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December 20-22 Winter Storm (Blizzard?) Potential


Hoosier

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DTX:

DIGGING TROUGH APPROACHING CALIFORNIA THIS AFTERNOON...MOVING

THROUGH THE FOUR CORNERS REGION TOMORROW...AND BEGINNING TO TAP THE

SUBTROPICAL JET...WITH GULF OF MEXICO MOISTURE THEN SURGING

NORTHWARD WEDNESDAY NIGHT. 12Z MODEL CONSENSUS

(NAM/GFS/CANADIAN/UKMET/NOGAPS) AND GFS ENSEMBLE MEMBERS ARE IN

QUITE GOOD AGREEMENT (MINUS EURO)...WITH A DEEPENING SURFACE LOW

TRACK WEST NEAR/THROUGH CHICAGO AREA THURSDAY MORNING...COMFORTABLY

WEST OF SOUTHEAST MICHIGAN. WITH NO SIGNIFICANT HIGH TO OUR NORTH

(ONTARIO) AND NO SNOW COVER IN PLACE...THINKING WARM AIR SHOULD HAVE

LITTLE TROUBLE MAKING INROADS INTO THE STATE AS DEEP SOUTHWEST FLOW

RAMPS ON...AND THEN DUE SOUTHERLY FLOW AS THE TROUGH AXIS ATTEMPT TO

BECOME NEGATIVELY TILTED. THIS WILL ALLOW FOR THE COLD AIR TO COME

IN FROM THE SOUTHWEST LATE THURSDAY...USHERED IN BY 50 KNOTS AT

925-850 MB...AND WIND GUSTS OF 45 MPH ARE CERTAINLY IN

PLAY...ESPECIALLY TOWARD THE OHIO BORDER. WRAP AROUND MOISTURE AND

LAKE ENHANCEMENT APPEARS LIKELY THURSDAY NIGHT INTO FRIDAY AS 500 MB

LOW TRAVERSES THROUGH SOUTHERN LOWER MICHIGAN...AND A 1 TO 3 INCH

SNOWFALL APPEARS POSSIBLE ACROSS SOUTHEAST MICHIGAN. THIS IS IN

ADDITION TO ANY ACCUMULATION NORTH OF I-69 WEDNESDAY NIGHT INTO

THURSDAY...AS COLDEST SOLUTION...12Z EURO...WOULD ARGUE FOR

SIGNIFICANT ACCUMULATION...BUT LOW LEVEL BAROCLINIC ZONE IS VERY

TIGHT...AND WITH SOME LOW LEVEL EASTERLY COMPONENT OFF THE STILL

RELATIVELY MILD LAKE HURON...FAVOR A TRANSITION TO COLD RAIN OR

DIFFICULT TIME FOR SNOW TO ACCUMULATE WITH SURFACE DEW PTS CREEPING

ABOVE 32 DEGREES. IT SHOULD STILL BE NOTED OUR LOCAL WRF-GLOBAL ALSO

FAVORS A EURO TYPE TRACK/SOLUTION...AND THUS MIDLAND/BAY/SAGINAW

COUNTIES WOULD BE THE COUNTIES TO WORRY ABOUT FOR SUBSTANTIAL

SNOWFALL ACCUMULATIONS. OBVIOUSLY...CONFIDENCE IS NOT HIGH UNTIL

MAJORITY OF THE PACIFIC ENERGY COMES ONSHORE TOMORROW.

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Is this ensamble even further south than previous? I read talk of it tracking just near St Louis. Seems even further SE...

Not sure on that, but the link below does show the ECMWF ENS mean is indeed the farthest SE currenty.

Compare and contrast...though it may be partly a speed issue. Euro ensembles the farthest south/east.

http://raleighwx.ame...f072850mbT.html

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Is this ensamble even further south than previous? I read talk of it tracking just near St Louis. Seems even further SE...

It is definitely further SE than the 00z ensembles were. Allan Huffmans model page is good, but its in 24-hr increments, so you have to basically draw the line yourself for exact track. The 00z mean tracked it approximately over Detroit, and the 12z mean tracks it approximately a little south of Findlay, OH.

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