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Feb. 26-Mar. 1st Winter Storm Potential


Chicago Storm

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I'm riding the Euro here just because i hate ice...

LA CROSSE

.LONG TERM...SUNDAY NIGHT THROUGH THURSDAY

THE ECMWF AND GFS CONTINUE TO SHOW DIFFERENT SOLUTIONS REGARDING THE

LOW TRACK ON SUNDAY NIGHT. THE GFS BRINGS THE SURFACE LOW ACROSS

EASTERN IOWA SUNDAY EVENING THEN ACROSS SOUTHERN WISCONSIN AFTER

MIDNIGHT. THIS TRACK WOULD RESULT IN A BAND OF HEAVY PRECIPITATION

STRETCHING FROM NORTHEAST IOWA THOUGH CENTRAL WISCONSIN. FORECAST

SOUNDINGS SUGGEST THAT THE PRECIPITATION WOULD FALL AS FREEZING

RAIN OR RAIN ACROSS MUCH OF THE FORECAST AREA SUNDAY EVENING...THEN

SWITCHING OVER TO SNOW AFTER MIDNIGHT. ON THE OTHER HAND THE ECMWF

TAKES THE LOW ACROSS MISSOURI SUNDAY NIGHT THEN INTO INDIANA ON

MONDAY. THE ECMWF SOUTHERN SOLUTION WOULD KEEP THE PRECIPITATION

AS SNOW AND CONFINED TO NORTHEAST IOWA AND FAR SOUTHWEST

WISCONSIN. HAVE CONTINUED WITH A MODEL CONSENSUS APPROACH GIVEN

THE DIFFERING SOLUTIONS...KEEPING HIGHER PRECIPITATION CHANCES

ACROSS CENTRAL WISCONSIN THROUGH NORTHEAST IOWA. THE LOW IS

EXPECTED TO EXIT THE REGION LATE ON MONDAY AS WEAK HIGH PRESSURE

BUILDS IN AND ZONAL FLOW ALOFT RETURNS. QUIET WEATHER IS EXPECTED

THROUGH WEDNESDAY. MODELS HINTING AT A TROUGH MOVING ACROSS THE

REGION ON THURSDAY...BRINGING THE POTENTIAL FOR ANOTHER ROUND OF

PRECIPTIATION.

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from DVN

THE 12Z GFS/GEM SUGGEST A MORE WESTERN TRACK OF THE SURFACE LOW TO THE WEST

OF THE CWA OR OVER THE WESTERN HALF SUNDAY NIGHT. THE ECMWF MOVES

THE SYSTEM JUST TO OUR SOUTHEAST MONDAY MORNING. I AM INCLINED TO

FAVOR THE ECMWF WITH FRESH AND PROBABLY DEEP SNOW COVER IN PLACE

OVER THE SRN CWFA IMPACTING THE LOW LEVEL BAROCLINIC ZONE WHICH

WOULD FAVOR A MORE SOUTHERN TRACK.

this the same office that said for days the current storm would come north due to lack of snow cover...so who knows

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from DVN

THE 12Z GFS/GEM SUGGEST A MORE WESTERN TRACK OF THE SURFACE LOW TO THE WEST

OF THE CWA OR OVER THE WESTERN HALF SUNDAY NIGHT. THE ECMWF MOVES

THE SYSTEM JUST TO OUR SOUTHEAST MONDAY MORNING. I AM INCLINED TO

FAVOR THE ECMWF WITH FRESH AND PROBABLY DEEP SNOW COVER IN PLACE

OVER THE SRN CWFA IMPACTING THE LOW LEVEL BAROCLINIC ZONE WHICH

WOULD FAVOR A MORE SOUTHERN TRACK.

from the other office in IA...DMX

CURRENT FEELING IS TO FAVOR THE NORTHERN MOST TRACK AS THINKING IS THAT

CONVECTIVE FEED BACK WILL REINFORCE THE NEGATIVE ORIENTATION OF THE

UPPER LEVEL TROUGH AND IF ANYTHING...DISPLACE THE VORT MAX FURTHER

TO THE NORTHEAST.

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from the other office in IA...DMX

CURRENT FEELING IS TO FAVOR THE NORTHERN MOST TRACK AS THINKING IS THAT

CONVECTIVE FEED BACK WILL REINFORCE THE NEGATIVE ORIENTATION OF THE

UPPER LEVEL TROUGH AND IF ANYTHING...DISPLACE THE VORT MAX FURTHER

TO THE NORTHEAST.

Very confusing. I wonder what they think when they see each others AFD's

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both 18z and 0z runs of the NAM are showing .25" liquid in northern IL during the day on saturday. LOT's afd mentioned a few inches were possible from this WAA snow.

It IS that Saturday stuff ahead of the main system that could have some implications for a few. See the current mess and what happened last night. Some of the models now have a stronger front runner on Saturday which naturally could suppress this event a little and or force it south some. The euro etc sort of hinted at this. It however has the strongest front runner and develops it well as it heads towards New England. Thus keep a eye out on the Saturday stuff. Basically i suspect this thing is not even close to being set in stone yet. Again see where this thing enters the Plains at as well.

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The Low on the GFS seems further south. The cold air seems so far north. It looks like models are starting to trend south again for the late weekend storm.

Note Saturday and how that is looking more impressive with each new run. That in turn has implications on this storm and thus the subtle shift south. Not saying this continues or is the final outcome but just to watch that system on Saturday and ofcourse where this one enters the plains at.

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