East, 2 days from the South, 5 days from the South West, and 10 days from the West and 5 days from the North West. At the end of the month from the 22nd through to the 27th the winds switched to a more Northerly direction. A maximum wind speed of 45 mph was recorded during the storm of the 18th
Temperatures were above normal. The Highest being 13.6c on the 19th. Double figures occurred on 18 days during the month the coldest day was -0.1c which was recorded on the 24th this was the only occasion during the month that an air frost was recorded. Ground frosts were only recorded on 8 days during the month.
Rainfall was well above normal. 150 mm which is 185% of the local average a total of 25mm fell during the storm of the 18th this storm commenced with a low pressure of 977mb and the following morning it had risen to 1011mb after the passing of the storm. The strong winds occurred during the afternoon when the maximum gust of 45 mph was recorded at 15.30 hours and this resulted in Lorries being blown over. In 5.5hours from 10.00 hours to 15.30 hours 19mm of rain fell. The wettest spell of the month was from the 16th to the 21st when 79 mm of rain fell this is almost the monthly January average rainfall.
February
February 2007 saw temperatures were well above normal; this month was the second warmest in the last 50 years. The means were 3.2c on average above the normal for the month and the mean minimum was only exceeded by 1998s value of 4.9c against 4.8c for this months. Double figures occurred on the first 4 days of the month. Then began a cold spell with a maximum of only 2.2c recorded on the 8th this was only a short 4 day spell.
Rainfall was just above normal at 112% with the total of 12 mm on the morning of the 10th including snow melt from the previous day. The first 8 days of the month were dry.
Snowfall was rare with snow only falling on two days and only giving a slight covering one day on the 8th. Further snow began on the 9th at 13.30 then turned moderate at 20.00 hours and ended at midnight this gave a covering of 1 cm. Sadly the next mornings milder weather melted all the snow away.
March

March 2007 was a mild month this was indicated by the fact that mean temperatures were over 2 degrees above the average.

Just like the previous year we had a mini cold spell lasting 3 days giving a minimum air temperature of -0.9c on the 21st. throughout the 18th we had showers of both snow and small hail giving just a light covering that soon melted.

High maximum gusts of 35.9 mph and 35.6 mph were recorded on the 17th and 18th of the month.

The feature of note however was the fact the month was again a dry one with rainfall of only 41mm falling which is 64% of the average.

The days are now getting longer and 9.72 hours of sunshine was recorded on the 21st.

April
April 2007 was a warm month with the period 14th to the 26th quite warm. The temperatures were above the normal but not record breakers.
The month again was dry with38mm of rain falling and this is only 62% of the local average.
May
May was a month that gradually became warmer with 20c + temperatures on three consecutive days 22nd, 23rd and 24th. Then the Bank Holiday Sunday only gave a maximum of 9.9c.
The notable feature was the rainfall which was 94 mm which is 157% of the local average. The 17th to the 25th was a period in which no precipitation was recorded contrasts this with the 12th when 12 mm of rain fell then on the 13th when 35 mm of rain fell and a maximum wind speed of 39.8 mph was recorded during that day.
June

June 2007 was a record breaking month for the Sheffield and South Yorkshire Region it will be remembered for the wettest month on record locally and yet despite all the rain it was a warm month. In keeping with the last month we have entered July with the Atlantic Systems lying further South across the country than what they usually do.

The month was dominated by winds from a Northerly quadrant a total of 12 days with a further 5 days with an Easterly flow. The highest wind was recorded on the 25th with a gust of 30 mph and all day speeds of 15 mph plus was recorded.

Despite the winds from the cold quadrants. The period 8th to the 13th saw maximum temperatures of 20c+ with a maximum of 25.3c on the 11th. Overall the temperatures were above the normal and this despite the short supply of sunshine as on 91.29 hours were recorded during the month. The lowest night temperature was during the night of the 2nd when the ground temperature fell to 3c.

During the month we had 4 storms, the first was singled the start of the major rain fall I heard a single clap of thunder at 15.30 hours on the 13th then the rain commenced over the 13th to 17th I recorded 122mm of rain this was the catalyst for the major flooding during this period we had a further storm on the 15th from 19.00 hours to 21.00 hours with quite vivid lightning. This was the first major flooding as our area borne the brunt of the rain 88mm was recorded. On the morning of the 15th we woke up in Chapeltown to torrents of water and the centre of the village was cut of with floods up to 5 feet deep. The two local roads across the road by my home were closed as water poured out of the woods at Grenoside. This torrential rain flooded the ground and major run off occurred as the ground could not absorb any further water.

The evening of the 19th saw a further heavy storm from 21.30 hours to 22.30 hours and it was a light storm. The heaviness on the atmosphere could be felt and during the night i.e. the early hours of the 20th we had a strong heavy storm which started with a cloud to ground discharge then there was a spectacular display of cloud to ground lightning. These two storms gave a total of 24mm of rain added to the 14mm which was recorded on the 17th.

To this saturated ground on the 0n the 24th and 25th most of the rain commencing after midnight of the 24th a total 107mm was recorded on the Monday and Tuesday we had a repeat of the previous road closures but this time part of the major A61 trunk road from Sheffield to Barnsley was washed away resulting in its closure. I am thankful we live on the higher ground as parts of Hillsborough, Central Sheffield and the Don Valley were like a war zone on the Tuesday Morning. The events are well chronicled from various sources with many stunning photos and BBC Look North and Yorkshire Television reported the events. I even had emails from friends in Kenya asking if my wife and I were safe and well as it was on National Television there as well.

The total rainfall for the month was 318mm and it was indeed a record breaker.

July

July 2007 was a quite month following all the mayhem of June 2007.

Temperature wise it was a month when the averages were as expected, the trend of warm months did not continue.

The floods in the Midlands were not seen in Sheffield again although it was a wet month 103mm was recorded and that was 178% of the average. 22mm rain fell on the 20th

There was a wind gust of 36.9 mph recorded on the 19th.

A rainbow was observed on the 3rd.

There were no thunderstorms during the month


August

August 2007 was an even quieter month than July 2007 which followed all the mayhem of June 2007.

Temperature wise it was a month when the averages were just above the average for the month.

It notable feature this month was the lack of rain. I recorded 25 mm in total which was 37% of the average there were only 7 days in the month when over 1 mm of rain was recorded the 1st to the 10th saw a dry spell in the middle of the month in three days almost 50% of the total was recorded and the highest amount was 8 mm on the 14th from the 20th to the 31st another dry spell followed with on 2 mm of rain falling on the odd day during this spell.

There were two exceptional days of sunshine when I recorded 11.12 hours on the 23rd followed by 12.96 hours on the 24th.

September
September 2007 was a quite and average month for temperatures. There was no windy spell of note either.
The main feature was the lack of rainfall. I recorded 35 mm which is 54% of the average. The first 18 days of the month were dry apart from 2nd when only 2 mm of rain was recorded then 6 of the next 7 days rain was recorded but not in any volume. Then the month ended on a dry note.
October

October 2007 was a quite month in more aspects than one.

The rainfall was 24% of the average giving another dry month following on from the previous month.

The strength of the wind was very noteworthy this month and could best be described as one with slack winds 1.9 mph was the mean wind speed recorded. At 09z when my readings are taken it was Calm for the 10 minute observation period on 13 occasions.

There were 4 days 18th – 21st when a ground frost was recorded.

Overall the temperatures were above normal

November

November 2007 was a month when the temperatures were just over the average.

Again the predominant feature of the month was the lack of rainfall again only 49mm was recorded which is 64% of the average.

There was no exceptionally high gust during the month.
December

December 2007 was an interesting month which started mild with a maximum of 14.4c recorded on the 6th and high temperatures at the end of the month. As the high pressure moved in on the 11th it was to remain as the dominant feature until the 22nd this gave 6 mornings when the wind was calm at 09z. This was a period of low temperatures with a minimum air temperature of -3.9c recorded on the 17th. During this period there were ground frosts on the period 11th to the 25th ground frosts were recorded 11 mornings. Nevertheless the mean temperatures were above average

The rainfall was slightly above average.

A rainbow was observed on the 2nd at 12.10 hours

On the 1st and the 2nd high winds were recorded on the 1st a maximum of 65.9 mph and on the 2nd a maximum of 55.9 mph.

On the evening of the 1st at 22.45 hours a line squall passed through the area there were 8 flashes of lightning with claps of thunder which lasted until 23.00 hours. Small hail was deposited on the ground 12mm deep and at 23.30 hours we had flurries of snow it was just after midnight that the high winds were recorded.
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ole blue eyes
post Jan 13 2009, 06:51 AM
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Joined: 18-March 04
From: Sheffield, United Kingdom
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Yearly Return 2008

Sheffield Burncross AWS

Period of averages (2000-2008)

Time of morning observation 09:00 GMT


Temperature

Mean Maximum 14.3c
Diff from local average +1.4c

Mean Minimum 7.9c
Diff from local average +1.9c

Mean 10.9c
Diff from local average +1.4c

High Maximum 29.6c July 27th

Low Maximum 0.3c December 31st

High Minimum 18.0c July 27th and August 29th and 30th

Low Minimum -5.5c February 20th

Grass Minimum -8.0c February 20th


Rainfall

Rain Total 1174 mm

142% of Local Average

Rain days

Wet days 191

Most in a Day 39 mm July 31st

RAIN other days over 50mm: NONE


Number of days with: air frost 15 days

Ground frost 63 days

Sleet/snow falling (in the UK from 0000-2400 GMT) 15 Days

50% snow cover at morning observation hour 3 day

Thunder heard (in the UK from 0000-2400 GMT) 6 days

Small hail < 5mm diameter 4 days

Large hail >=5mm diameter 8 day

Fog at morning observation hour 7 days


SUNSHINE

Total sunshine 1111.59 hours
% of average Not Know
Most in a day 15.40 hours June 8th
Sunless days 63


WIND DATA

Days with gale (10min mean wind 39mph/34kts or more) 1 day

Number of days with wind from

North 29 days

North East 22 days

East 28 days

South East 47 days

South 31 days

South West 48 days

West 68days

North West 29 days

Calm 64 days

Mean wind speed 4.2 mph

Maximum Gust 46.3 mph March 2nd


Cloud Cover 72%

Mean Relative Humidity at morning observation 69%

Mean pressure (mb) at 0900 GMT ONLY 1014mb

Pressure anomaly for year (mb)

Maximum pressure at any time of day 1045mb February 16th

Minimum pressure at any time of day 965mb March 10th



STATION NOTES



Monthly Weather Highlights

January
January 2008 saw the New Year start with the breaking of records.
The Month began on a fairly quiet note but Winds began to pick up from the 5th and the mean wind speed for the month was 5.1 mph. The winds were from a southerly quadrant.
Rainfall was over average at 150mm this gave 183% of the average for January. There were 16 consecutive days from the 6th to the 21st inclusive when rain fell.
The month was also dull with 42.65 hours of sunshine recorded and a total of 14 Sunless Days.
It was a month when temperature records fell. The Mean Maximum was a+3.8c over the average for the month. The mean minimum was +3.7c and the mean was +3.7c. The 18th 13.8c, 19th 13.5c and 20th 13.5c were the maximum temperatures indicating just how mild it was

February
It can be said the February 2008 was a strange month.
Rainfall was 86% of the average and the last day of the month produced 38mm.
Sunshine again was plentiful with 111.64 hours recorded and only 2 sunless days throughout the month.
Temperatures were always on the mild side with the exception of 6 days where the minimum was below zero. On the 20th at 09.00 hours it was -4.3c. On the mornings of the 19th and 20th at dawn the ground was covered with rime. The leaves and branches of the trees and other plants took on the appearance of a winter wonderland. On the 19th grauple also fell. In the month there was a total of 12 ground frosts.
March
March 2008 was a cold wet month with strong winds.
The month also had the most snow of the winter although it was only in the form of showers falling on a total of 6 days giving no cover at all.
The temperatures were just above the average with a total of 2 air frosts recorded during the month and a total of 8 ground frosts.
Rainfall was the feature and this was above average 191% in total with 19 wet days.

April
April 2008 was a month when the temperatures were just above the average and it felt a cool month. The month started with a brief warm spell and finished in the same manner. We had a minimum of -1.5c on the 6th and ground frost on 6 days. Small hail fell on 4 days and large hail on one of the same days.
This was the month when we had snow cover on one day the 17th and snow fell on 2 days.
The first thunder on the year was recorded on the 27th in a brief storm from 17.30 hours to 18.30 hours and there were 2 discharges.
Rainfall was just below the average although rain was recorded on 20 days but the most was 6mm on three different days within the month
May

Rainfall was below average for the month of May with 47mm recorded, which is 80% of the average up to the 26th only 6mm fell and then 3 consecutive days of showers saw a total of 35mm falling.

The month was not a windy month but it was the direction which was the notable feature 20 days in total from a north/east quadrant with 11 days from the North East. This normally would have given a cold month in fact the air was from a warm source giving above average figures

Ground frosts were recorded on three mornings.

June

June 2008 was a month when the temperatures were just over the averages.
On the 22nd and 23rd we had two days of high winds with a maximum gust of 30.0 mph on both days.
This particular location caught some of the heavy rain showers which mounted up to reasonable totals on the 2nd 20mm in total and on the 26th 21mm in total. The rainfall for the month was 108mm which is 257% of the June average. There were a total of 19 wet days within the month.
The were some long days of sunshine between the 8th to 11th inclusive with a total of 15.14 hours recorded on the 8th.

July

July 2008 was a month when the temperatures were just above average. The Month was also split with a cold middle section but the high temperatures at the end of the month were noteworthy with a peak of 29.6 on the 27th
The Month was breezy with an average wind speed of 5 mph. There was a gust of 34.7 mph on the 17th and 32.4 mph on the 29th
Rainfall was above average the highest rainfall being 39.0 mm on the 31st, the next Highest rainfall was 15.0 mm on the 17th The total for the month was 202 mm this was 207% of the local average
The was a brief Thunderstorm on July 3rd from 14.30 hours – 15.30 hours


August

August 2008 began with a storm in the early hours of the morning of the 1st from 03.00 to 04.00 hours.

The temperatures were just above the August means. The month started with a warm spell and finished with a warm spell

The two prominent features of the month were the dullness of the month only 80.83 hours of sunshine but with only 3 sunless days. The rainfall again was well over the average 113mm which is 164% of the local average. There were 19 Wet Days in total and the 16th gave the most rain 23mm.

There was a wind gust of 26.2 mph on the 12th the winds were from a westerly quadrant. 24th.

September
September 2008 was another average month temperature wise while rainfall was well above the September average
September was a remarkably calm month without any really strong winds a feature was at 09z I record calm conditions for 10 minutes on no less than 11 occasions.
Rainfall above average at 158% of the local average. Rain fell on 9 days at the start of the month with 23mm recorded on the 5th and 38mm in the hour on the 7th the rest of the month saw very little rain until the 16mm recorded on the 30th.
On the afternoon of 7th September we had a cloudburst over the North Sheffield Area between 16.00 hours and 17.00 hours. We had six flashes of lightning but within the hour we had a total of 38mm of rain. At the peak rain was falling at a rate of 158mm per hour. My garden was a waterfall and as I have just had all the drives block paved water poured onto the patio and at one stage it was 6 inches deep with the drains unable to come with the amount of falling precipitation.

On the evening of 9th September @ 21.00 hours two cloud to cloud discharges were observed.

October

October was an average month temperature wise.

Rainfall however was well above normal with a total of 155mm which is 209% of the average. Within the month there were 20 wet days. On the 4th 35mm was recorded and on the 25th 34mm was recorded.

The 28th of the month onwards say cold nights setting in under clear skies.

The winds again for an autumnal month were fairly calm with an average wind speed of 4.7 mph and winds from of southerly quadrant

November

November 2008 was a month when it was warmer than the average the night were above the average giving a mean minimum of +2.1c There were long periods of mild weather which tailed off towards the end of the month when it became colder
The rainfall was just below average.
There were high winds on the 18th to the 25th with high gust recorded with a maximum of 36.9 mph on the 21st
Snow fell on 2 days the 23rd accompanied by freezing rain. On the 29th Snow Flurries were observed in the evening.
December

December was a typical December cold and grey the temperatures were just about on average.

A feature was a total of 18 days when a ground frost was recorded. An air frost was also recorded on 3 days.

It was a calm month with an average wind speed of 3.6 mph but the dominant feature was the number of calm days at 09z when I take my readings 10 in total. On the 21st High Pressure Started to build and the pressure remained high into January 2009. The highest wind gusts were recorded on the 19th and 20th.

It was a dry month with only 74% of the average rainfall recorded this was a total of 74mm with the highest fall of 13mm on the 13th
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ole blue eyes
post Jan 28 2010, 11:22 AM
Post #5




Rank: F5 Superstorm
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Group: Founding Member
Posts: 2,743
Joined: 18-March 04
From: Sheffield, United Kingdom
Member No.: 92





Yearly Return 2009

Sheffield Burncross AWS

Period of averages (2000-2009)

Time of morning observation 09:00 GMT


Temperature

Mean Maximum 14.4c
Diff from local average + 1.4c

Mean Minimum 7.9c
Diff from local average + 1.9c

Mean 11.1c
Diff from local average + 1.6c

High Maximum 30.9c July 1st

Low Maximum 0.1c December 18th

High Minimum 18.7c July 14th

Low Minimum -9.9c December 21st

Grass Minimum -10.0c December 22nd


Rainfall

Rain Total 1093 mm

132 % of Local Average

Rain days

Wet days 174

Most in a Day 41 mm June 10th

RAIN other days over 50mm: NONE


Number of days with: air frost 22 days

Ground frost 75 days

Sleet/snow falling (in the UK from 0000-2400 GMT) 16 Days

50% snow cover at morning observation hour 21 days

Thunder heard (in the UK from 0000-2400 GMT) 7 days

Small hail < 5mm diameter 2 days

Large hail >=5mm diameter 0 day

Fog at morning observation hour 8 days


SUNSHINE

Total sunshine 1286.77 hours
% of average Not Know
Most in a day 15.54 hours June 1st
Sunless days 48


WIND DATA

Days with gale (10min mean wind 39mph/34kts or more) 2 days

Number of days with wind from

North 23 days

North East 19 days

East 27days

South East 78 days

South 32 days

South West 45 days

West 62days

North West 30 days

Calm 49 days

Mean wind speed 4.5 mph

Maximum Gust 49.2 mph January 22nd


Cloud Cover 73%

Mean Relative Humidity at morning observation 68%

Mean pressure (mb) at 0900 GMT ONLY 1014mb

Pressure anomaly for year (mb)

Maximum pressure at any time of day 1040mb September 11th

Minimum pressure at any time of day 973mb January 23rd



STATION NOTES

This last year was the wettest on record for 50 years locally. 1066mm was recorded in 2000, 1037 in 2002 and this last year 1093 mm

2009 saw snow lying for a total of 21 days a period in February of 11 days and 10 days in December. Snow fell in January, February and March y=then the period of snow in December.

I recorded my lowest air temperature of -9.9c December 21st


Monthly Weather Highlight


January
January 2009 was an average January with the mean temperatures just slightly above average. The month started with a cold spell which ended on the 12th during period 5 air frosts were recorded with a minimum of -3.9c on the 10th. There were a total of 20 ground frosts within the month with the first 11 days of the month all with a ground frost.
Rainfall was just below average with no days of really heavy rainfall but there were 16 Wet Days within the month, Sleet and snow fell on 3 days within the month.
It was a calm month with a mean wind speed of 4.0 mph and I recorded calm conditions at 09z on 12 days with dense fog on the 29th
On the 17th pressure began to fall as a low was established and on the 23rd pressure fell to 973 mb and only rose again on the 27th as higher pressure was established.

February

The interesting weather all happened at the start of the month with the first snow of any significance for a number of years. The first 11 days of the month saw snow falling and the snow lay on the ground through to the 14th.
Rainfall was below average 44 mm accounting for 55% of the average and this included snow melt. The 9th saw 9mm of rain falling. The month was fairly calm with a maximum gust on the 22nd of 30.9 mph. Westerly winds prevailed 9 days and also calm conditions on a further 9 days
March
March 2009 was a mild month with the temperatures above the means for the month
It was again a dry month with 45mm of rain falling which is 82% of the average with only 7 Wet Days
April
April 2009 was a dry and fairly warm month. Until the last few days of the month there was hardly any rain whatsoever.
The rainfall was just below average but only 54 mm falling in total and three consecutive days gave a total 31mm.
There were no high winds to report during this month and only one ground frost.
May
At the commencement of the month it looked as if May was going to be a cold month and it was not until the 23rd that the temperature exceeded 20c with 25.3c recorded on the 29th. The nights were normal with a ground frost of -2.0c recorded on the night of the 17th.
Rainfall was double the average with a wet spell commencing on the 14th and lasting until the 21st with the wettest day the 17th giving 26mm of rain. A weak thunderstorm occurred on the evening of the 15th.
June
June was a wet month with above average temperatures
The dominant feature was wind direction with dominance of North 4 Days North East 7 Days and East 7 days.
This was a month of low cloud which came across Yorkshire from the North Sea yet despite this the temperatures were above average.
June was a wet month with 135mm of rain recorded which is almost double the mean for June and yet there were only 13 Wet Days recorded. 3 of the days produced high rain fall 34mm on the 5th, 41mm on the 10th and 31mm on the 15th.
There were Thunderstorms on 3 Days as follows 10th Storm from 16.00 hours to 19.00 hours15th Storm 11.30 hours to 13.00 hours and 15.30 hours to 20.30 hours 22nd 19.22 hours to 20.10 hours

July
This month was above average temperature wise.
The winds were from Southerly Quadrant on a total of 20 Days
The highlight yet again was the amount of rain which fell: a Total of 301% of the average with a total of 23 Wet Days

August
August 2009 was a dry month with below average rainfall. The temperatures were just above the normal means for this part of the country.
The winds were predominantly from a Southerly quadrant on a total of 21 days within the month. It was never a windy month but a gust of 32.2 was recorded on the 31st
September
The feature of the month was the dryness of the month the first 2 days were wet giving a total of 24mm of rain on the 8th 4mm was recorded and then the rest of the month was dry
October
October 2009 was an average month with temperatures just above the mean. Rainfall was average too and is contributing to the dry autumn.
The feature of the month was a ground frost of -4.0c as early as the 5th of the month
November

It was a warm month overhaul with the mean temperatures above the normal despite this 6 ground frosts were recorded within the month. The highest maximum was on the 1st a temperature of 15.9c was recorded.
During this warm month the predominant feature was the rainfall. A total of 147mm was recorded which 184% of the local average. It was dry on 5 days within the month. The wettest day was 17th when 18mm was recorded. The winds were from a southerly quadrant indicating how warm and wet it was.
December

December 2009 was a cold wet month.
The temperatures were down against the local averages.
There was 133mm of precipitation including snow melt recorded in the month this was 155% of the average.
Sleet and snow fell on 6 days within the month
During this cold month a total of 18 ground frosts were recorded and 7 air frosts with a cold spell from 14th onwards with a minimum of -9.9c recorded on the 24th






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ole blue eyes
post Jan 17 2011, 01:59 PM
Post #6




Rank: F5 Superstorm
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Posts: 2,743
Joined: 18-March 04
From: Sheffield, United Kingdom
Member No.: 92





Yearly Return 2010

Sheffield Burncross AWS

Period of averages (2000-2010)

Time of morning observation 09:00 GMT


Temperature

Mean Maximum 13.3c
Diff from local average + 0.2c

Mean Minimum 6.6c
Diff from local average + 0.3c

Mean 9.8c
Diff from local average -0.1c

High Maximum 30.4c May 23rd

Low Maximum -3.1c December 20th

High Minimum 20.7c July 7th

Low Minimum -7.4c December 20th

Grass Minimum -9.0c December 20th


Rainfall

Rain Total 756.4 mm

91% of Local Average

Rain days

Wet days >0.2 = 19 days

Wet days 1 mm = 161 days

Most in a Day 29.2 mm September 6th

RAIN other days over 50mm: NONE


Number of days with: air frost 48 days

Ground frost 107 days

Sleet/snow falling (in the UK from 0000-2400 GMT) 42 Days

50% snow cover at morning observation hour 37 days

Thunder heard (in the UK from 0000-2400 GMT) 4 days

Small hail < 5mm diameter 3 days

Large hail >=5mm diameter 0 day

Fog at morning observation hour 14 days


SUNSHINE

Total sunshine 1250.36 hours
% of average
Most in a day 15.68 hours June 22nd
Sunless days 64


WIND DATA

Days with gale (10min mean wind 39mph/34kts or more) 1 days

Number of days with wind from

North 46 days

North East 22 days

East 36 days

South East 38 days

South 20 days

South West 38 days

West 75days

North West 36 days

Calm 54days

Mean wind speed 3.5 mph

Maximum Gust 42.7 mph August 20th


Cloud Cover 53%

Mean Relative Humidity at morning observation 64%

Mean pressure (mb) at 0900 GMT ONLY 1015 mb

Pressure anomaly for year (mb)

Maximum pressure at any time of day 1043mb January 26th

Minimum pressure at any time of day 974mb November 8th

STATION NOTES

2010 was an average year when all the means calculated we had a summer June, July, August and September also we had a winter January and December. It was just a little dryer than normal but it was not a recorded breaker here in Burncross it was not as cold as 1963. Snow Lay for a total of 37 days within the year and it fell on 42 days. Ground Frosts were recorded on 107 days and Air Frosts on 48 days


Monthly Weather Highlight

January
This month was a cold month with only one day the 7th when the mercury failed to rise above zero giving an Ice Day. The eight days January 3rd to 10th inclusive saw minimum temperatures below zero. There were ground frosts on 25 days within the month the notable feature was from the 1st through to the 18th inclusive a ground frost was recorded every morning from 23rd to the 31st inclusive.
It was a dull month with 13 days recorded without any sun of these 7 days running 10th to the 16th inclusive saw no sunlight.
The Month was dominated by Snowfall with the first lying snow arriving on the 1st heavier snow came on the 5th taking the depth up to 5cm. The last snow which produced any cover was on the 13th
February
February 2010 was the coldest February since Feb 2001. This proves despite all the talk about global warming we still have cold winters.
Once again February was a quite month. The highest wind speed recorded was 28.6 mph on the 25th. The mean wind speed was only 1.7 mph. The main feature of the month was the domination of Northerly based airflow’s with very little in the way of Southerly influence. This was due to the jet stream being positioned further South than usual
It was a cold month with the night time temperatures below average for the majority of the month with only one night coming in above average 4.5c on the 26th. The coldest night was on the 3rd with -1.1c being recorded. On only 1day failed to record a ground frost that was the 26th while 9 air frosts occurred. The minimum recorded was -1.9c on the 21st
Returning to the continuing theme of snow fall we had snow falling on 13 days during the month much of it in the form of showers. There was moderate snow falling at 09z on the 21st and it lay throughout the next day but quickly melted away. All the snow showers falling lead to 119mm of rain being recorded, which is 186% of the local average, the heaviest rainfall 21mm fell on the 25th.
March
March 2010 was a fairly average with temperatures just over the average but nevertheless it was a month of 2 halves cold at the start and warm at the end.
The winds this month were from a South Westerly quadrant with March never roaring like the lion as the mean wind speed was 2.9 mph with a maximum gust of 38.9 mph on the 17th.
Rainfall was average with an almost dry period up to the 18th when 4mm fell and the remaining rain of 58 mm in the latter part of the month.
Up to the 13th there was no double figure maximum temperature recorded but beyond this date temperatures recovered. The first 13days of the month saw a ground frost recorded each morning and air temperatures below freezing on 4 days with a minimum of -3.5c on the 8th.
April
April 2010 was a dry month with temperatures above average and the winds dominating from a Southerly Quadrant
During the daylight hours impressive temperatures were record with a high of 20.8c reached on the 27th. The mildness of the daylight hours was offset by some cold nights with the minimum temperature of 1.8c recorded on the 27th and 28th. The same two nights gave ground minimums of -3.0c. The warmest night was the 29th with 12.8c being reached.
April 2010 will be a month to remember when I did not record a sunless day throughout the month although recorded only 0.01 hours on the 6th
It was also a dry month with rainfall of only 34mm which is 55% of the average with only 8 wet days throughout the month
May
May 2010 was yet another dry month the temperatures were just above the means for the month. There were no storms of any detail to mention with the highest gust of 26.6 mph recorded on the 26th.
Winds dominated from a northerly quadrant helping to keep the month cool. There was a brief warm spell from 18th to the 24th when I recorded a maximum of 30.4 on the 23rs. During the period I recoded some very long sunlight values on the 22nd 14.43 hours, on the 23rd 13.04 hours and on the 24th 12.49 hours.
A measure of how cold it was during in the month were the ground frosts recorded on the 12th and 13th.
This month which again was dry saw only 34mm of rain 59% of the local average. There was a dry spell of 12 days from the 13th through to the 25th
June
June 2010 was a month with temperatures well above average and also dry containing the trend of dry months.
The month began to show a trend towards warm weather but that fell away on the 8th when the maximum was only 17.9c during the day and the minimum overnight was 8.1 hours. The period 8th to the 20th inclusive saw lower temperatures the on the 21st the warm spell commenced giving maximums of 30c on the 27th and 28th and 29.8c on the 29th the nights were warm too.
June was a dry month with only 54mm of rain falling that is 77% of the local average with a total of 11 wet days. If the rain of the 6th 13mm and the rain of the 16th again 16mm in total had not fallen the month would have been very dry.
The month was sunny with a total of 184.42 hours recorded. On the 22nd the day after the summer solstice a remarkable figure of 15.68 hours of sun was recorded. There were 4 sunless days within the month.
July

July 2010 was a month which saw temperatures slight above the average for the month. Within the month there was only one thunderstorm but nevertheless there were some very beefy showers around this gave rainfall above average 117% but there were 5 days at the start of the month when no rainfall was recorded

August

August 2010 was an average month temperature wise with all readings coming in at the means.

It was a dry month with only 66% of the average rainfall recorded. From the 4th to the 8th inclusive no rain was recorded.

Thunder was heard on the 12th @ 16.30 hours in a heavy shower.

September

September 2010 was an average month with the temperatures just over the normal means. Rainfall also was average most of the rain fell in one day with 29.2mm falling on the 6th. After that rainfall, there was only another double figure day within the month on the 23rd when 12mm was recorded. Winds dominated as per normal from the South West.

October

October 2010 was a month when the temperatures were just below the means. The majority of the rain fell during the first three days of the month when 40 mm fell. On the 1st a total of 17.7 mm fell on the 2nd 2.8mm and on the 3rd 17.1 mm.

A maximum gust of 24.2 mph was recorded on the 29th but overall the mean wind speed was 3.1 mph with winds coming from a Westerly Quadrant.

The month started on a mild note with 17.9c recorded on the 5th. This mild spell continued until the 10th when cooler weather arrived. The coldest day was on the 20th and the coldest night was 0.8c on the ground just above freezing

November

November 2010 was a below average month temperature in all aspects. November can be described as a dramatic month with a great contrast between the start and thee end of the month. The latter part of the month was cold enough to bring the month well below the monthly means. November also had the first stormy spell of weather for several years during the 12th. It was my privilege to fly out of Leeds Bradford airport on that morning and we spent over 1 hour taxing and holding waiting for a break in the cross wind which finally came allowing us to take off one we were above the clouds it was a matter of banking and flying South to the sun. On my return home I recorded a maximum of 33.8 mph which was a lot less than I anticipated. It only goes to show the difference between a high level sight and also a low level site.

The month commenced on a warm note with a maximum of 17.1c recorded on the 4th also the successive day was warm as were the 11th and 112th when the maximum recorded was 11.6c. The temperatures then fell away with a cold spell setting in on the 25th and temperatures plummeting towards the end of the month. Rainfall was below average 63.4 mm giving a total of 79% the only day of an appreciable rain was the 2nd when 13.9 mm was recorded. Snow arrived overnight on the 30th giving 12cm of fresh snow. More Heavy Snow fell during the evening bringing a depth of 19 cm by the morning. On the 7th and 8th with the advent of a storm the pressure fell from 1014 mb at 09z on the 7th to 970 mb on the morning of the 8th.
December

The month of December 2010 was a very interesting month to observe. We started the month with the ground already covered by snow to a depth of 8cms and during the 1st further snow fell a total of 11cms giving a total depth of 19cms. On the 2nd snow showers occurred giving a further 2cms making a total of 21cms. On the 3rd and the 4th further snow showers occurred giving a further 1 cm each day and overall a grand total of 23cm in the old imperial just over 9” in depth. We then had a thaw and again snow showers in the evening of the 7th.on the 11th the snow had all gone. This was the first period of lying snow from the 1st to the 10th inclusive. There was a shower of small hail on the 15th.

On the 16th we had rain turning to sleet and then snow giving a new depth of 1 cm on the morning of the 17th. On the 18th we had snow showers on the 22nd snow flurries overnight and again on the 23rd. We had a shower of grauple on the 25th then snow flurries on the 26th and as I observed, on the 27th light snow was falling which then turned to sleet, then rain over the 24 hours period. On the 28th the snow had all melted away with the arrival of the warm conditions.

Whilst I was about on the morning of the 17th I noticed “Diamond Dust” falling in the intense sunlight which was a first for me again.

Much had been written about the intense cold temperatures A Mean Maximum of 3.3c which is -3.7c against the averages. Mean Minimum -1.2c which is -3.5 against the averages and the mean 1.0c which is -3.7c against the averages new records well the means in 1981 were colder Maximum 2.2c, Minimum -1.8c and the Mean 0.2c.

The period 1st to the 9th inclusive saw minimum temperatures both in the air and on the grass below zero. Then came a warm interlude through to the 16th when the cold began to set in again during this period on the 11th a maximum temperature of 8.8c was recorded with the 10th also having a high maximum of 7.7c.

The real intense cold saw ICE DAYS on the 17th through to the 21st inclusive with a minimum air temperature of -7.4c and a grass minimum of -9.0c recorded on the 20th. We still had minimum air temperatures right through to the 27th and then the temperatures became warmer.

The month was dry with a total of 41.4 mm of precipitation recorded 48% of the average. 7.5mm of that total was sleet and rain which fell on the 27th the remaining total75% of that was snow melt.

The winds were light, 2.4 mph was the mean average for the month with West been the dominant quadrant 12 days Westerly and 6 days North Westerly. On the evening of 10th we had a strange occurrence. The wind was blowing from the West-North West about 21.00 hours the wind picked up speed and I recorded a gust of 34.2 mph and I am in the lee of some local high ground. The sky was clear and the humidity plummeted. This occurs in the Sheffield area as the winds are squeezed by inversion over the Peak District Hills giving “Lee Waves”.
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+Quote Post
ole blue eyes
post Jan 11 2012, 10:01 AM
Post #7




Rank: F5 Superstorm
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Group: Founding Member
Posts: 2,743
Joined: 18-March 04
From: Sheffield, United Kingdom
Member No.: 92





Yearly Return 2011

Sheffield Burncross AWS

Period of averages (2000-2011)

Time of morning observation 09:00 GMT


Temperature

Mean Maximum 15.2 c
Diff from local average + 2.1c

Mean Minimum 8.0c
Diff from local average + 2.3c

Mean 11.3 c
Diff from local average +1.6c

High Maximum 31.3 c 27th June

Low Maximum 2.0 c 27th January

High Minimum 19.0 c 27th June

Low Minimum -2.7 c 21st January

Grass Minimum -5.4 c 29th January and 28th February


Rainfall

Rain Total 543.6 mm

66% of Local Average

Rain days

Wet days >0.2 = 62 days

Wet days 1 mm = 107 days

Most in a Day 22.5 February

RAIN other days over 50mm: NONE


Number of days with: air frost 10 days

Ground frost 37 days

Sleet/snow falling (in the UK from 0000-2400 GMT) 15 Days

50% snow cover at morning observation hour 3 days

Thunder heard (in the UK from 0000-2400 GMT) 4 days

Small hail < 5mm diameter 7 days

Large hail >=5mm diameter 1 day

Fog at morning observation hour 4 days


SUNSHINE

Total sunshine 1313.14 hours
119% of average
Most in a day 15.68 hours June 3rd
Sunless days 63


WIND DATA

Days with gale (10min mean wind 39mph/34kts or more) 0 days

Number of days with wind from

North 27 days

North East 16 days

East 36 days

South East 64 days

South 52 days

South West 54 days

West 80 days

North West 18 days

Calm 18 days

Mean wind speed 3.7 mph

Maximum Gust 37.6 mph March 31st and April 1st


Cloud Cover 66%

Mean Relative Humidity at morning observation 60%

Mean pressure (mb) at 0900 GMT ONLY 1015 mb

Pressure anomaly for year (mb)

Maximum pressure at any time of day 1042 mb March 23rd

Minimum pressure at any time of day 982mb December 13th



STATION NOTES

2011 can be summed up as a year when temperatures were over the local means. It was a dry year with 66% of the local average r5ainfall giving a total of 829.32 mm. The wettest month was December with 102.2 mm and the driest was March with only 7mm. If February and Decembers total were taking away it would have been a dry year. It was windier than usual a Mean Wind Speed of 3.7 mph @ 09Z. Winds were mostly from a Southerly Quadrant with a total of 170 days.



Monthly Weather Highlights

January

January 2011 was an average month temperature wise with the means almost on the average. The month had a warm spell 12th – 16th inclusive with a maximum of 12.6c on the 13th with a cold spell on the last 5 days of the month when the minimum was -2.5c on the 31st. Within the month there were 17 days of ground frosts. Snow fell on 3 days within the month yet there was a wind from a westerly quadrant on 16 days within the month. Nevertheless it was rainfall which was the feature or lack of it as I recorded 44% of the January average with 12.1mm on the 7th which included 3cms of snow melt accounting for 33% of the total recorded. From the middle of the month onwards 1.5 mm only was recorded.

February
February 2011 was a mild month which finished winter on a mild note with the mean temperatures well above average. If a cold spell had not occurred between the 13th – 23rd inclusive it would have been a warmer month. Ground frosts were only recorded on 4 mornings. The feature on the month was the amount of rain. I recorded rain on 20 of the days within the month with the 3rd, 4th and 5th making up the bulk of the rainfall. 46.3 mm recorded in the 3 days with the wettest the 3rd with 22.5 mm. Sunshine was at a premium as I recorded 5 consecutive sunless days with only 43 hours of sunlight recorded. The 1st to the 7th saw the highest wind gusts with 36.5 mph recorded on the 4th
March
March 2011 was a record breaker in terms of rainfall. I recorded just 7mm which is 9% of the average. The wettest day was the 30th when 2.7 mm was recorded this was preceded by 1.8mm on the 13th. The 5th, 6th, 10th 16th and 17th gave the remainder of the total. This was the driest March on record locally for 58 years.

March was above normal temperature wise with a good warm spell from the 21st to the 25th and the plant growth was most notable, with the temperature peaking at 18.8c on the 23rd. The 26th was a cold day with a sudden plunge in temperature with a maximum of 8.4c recorded that day. The morning of the 8th under clear skies gave an air frost when -0.4c was recorded as a minimum throughout the month 11 ground frosts were recoded
April

April 2011 was a record breaking month in terms of warmth for this time of the year beating the previous records which were set in April 2007. The mean maximum was +5.6 c. The mean minimum was + 3.7c and the mean was +4.1c. There were cool nights the minimum on the 4th was 4.9c, the 12th 5.2c and the 28th gave a minimum of 4.4c. This was offset by warm days the period 21st to 23rd gave maximum temperatures of + 20c On the 1st a gust of37.6 mph was recorded. The wind direction was predominantly northerly on 14 of the days within the month. It was also a sunny month with sunshine 135% of the average. The month was dry with 17 consecutive days with no rain during the period 6th to the 22nd. On the 3rd and 4th over the two days 9.3mm of rain fell.

Then came the event of note on Saturday 23rd. There were warnings of thunderstorms given and the met office graphics were showing heavy rain for the part of Sheffield in which we live. During the day the temperature climbed to 23.5c. We were out visiting and at 14.30 we heard the first thunder accompanied by a flash of lightning. Welcome rain at long last for the bone dry garden. We then had small hail to start the storm; this was followed by heavy rain as we set off home down the hill into Hillsborough. We were met by flooded roads and as I drive an MG Salon which is low I turned back to find another way home. As we were standing in traffic we experienced large hailstones which sounded like machine gun fire on the car roof this left un-flooded ground covered with a blanket of hail. Finally after parking up the car and allowing the storm to abate, we finally made it to higher ground and home. Manhole covers were tossed into the air and I observed a fountain of water from 1 drain about 1 metre high.

May

May was another warm month and the temperatures exceed those of Aprils which were above average therefore taking into account the longer days the weather was exceptional The warmest day was the 6th when the maximum recorded was 23.3 c and yet part of the day was cool and overcast so the forecasted storms were not triggered as the temperature did not climb to the expected heights. On the 4th there was a ground frost and I recorded a grass minimum of -0.4c the minimum air temperature that night was 2.8c. All the cold nights occurred in the first few days of the month. A maximum of 20c + was reached on the 5th to the 11th inclusive and again on the 17th. Thereafter during the months the temperatures dropped slightly

June

June was not worthy on the title of “Flaming June” this year. The month started off with high temperatures and then they fell away. Contrast the 10th the maximum was only 14.4 and on the 12th the minimum was 6.0c this was the day we had 21.1 mm of rain. If it were not for the 2 hot days the 26th Maximum 29.5 and the 27th maximum 31.3c with a minimum temperature that night of 19c it would have been a cold month.

We had a short lived storm at noon on the 8th with nothing spectacular. In the day we only had 6.7 mm of rain. In total rainfall worked out at 84% of the average. We had rain on 5 days running 20th to the 24th inclusive giving a total of 21.5 mm and on the 12th we had 21.1 mm of rain.

July

July is normally a dry month the local average is 61.3mm this was a dry month when you look at rainfall of 26.8mm only 44% of the average. There were not wet day the most rainfall occurred on the 7th when 6.3mm fell Temperature wise the month started in the low twenties until the 16th when they fell away to the high teens. The 31st of the month again was a hot and sticky day with storms forecast but they gave North Sheffield a miss. Thunder was heard in the distance and we had a couple of C to G discharges around 19.30 hours in the evening There was some cool night’s grass minimums of 6.8c were recorded on the 23rd and 30th Grass minimum below 10.0c were recorded 14 times during the month. There were 3 nights when the Screen Minimum was below 10.0c

August

August was a month that will live in the memory for a very long time here in Burncross. I knew that there was an aurora alert issued for the evening of 6th August. Not expecting to see a thing as I retired to bed the lights went off and the curtains were opened and despite all the light pollution I could see in the North a green glow amongst the cloudy conditions, if I would have had a clear night the display would have been outstanding.

August again continued the dry conditions with only 62% of the average rainfall recorded 41mm in total but for the 22mms which fell during the 24th and 26th it would have been a dry month. There was a slight storm in the evening of the 3rd with no appreciable rain recorded but 40 miles to the East if was a different picture.
Temperature wise the period 1st – 3erd inclusive was warm with a maximum of 28.6 with heavy storms forecast yet we only got a slight storm with 2.2mm of rain. The 26th was a cold day with a maximum of 14.0c recorded although it was sunless all day which accounted for a low maximum. Overall the mean temperatures for August were just above the average.

September

September was a warm and dry month. This is surprising as ex hurricane Katina did not produce very much rain, during the passage of the storm pressure fell to 993 mb with a maximum wind speed of 27.1 mph and rain 4 mm in total. There were no Thunderstorms within the month. Rainfall was recorded on 13 days within the month but amounts were small and only gave a total of 26.7 mm which is 42% of the average for the city.

We booked a few days away on the Lincolnshire Coast and we basked in the Warm Weather. When we arrived on Monday 26th we were treated to a very bright sundog within the cirrus cloud. Then the hot weather arrived and when I am away I have my next door neighbour reads the instrumentation. On the 30th the maximum recorded was 27.2 c the warmest night was 22nd when the air temperature was 15.5c. In contrast the lowest maximum was 8.7c on the 15th with a grass minimum of 6.3 c and the highest minimum was 14.2c on the 29th

October

October 2011 was a warm month with the mean maximum temperature coming in 2.4c above the average. It was a very warm start which was the continuation of the warm end to September the maximum on the 1st was 27.0 c, the following two days were also warm. Right through to the 14th with the exception of the 6th it was a mild spell.

November

This November was the mildest on record locally for mean air temperature. For Minimum Mean Air Temperature it surpassed all previous records. Even the Maximum Air Temperature was just short of the 1994 and 2009 record breakers. A maximum of 16.6c was recorded on the 3rd whilst the lowest was 9.4c on the 20th. It was almost a frost free month with a grass minimum of -0.4c recorded on the 23rd

December

December was a warm, wet and windy month. At the start of the month above average temperatures were recorded and it was not until the 13th that any colder weather began to feature, this spell lasted through until the 18th, when on the 19th and 20th temperatures showed a recovery. During this period the coldest day was the 16th with a maximum temperature 3.2c recorded overnight there was a minimum air temperature of -0.7c recorded and a grass minimum of 2.4c the next two mornings also saw a ground frost.
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