388
FXUS01 KWBC 120733
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
233 AM EST TUE DEC 12 2023
VALID 12Z TUE DEC 12 2023 - 12Z THU DEC 14 2023
..LAKE EFFECT SNOW DOWNWIND OF GREAT LAKES BEGINNING TODAY
...HEAVY SNOW POTENTIAL ACROSS PARTS OF THE SOUTHERN ROCKIES/HIGH
PLAINS...
NORTHWESTERLY FLOW ON THE BACKSIDE OF A COLD FRONT WILL PRODUCE
SNOW DOWNWIND OF THE GREAT LAKES BEGINNING TODAY. SNOW WILL BEGIN
OVER EASTERN PORTIONS OF MICHIGAN'S UPPER PENINSULA THIS MORNING
AS THE COLD FRONT MOVES THROUGH THE UPPER GREAT LAKES. WHAT STARTS
OUT AS A WINTRY MIX DOWNWIND OF LAKES ERIE AND ONTARIO EARLY THIS
EVENING WILL QUICKLY SWITCH OVER TO ALL SNOW OVERNIGHT AS THE COLD
FRONT SWEEPS THROUGH THE LOWER GREAT LAKES AND NORTHEAST. LIGHT TO
MODERATE SNOW IS LIKELY WITH ABOUT 3-6 INCHES OF SNOW POSSIBLE FOR
AREAS DOWNWIND OF LAKE ONTARIO BY THURSDAY MORNING, WHICH IS WHEN
CONDITIONS ARE EXPECTED TO IMPROVE.
ELSEWHERE, AN AREA OF LOW PRESSURE IS EXPECTED TO DEVELOP BENEATH
AN AMPLIFYING UPPER LEVEL PATTERN AND PRODUCE MODERATE TO HEAVY
SNOW ACROSS PORTIONS OF THE SOUTHERN ROCKIES/HIGH PLAINS TONIGHT
THROUGH WEDNESDAY. BETWEEN 6-12 INCHES OF SNOW ARE POSSIBLE OVER
PORTIONS OF SOUTHERN COLORADO AND NORTHERN NEW MEXICO. THERE'S
STILL SOME UNCERTAINTY WITH THE TRACK OF THIS SYSTEM AND SNOW
LEVELS, WITH SOME ACCUMULATING SNOW POSSIBLE AS LOW AS 5,500 FEET
AND AS HIGH AS 7,500 FEET. SHOWERS AND THUNDERSTORMS ARE EXPECTED
OVER WESTERN TEXAS WHERE WARM MOIST SOUTHERLY FLOW GETS INTO THE
REGION.
TEMPERATURES WILL FALL 15-25 DEGREES BELOW AVERAGE BENEATH THE
DIGGING UPPER TROUGH OVER THE CENTRAL/SOUTHERN HIGH PLAINS ON
WEDNESDAY AND THURSDAY. A DOWNSTREAM RIDGE WILL SUPPORT ABOVE
AVERAGE TEMPERATURES FROM THE NORTHERN HIGH PLAINS TO THE UPPER
MIDWEST BEGINNING WEDNESDAY. A QUASI-STATIONARY FRONT WILL MEANDER
INTO SOUTHERN FLORIDA WHERE IT'LL GENERATE SCATTERED SHOWERS AND
THUNDERSTORMS BEGINNING WEDNESDAY.
KEBEDE
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