Apr. 25-26 Southwest (So. Cal) Late Winter Storm, Unusually strong late winter storm could bring heavy rain Wed. night Options

[Beck]

Winter is still throwing one last punch at Southern California later this week, as an unusually strong late winter storm is forecast to bring potentially heavy rainfall and a chance of thunderstorms Wednesday night and Thursday. Models bring between 0.5" and 1.5" precipitation to the inland valleys.

A warming trend will take over next weekend.

This post has been edited by Beck: Apr 23 2012, 08:20 AM

[Artisane]

Everytime we make a post like this, we think it'll be the last storm of the season. =D

[Mike1014]

Special Weather Statement

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
410 PM PDT SUN APR 22 2012

CAZ042-043-048-050-055>058-060>062-231300-
ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS-
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
SAN DIEGO COUNTY VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS-
RIVERSIDE COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS-
SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS-
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-
410 PM PDT SUN APR 22 2012

...MORE WET WEATHER RETURNS TO SOUTHERN CALIFORNIA BY MIDWEEK...

ANOTHER PACIFIC STORM WILL TAKE AIM AT SOUTHERN CALIFORNIA
WEDNESDAY AFTERNOON THROUGH THURSDAY..WITH AMPLE MOISTURE AND
DECENT DYNAMICS ALOFT. ALTHOUGH THERE IS STILL SOME UNCERTAINTY
WITH THE TIMING...IT APPEARS THAT SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS MAY DEVELOP WEDNESDAY AFTERNOON OR EVENING...AHEAD
OF THE HEAVIEST PART OF THE STORM THAT WILL MOVE INLAND WEDNESDAY
EVENING OR WEDNESDAY NIGHT. PERIODS OF MODERATE TO HEAVY
PRECIPITATION WILL BE POSSIBLE.

RAINFALL AMOUNTS WILL MOST LIKELY BE HIGHLY VARIABLE...GIVEN THE
SHOWERY NATURE OF THE STORM. HOWEVER...IT APPEARS THAT RAINFALL
AMOUNTS WILL RANGE BETWEEN 0.5 AND 1.25 INCHES WEST OF THE
MOUNTAINS AND BETWEEN 1.5 TO 2.5 INCHES IN THE MOUNTAINS. EVEN THE
DESERTS COULD SEE AROUND A HALF INCH OR MORE OF RAINFALL.

POSSIBLE IMPACTS...

* A PERIOD OF MODERATE TO HEAVY RAINFALL THAT MAY CAUSE LOCAL
FLOODING PROBLEMS IN POORLY DRAINED AREAS...MAINLY WEDNESDAY
EVENING OR WEDNESDAY NIGHT.

* THUNDERSTORMS...WITH PERIODS OF BRIEF HEAVY RAIN RATES...SMALL
HAIL...GUSTY AND ERRATIC WINDS AS WELL AS DANGEROUS CLOUD TO
GROUND LIGHTNING STRIKES.

* WATERSPOUTS OVER THE COASTAL WATERS.

* LIGHT ACCUMULATIONS OF SNOW AT THE HIGHER RESORTS ON THURSDAY.

GIVEN THE WARM NATURE OF THIS STORM...SNOW LEVELS WILL PRIMARILY
REMAIN ABOVE 7500 FEET FOR THE BRUNT OF THE SYSTEM...BUT FALL TO
AROUND 6500 FEET BY THURSDAY. THEREFORE...ANY HEAVY SNOWFALL WILL
MOST LIKELY BE CONFINED TO THE HIGHEST PEAKS OF THE SAN BERNARDINO
MOUNTAINS...WITH ONLY LIGHT ACCUMULATIONS OF SNOW POSSIBLE AT
RESORT LEVELS DURING THE DAY ON THURSDAY.

THIS STORM WILL MOVE RAPIDLY EAST OF THE REGION ON THURSDAY OR
THURSDAY NIGHT...WITH SOME LINGERING LIGHT SHOWERS POSSIBLE INTO
FRIDAY MORNING.

STAY TUNED TO NOAA WEATHER RADIO...THE NATIONAL WEATHER SERVICE
WEBSITE AT WEATHER.GOV/SANDIEGO...OR LOCAL MEDIA FOR UPDATES.

$$

PALMER

After the last 2-3 storms this month managing only a few hundredths of rain here in the low deserts, I'm definitely looking forward to this wet storm. We need some relief from this weekend's 103-107 degree temperatures here so early in the season! Yeesh! A good quarter to half inch would be welcome out here.

[Jet Developer]

Given the trend of the last few springs, I would not be surprised to see a few more storms in May, with a potential for low snow levels, and possibly a decent soaker in early June.

One of the more interesting things about this storm - will Thursday be warmer at the beaches than it was anytime last Friday or Saturday while the deserts were roasting? I've seen storms hit Eureka in summer before and knocking out the marine layer raising highs from the usual upper 50s/low 60s, to around 70 degrees.

This post has been edited by Jet Developer: Apr 22 2012, 07:25 PM

[vb3347]

After the last 2-3 storms this month managing only a few hundredths of rain here in the low deserts, I'm definitely looking forward to this wet storm. We need some relief from this weekend's 103-107 degree temperatures here so early in the season! Yeesh! A good quarter to half inch would be welcome out here.

You can say that again!

I still haven't gotten to 1/2" for 2012 (currently at 0.47"). This could very well be our wettest storm of the 2011-12 season (so far, the honor belongs to the mid-September monsoon storm which dumped 0.33" at my house).

[LALEO]

If this front has a nice subtropical tap like they say, These totals could be underdone for my area. We had a storm like this in I believe October a few years back, An early storm, but it was very similar and ended up dumping over 4" of rain. Of course I don't expect those totals, but I would not be surprised if there are totals that were not expected. Either way, A nice storm indeed...Of course things could change for the better (wetter), or worse (Drier) before then..So we'll see!!

[Jet Developer]

Today was a day of RECORD HEAT and RECORD COLD. Where else in the world does that happen?

CODE

SXUS76 KSGX 230047
RERSGX

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
540 PM PDT SUN APR 22 2012

...HIGHEST MAXIMUM TEMPERATURE RECORDS BROKEN OR TIED ON APRIL 22...

LOCATION           NEW RECORD       OLD RECORD      PERIOD OF RECORD

CAMPO COOP             88           85 IN 2002         SINCE 1948
IDYLLWILD              84           79 IN 2009         SINCE 1943
THERMAL               104          103 IN 1997         SINCE 1950

...HIGHEST MINIMUM TEMPERATURE RECORDS BROKEN OR TIED ON APRIL 22...

LOCATION           NEW RECORD       OLD RECORD      PERIOD OF RECORD

BORREGO                80           67 IN 2009         SINCE 1942
PALOMAR MOUNTAIN       62           62 IN 1949         SINCE 1901
PALM SPRINGS           71           70 IN 1997         SINCE 1906
YORBA LINDA            59           57 IN 1940         SINCE 1912

...LOWEST MAXIMUM TEMPERATURE RECORDS BROKEN OR TIED ON APRIL 22...

LOCATION           NEW RECORD       OLD RECORD      PERIOD OF RECORD

LAGUNA BEACH           60           60 IN 1967         SINCE 1928

Conversation between two Californians and someone who does not know about California microclimates.

Non-Californian: (To Californians 1 and 2) So how did you guys enjoy the heat wave this weekend?

Californian 1: What heat wave? It was overcast, drizzly, and freezing all weekend long. Not a single peak of the Sun. It was the coldest weekend we had this entire winter/spring.

Californian 2: Oh boy, was it hot? I can't stand it. Could this be a preview of a unbearable summer?

Non-Californian: One of you is not telling the truth.

This post has been edited by Jet Developer: Apr 23 2012, 12:08 AM

[LALEO]

Conversation between two Californians and someone who does not know about California microclimates.

Non-Californian: (To Californians 1 and 2) So how did you guys enjoy the heat wave this weekend?

Californian 1: What heat wave? It was overcast, drizzly, and freezing all weekend long. Not a single peak of the Sun. It was the coldest weekend we had this entire winter/spring.

Californian 2: Oh boy, was it hot? I can't stand it. Could this be a preview of a unbearable summer?

Non-Californian: One of you is not telling the truth.

Haha, Hilarious, BUT.....Very true!

The EXACT same thing can be said with rainfall totals. Haha

[Beck]

Rain chances for Friday have disappeared, and now appear mainly for Wednesday and Thursday morning. Also, widespread drizzle has occurred this morning around the Temecula Valley and produced measurable precipitation in many spots this morning, and are as follows (as of 6:22 AM):

CODE

De Luz: 0.05"
Fallbrook: 0.03"
Moreno Valley: 0.03"
French Valley: 0.02"
Riverside: 0.02"
Hemet: 0.01"
San Bernardino: 0.01"
San Diego (City Heights): 0.01"
Simi Valley: 0.01"

[Artisane]

ML pushed all the way to the desert floor this morning in Palmdale. There was almost no wind, which allows the clouds to sink to the valley floor instead of being blown into haze.

[Jet Developer]

Today will be one heck of a bone-chilling day. Marine layer looks at least 5000 ft deep and the cloud bases are down to 500 ft. That's a 4500 ft thick cloud layer.

[Jet Developer]

Still raining here at 10 am. This is a marine layer on steroids. 60 degrees will be tough to reach today.

[alxz310]

Picked up 0.05" of ML precip overnight. Also, I wonder if there will be reverse clearing today as the visible satellite sort of seems to be hinting at that.

[alxz310]

What the heck... 12Z GFS only outputs 0.05" of rain, down from .77" in the last run .... OK... looks like an outlier for no

[Jet Developer]

Last summer we had the following:

May Gray
June Gloom
July Where's the Sky
August Disgust
September December

What's something ugly that rhymes with April?

Also, I think there was an earthquake about a minute ago. Earthquake weather?

This post has been edited by Jet Developer: Apr 23 2012, 12:39 PM

[Artisane]

looking towards Palmdale from Mojave, I can see that the ML isn't burning off AT ALL. It shouldn't be visible at this time of the day.

There's also some tropical moisture coming over the mountains with some nice clouds developing.

Edit: The wind is really localized, but where its happening, its strong. Lake Palmdale has had sustained winds over 35mph with gusts over 50mph all morning, while Plant 42 over in the valley just a vew miles away has been mostly calm and light all morning

This post has been edited by Artisane: Apr 23 2012, 01:47 PM

[Beck]

Also, I think there was an earthquake about a minute ago. Earthquake weather?

This appears to be what you felt. I'm in San Diego County this morning so I didn't feel anything.

[Jet Developer]

Wow, still no sign of clearing anywhere at all West of the mountains except for the very far inland areas of San Diego County

[Jet Developer]

Beaumont has taken a massive 30 degree drop from the toaster to the fridge - 88 F yesterday, 58 F today.

[Artisane]

Beaumont has taken a massive 30 degree drop from the toaster to the fridge - 88 F yesterday, 58 F today.

This summer will be either summer or winter, sometimes a day apart.

This cold PDO is just going to dominate again.