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Feb. 23-25th Winter Storm Potential


Chicago Storm

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EURO is a bit SE of the 0z run, but still an ok hit for Chicago.

LOW develops a bit east then where the 0z had it, hence the farther east track.

SE MO-C. IL-C. IND-NE Ohio

The 12z Euro is actually a good amount south of the 00z...or at least there is less precip in the cold sector.

00z Euro had 1.14" liquid at ORD, but the 12z only has 0.34". Not trying to have too much of an IMBY-focus...but there are some significant changes for a timeframe that is usually the Euro's wheelhouse.

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The 12z Euro is actually a good amount south of the 00z...or at least there is less precip in the cold sector.

00z Euro had 1.14" liquid at ORD, but the 12z only has 0.34". Not trying to have too much of an IMBY-focus...but there are some significant changes for a timeframe that is usually the Euro's wheelhouse.

It shifted by about 100miles, but the cold side is also drier.

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EXTENDED FORECAST DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD

156 PM EST MON FEB 21 2011

VALID 12Z THU FEB 24 2011 - 12Z MON FEB 28 2011

...CONSIDERABLE SOLUTION SPREAD AND RUN-TO-RUN VARIABILITY ARE

EVIDENT IN THE SHORTWAVE PATTERN DETAILS AS EARLY AS DAY 4...WITH

THE 12Z GFS/CANADIAN MAINTAINING A SUBSTANTIALLY MORE SOUTHERN

TRACK WITH A CYCLONE APPROACHING THE APPALACHIANS... WHICH APPEARS

AT LEAST IN PART INFLUENCED BY CONVECTIVE GRID-SCALE FEEDBACK.

THUS...THEIR SOLUTIONS HAVE BEEN IGNORED IN FAVOR OF THE 12Z

UKMET/00-12Z ECMWF/GLOBAL ENSEMBLE MEANS WHICH HAVE THE LOW

PROGRESSING INTO THE OHIO VALLEY...OR ABOUT 275 NM FARTHER

NORTH...A HUGE DIFFERENCE FOR ONLY A DAY 4 PREDICTION. IF

TRUE...THE INGREDIENTS SHOULD COME TOGETHER FOR A SIGNIFICANT

WINTER STORM FROM KANSAS TOWARD MICHIGAN THURSDAY AND FRIDAY.

ELSEWHERE...THE 12Z GFS HAS MOVED MORE TOWARD THE MODEL CONSENSUS

WITH THE EVOLUTION OF A SMALL UPPER LOW OVER THE PACIFIC NORTHWEST

THURSDAY AND FRIDAY BEFORE DEVIATING SUFFICIENTLY FROM THE

CONSENSUS TO JUSTIFY A QUICK TRANSITION OR PREFERENCE TOWARD THE

GLOBAL ENSEMBLE MEANS FOR DAYS 4-7. CONFIDENCE AS A WHOLE REMAINS

ABOVE AVERAGE DAY 3...BEFORE FALLING TO BELOW AVERAGE DAYS 4-7.

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Time for spring.

Not until April 1st. There is some unfinished business to take care of. The last two Marches in downtown Toronto had no measurable snowfall. Time to fix that this year.

So far, the Euro has displayed some good consistency with this upcoming potential system. Let's see what happens once the energy comes ashore in a few days. Should be interesting!

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Have a sneaking suspicion that we may be caught between the severe weather and the bulk of the wintry precip. I guess there's still time and averaging the solutions would leave the door open, but that darn Euro is a big one to have against you.

Meh, I'm ready to move on. Winter for all intents and purposes is done for LAF. Lousy finish...awful.

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Why thank you

Whhhaattt? Sick of winter now, too?

Sick of the disappointments. Most areas of New England are in the 60-80" range, most areas of the northern Midwest are in the 50-70" range, and here we are with about 40-45" (with Pearson/downtown Toronto sill in the 30"s). In absolute terms we're doing better than last year, but relative to our neighbours to the E/W, it's almost a redux.

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Maybe this one :sun:

NAM looks wet

I will gladly take it! Although the track has me spooked. It may be wet...but will it turn out to be cold enough?

Its been a while since (if ever ) I can remember back to back blockbuster snowstorms. Could be a record month for Feb in SEMI if these next few storms work out in our favor....Knock on Wood!

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Not until April 1st. There is some unfinished business to take care of. The last two Marches in downtown Toronto had no measurable snowfall. Time to fix that this year.

So far, the Euro has displayed some good consistency with this upcoming potential system. Let's see what happens once the energy comes ashore in a few days. Should be interesting!

Mentally I agree with you but emotionally the disappointments are starting to dishearten me. Honestly though, it's not just sour grapes that's making me say this; I think Thursday-Friday is rain for us.

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for those interested, the track of the sfc low on the 12z Euro for the monster after this one..

168hr- two 996mb contours, one in southern OK with the other from the northern TX PH into sw KS

174hr- 992mb over northern AR

180hr- 984mb over extreme southern IL

186hr- 976mb over extreme nw OH

192hr- 968mb over lake huron.

A BOMB.

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for those interested, the track of the sfc low on the 12z Euro for the monster after this one..

168hr- two 996mb contours, one in southern OK with the other from the northern TX PH into sw KS

174hr- 992mb over northern AR

180hr- 984mb over extreme southern IL

186hr- 976mb over extreme nw OH

192hr- 968mb over lake huron.

A BOMB.

Thats the problem

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for those interested, the track of the sfc low on the 12z Euro for the monster after this one..

168hr- two 996mb contours, one in southern OK with the other from the northern TX PH into sw KS

174hr- 992mb over northern AR

180hr- 984mb over extreme southern IL

186hr- 976mb over extreme nw OH

192hr- 968mb over lake huron.

A BOMB.

Who has blizzard conditions? and who is the jackpot for snow?

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DTX AFD..

THE BIG QUESTION DURING THE LATTER HALF OF THE WEEK CONTINUES TO

REVOLVE AROUND THE TRACK AND STRENGTH OF THE SYSTEM MOVING IN FROM

THE SOUTHERN PLAINS. THIS SYSTEM, CURRENTLY OFF THE WEST COAST, IS

SHOWN TO TRACK ALL THE WAY SOUTH TOWARD BAJA BEFORE MOVING INLAND

THROUGH THE SOUTHERN PLAINS, SO A LOT CAN HAPPEN DURING THAT JOURNEY

THAT WILL LEAD TO TIMING, TRACK, AND INTENSITY ADJUSTMENTS. EVIDENCE

SO FAR DOES SUPPORT MODEL SOLUTIONS THAT OFFER A SURFACE LOW TRACK

NORTH OF THE OHIO RIVER THURSDAY NIGHT INTO FRIDAY. A MORE NORTHWARD

TRACK IS FAVORED AS THE SYSTEM IS DEEPENING WITH TIME AS IT MOVES

OUT OF THE SOUTHERN PLAINS INTO SOUTHERN INDIANA BY THURSDAY NIGHT.

THERE IS ALSO THE LARGE SCALE PATTERN OF HEIGHT FALLS OVER THE

PACIFIC NORTHWEST AND CENTRAL CANADA TO INFLUENCE THE SHORT WAVE

TRACK ALOFT, ALONG WITH A RELATIVELY DIFFUSE PRE-EXISTING LOW LEVEL

BAROCLINIC ZONE NOT OFFERING MUCH RESISTANCE TO SURFACE PRESSURE

FALLS TOWARD THE GREAT LAKES REGION. CONSIDERING THESE THINGS, A

SYSTEM TRACK NORTH OF THE OHIO RIVER SEEMS REASONABLE WITHOUT EVEN

MENTIONING THE PROBLEMS THE GFS SOLUTION HAS WITH GRID SCALE

CONVECTIVE CONTAMINATION IN ITS SURFACE PRESSURE SOLUTION. ALL OF

THAT BEING SAID, AND GIVEN THE SYSTEM IS STILL OFF THE WEST COAST,

PREFER ANOTHER CYCLE OR TWO OF DATA GATHERING BEFORE RAMPING UP

TO THE SCENARIO OFFERED BY THE ECMWF, WHICH WOULD MEAN ANOTHER

SIGNIFICANT WINTER WEATHER EVENT FOR SE MICHIGAN.

A 2 day break then Bang! :thumbsup:

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