572
FXUS01 KWBC 190644
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
144 AM EST THU DEC 19 2024
VALID 12Z THU DEC 19 2024 - 12Z SAT DEC 21 2024
...CLIPPER SYSTEM TO BRING PERIODS OF HEAVY SNOW TO THE UPPER
MIDWEST THURSDAY WITH SOME LIGHT TO MODERATE ACCUMULATIONS FOR THE
APPALACHIANS/INTERIOR NORTHEAST FRIDAY...
...WELL ABOVE AVERAGE TEMPERATURES AND MILD CONDITIONS CONTINUE
ACROSS THE WEST...
...FRONTAL PASSAGES WILL BRING COLDER TEMPERATURES TO MUCH OF THE
EASTERN U.S. THROUGH THE END OF THIS WEEK AND INTO THE WEEKEND...
A CLIPPER SYSTEM DROPPING EAST-SOUTHEASTERLY THROUGH THE NORTHERN
PLAINS AND INTO THE UPPER MIDWEST/GREAT LAKES WILL BRING PERIODS
OF HEAVY SNOW ALONG A PATH FROM CENTRAL MINNESOTA THROUGH NORTHERN
WISCONSIN AND INTO THE UP/NORTHERN LP OF MICHIGAN TODAY. WINTER
STORM WARNINGS ARE IN EFFECT FOR SNOW TOTALS GENERALLY BETWEEN
3-6", LOCALLY HIGHER. GUSTY WINDS MAY LEAD TO PERIODS OF BLOWING
SNOW AND HAZARDOUS TRAVEL CONDITIONS. ALTHOUGH SNOW HAS COME TO AN
END TO THE WEST OVER THE NORTHERN PLAINS, VERY GUSTY WINDS WILL
CONTINUE THROUGH THIS AFTERNOON. THE CLIPPER SYSTEM WILL CONTINUE
QUICKLY SOUTHEASTWARD ACROSS THE OHIO VALLEY, APPALACHIANS,
NORTHEAST, AND OFF THE EAST COAST FRIDAY, BRINGING WINTRY
PRECIPITATION TO THE INTERIOR AND SOME RAIN SHOWERS TO THE COAST.
SOME MODERATE SNOW ACCUMULATIONS WILL BE POSSIBLE ACROSS THE
CENTRAL APPALACHIANS AND DOWNWIND OF LAKE ERIE, WITH LIGHTER
AMOUNTS MORE BROADLY OVER THE INTERIOR NORTHEAST.
ELSEWHERE, A FEW LINGERING SHOWERS AND STORMS MAY OCCUR OVER SOUTH
FLORIDA THURSDAY, WITH CONDITIONS DRYING OUT INTO FRIDAY. AN
UPPER-LEVEL SHORTWAVE DROPPING SOUTHEASTWARD OVER THE NORTHERN
PLAINS MAY LEAD TO SOME RENEWED LIGHT SNOW CHANCES FRIDAY. AN
ACTIVE STORM TRACK OVER THE PACIFIC WILL ALSO BRING SOME PERIODS
OF LOWER ELEVATION/COASTAL RAIN AND PERHAPS SOME MOUNTAIN SNOW TO
THE PACIFIC NORTHWEST/NORTHERN CALIFORNIA THE NEXT COUPLE OF DAYS,
THOUGH TOTALS SHOULD REMAIN MUCH LIGHTER THAN EARLIER THIS WEEK.
TEMPERATURES ACROSS THE WEST WILL REMAIN WELL ABOVE AVERAGE BY
10-20 DEGREES FOR MOST LOCATIONS TO END THE WEEK AS UPPER-LEVEL
RIDGING REMAINS IN PLACE. FORECAST HIGHS GENERALLY RANGE IN THE
40S AND 50S ACROSS THE INTERIOR WEST, PACIFIC NORTHWEST, AND
NORTHERN CALIFORNIA WITH 60S TO LOW 80S FOR SOUTHERN CALIFORNIA
AND THE DESERT SOUTHWEST. A COOLING TREND IS EXPECTED FOR MUCH OF
THE EASTERN HALF OF THE COUNTRY FOLLOWING A COLD FRONTAL PASSAGE
OFF THE EAST COAST THIS MORNING AND AN ADDITIONAL COLD FRONT
DROPPING SOUTHWARD WITH THE CLIPPER SYSTEM. VERY COLD TEMPERATURES
IN THE TEENS ARE FORECAST FOR THE NORTHERN PLAINS/UPPER MIDWEST
TODAY. HIGHS WILL DROP INTO THE 20S AND 30S IN THE MIDWEST, THE
30S AND 40S IN THE MID-SOUTH AND CENTRAL PLAINS, AND THE 50S AND
60S IN TEXAS BY FRIDAY. HIGHS ALONG THE EAST COAST RANGE FROM THE
20S TO 40S IN NEW ENGLAND, THE 30S AND 40S IN THE MID-ATLANTIC,
AND THE 50S AND 60S IN THE SOUTHEAST. MUCH COLDER TEMPERATURES ARE
EXPECTED ALONG THE EAST COAST BY THIS WEEKEND.
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