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TriC
Rank: F5 Superstorm
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London Ontario
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Joined: 5-December 09
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Local Time: Oct 24 2014, 12:09 PM
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TriC

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5 Dec 2013
Just was on youtube the other day and saw this video showing the tornado siren system in action in London Ontario near western University. The city is looking to expand the system to cover most the city within the next few years

http://www.youtube.com/watch?v=L-go6Q31FZY
2 Aug 2013
Watches up for Southwestern Ontario. looks like some good cells moving over lake Huron in a bit.

QUOTE
Severe thunderstorm watch for
London - Parkhill - Eastern Middlesex County issued

Risk of severe thunderstorms this afternoon and evening.

Scattered thunderstorms are expected to develop over the above regions this afternoon. Some of these storms will have the potential to become severe with damaging winds, large hail, and torrential downpours. The threat for severe storms will end by mid-evening.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.



Attached File(s)
Attached File  son.png ( 35.48K ) Number of downloads: 0
 
14 Jul 2013
Weather Models are showing a major out break of storms near the end of the week that will break the heat!

Also the risk of some lake breeze convergence storms starting Monday as the heat moves in.

EC
QUOTE
ACCN10 CWTO 142020
Forecast of thunderstorm potential for the province of Ontario
Issued by Environment Canada at 4:18 PM EDT Sunday 14 July 2013.
The next statement will be issued at 4.00 AM Monday.
---------------------------------------------------------------------
Forecast of thunderstorm potential.

Tonight..Isolated non-severe thunderstorms with heavy downpours
Along a broad swath from the Atikokan area northeastward to Moosonee.

Monday..A low chance of thunderstorms over southwestern
Ontario along the Lake Erie lake breeze, however any storms which do
develop could produce torrential downpours with rainfall
Amounts near 50 mm. There is also a chance of non-severe
thunderstorms over Northern Ontario, in a swath from around Fort
Frances northeastward to near Moosonee.

Tuesday..A slight risk of severe thunderstorms over Northwestern
Ontario, from the Manitoba border eastward to Lake Superior and
northward to the Big Trout Lake area, with damaging wind gusts being
the main concern. There is also a chance of thunderstorms over
northeastern and Southern Ontario. Any storms which develop over
Southern Ontario could produce torrential downpours with rainfall
amounts near 50 mm.



SPC
QUOTE
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0356 AM CDT SUN JUL 14 2013

VALID 171200Z - 221200Z

...DISCUSSION...
MULTI-DAY SEVERE EVENT POSSIBLE D5 /THU JUL 18/ THROUGH D7 /SUN JUL
20/

MEDIUM RANGE GUIDANCE FROM THE GFS...ECMWF AND CMC GLOBAL MODELING
SYSTEMS HAS BEEN CONSISTENT WITH THE LARGE SCALE PATTERN EVOLUTION
DURING THE D4-8 PERIOD SHOWING DEVELOPMENT OF BROAD LONG WAVE TROUGH
MOVING ACROSS SERN CANADA...THE GREAT LAKES AND NERN STATES. AS
THIS OCCURS A SURFACE LOW...INITIALLY OVER THE NRN PLAINS...WILL
MOVE ENEWD ACROSS THE NRN GREAT LAKES AND SERN CANADA WHILE A
TRAILING COLD FRONT EXTENDING SWWD FROM THE LOW ADVANCES SEWD ACROSS
GREAT LAKES AND NERN STATES. ALTHOUGH THE ECMWF DETERMINISTIC RUNS
AND ENSEMBLE SYSTEMS HAVE EXHIBITED MORE RUN-TO-RUN CONTINUITY THAN
THE GFS IN THE HANDLING OF THE SHORT WAVE FEATURES AND ASSOCIATED
WIND FIELDS ASSOCIATED WITH THE LONG WAVE TROUGH...A SIMILAR LARGE
SCALE SIGNAL FROM MULTIPLE MODELING SYSTEMS SUGGESTS PATTERN
PREDICTABILITY IS RELATIVELY HIGH DURING THIS PERIOD IN THE REGION
OF INTEREST.

A VERY MOIST AND UNSTABLE AIR MASS IS LIKELY TO BE PRESENT OVER THE
NRN PLAINS/UPPER MS VALLEY AND INTO THE NERN STATES ON D4-5 IN
ADVANCE OF THE SURFACE LOW AND COLD FRONT. THIS WILL INCREASE THE
POTENTIAL FOR WIDESPREAD DAMAGING WIND GUSTS AND OCCASIONAL HAIL TO
OCCUR WITH SEVERE STORMS ALONG AND AHEAD OF THE COLD FRONT.
ALTHOUGH PRIMARY THREAT AREAS MAY BE MODULATED BY EFFECTS OF PRIOR
CONVECTION/OUTFLOW BOUNDARIES...OVERALL SYNOPTIC SCALE FORCING
APPEARS SUFFICIENT TO DELINEATE REGIONS OF ENHANCED SEVERE POTENTIAL
DURING THIS PERIOD.

D5 /THU JUL 18/...SEVERE STORM POTENTIAL IS EXPECTED TO INCREASE BY
LATE AFTERNOON/EVENING OVER THE UPPER MS VALLEY ALONG/NORTH OF A
WARM FRONT...WITH SEVERE STORMS POSSIBLY SPREADING EWD DURING THE
OVERNIGHT HOURS TOWARD THE GREAT LAKES. THIS WILL OCCUR AS THE
SURFACE LOW MOVES EWD AND THE LOW LEVEL JET VEERS...STRENGTHENS AND
BECOMES COUPLED WITH A STRONG WNWLY MID/UPPER LEVEL JET POSITIONED
IMMEDIATELY TO ITS NORTH.

D6 /FRI JUL 19/...THE ELONGATED COUPLED LOW/MID LEVEL JET STRUCTURE
IS EXPECTED TO PROGRESS EWD ACROSS THE GREAT LAKES AND INTO THE NERN
STATES AS THE SURFACE LOW MOVES ACROSS SRN CANADA...AND THE COLD
FRONT MOVES SEWD ACROSS THE GREAT LAKES. SEVERE STORM POTENTIAL IS
EXPECTED TO CONTINUE EWD/ESEWD ALONG AND AHEAD OF THE COLD FRONT
FROM THE GREAT LAKES INTO NRN PARTS OF THE NERN STATES.

Attached File(s)
Attached File  day48prob.gif ( 26.19K ) Number of downloads: 0
 
3 Jul 2013
EC has some Severe thunderstorm watch up for Southwestern Ontario Today.. lots of building clouds already.

QUOTE
London - Parkhill - Eastern Middlesex County
1:11 PM EDT Wednesday 03 July 2013
Severe thunderstorm watch for
London - Parkhill - Eastern Middlesex County issued

Potential for severe thunderstorms development this afternoon.

This is an alert to the potential development of severe thunderstorms with large hail, damaging winds or heavy rainfall..Monitor weather conditions and listen for updated bulletins.

Conditions are favourable for severe thunderstorm development this afternoon with torrential downpours as the main concern. Hail up to 2 centimetres and brief damaging wind gusts are also possible.

Attached File(s)
Attached File  son.png ( 35.48K ) Number of downloads: 0
 
11 Jun 2013
Have to watch if this pushes a bit more northeast into southwestern ontario.. latest SPC
Attached File(s)
Attached File  day2probotlk0600any.gif ( 28.09K ) Number of downloads: 5
Attached File  NAM_221_2013061106_F42_CREF_SURFACE.png ( 130.33K ) Number of downloads: 2
Attached File  NAM_221_2013061112_F42_CREF_SURFACE.png ( 118.46K ) Number of downloads: 2
 
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