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January 31-February 2 MAJOR Winter Storm


Powerball

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STL

AREA FORECAST DISCUSSION...UPDATED

NATIONAL WEATHER SERVICE ST LOUIS MO

830 PM CST SAT JAN 29 2011

UPDATE

/830 PM CST SAT JAN 29 2011/

THE 18Z RUNS AND FIRST GLANCE AT THE INCOMING 00Z NAM CONTINUE TO

ADVERTISE A VERY POWERFUL WINTER STORM IMPACTING THE REGION EARLY

THIS COMING WEEK. FREEZING DRIZZLE AND FREEZING RAIN WILL BEGIN AS

EARLY AS LATE SUNDAY NIGHT/EARLY MONDAY MORNING AND CONTINUE IN

WAVES THROUGH MONDAY EVENING. ICE ACCUMULATION DURING THIS PERIOD

WILL LIKELY STAY BELOW WARNING CRITERIA...UNDER A QUARTER OF AN

INCH.

PRECIPITATION INTENSITY WILL BE ON THE INCREASE MONDAY NIGHT THROUGH

TUESDAY NIGHT WITH SIGNIFICANT ICE AND SNOW/SLEET ACCUMULATION

FORECAST BY NEARLY ALL THE MODEL GUIDANCE. EXACT AMOUNTS/PLACEMENT

ARE STILL UP FOR DEBATE AND WILL DEPEND HIGHLY ON WHERE THE

TRANSITION FROM FREEZING RAIN...TO SLEET AND THEN TO SNOW LAYS OUT

ACROSS THE CWA.

SLU ANALOGS COMPARE THIS UPCOMING WINTER STORM TO THE 1982 SNOW

STORM THAT MANY REMEMBER IN ST. LOUIS AS THE BLIZZARD OF 82...AND

THE JANUARY 30 2006 ICE AND SNOW EVENT THAT LEFT NEARLY 500000

PEOPLE WITHOUT POWER FOR DAYS ACROSS EASTERN MISSOURI AND ILLINOIS.

THIS WINTER STORM HAS THE POTENTIAL TO PRODUCE CRIPPLING AMOUNTS OF

SLEET AND SNOW...IN EXCESS OF 12 INCHES...AND ICE ACCUMULATIONS IN

EXCESS OF 1/2 INCH. ICE ACCUMULATION OF THIS MAGNITUDE WOULD LEAD

TO POWER OUTAGES FROM DOWNED TREES AND POWER LINES.

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Man, LAF is on a razor thin margin. 2"+ of QPF, but some of that will undoubtedly be sleet, as it appears there's just enough heat aloft to do some melting. WAA is typically underdone somewhat, so I would expect that the 00Z NAM BUFKIT would be a +SNPL mix. Would still end up with anywhere between 10-16" of mixed sleet and snow though.

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Hopefully we dont end up like Paducah back in Jan 09'. Just a minor shift south (50 miles) and we could stay mostly snow. Still a long ways out. Were talking the 84hr NAM.

In reality, you need like 200 or more miles south. The mid levels are scorching in tandem with relatively "very" cold surface temps (<30º throughout the run). Not good, not good at all.

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I think the Beau Dodson's PAH area had ice amounts around 2 inches in their devastating storm in early 2009. Really serious. Worried if this verifies for Indpls on ne.

Yeah it was awful, Beau I recalled his blog trees snapping all around him. Large trees. That would be frightening to me to say the least... Whats this storm looking to do to So.Il as you experts can see??? Very curious to northern PAH counties will pan out :popcorn:

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In reality, you need like 200 or more miles south. The mid levels are scorching in tandem with relatively "very" cold surface temps (<30º throughout the run). Not good, not good at all.

Well I mean to just avoid all ice. Not to be all snow. I understand for the all snow scenario I'd need a decent shift south. Sorry for the confusion.

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Man, LAF is on a razor thin margin. 2"+ of QPF, but some of that will undoubtedly be sleet, as it appears there's just enough heat aloft to do some melting. WAA is typically underdone somewhat, so I would expect that the 00Z NAM BUFKIT would be a +SNPL mix. Would still end up with anywhere between 10-16" of mixed sleet and snow though.

Yep, I'd take it though. :)

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