923
FXUS01 KWBC 271914
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
213 PM EST WED DEC 27 2023
VALID 00Z THU DEC 28 2023 - 00Z SAT DEC 30 2023
...WINTER STORM OVER THE CENTRAL U.S. CONTINUES TO WEAKEN AND MOVE
EAST, HOWEVER AREAS OF UNSETTLED WEATHER PERSIST...
...HEAVY RAIN AND FLOODING EXPECTED FOR PORTIONS OF THE NORTHERN
MID ATLANTIC AND NORTHEAST COASTS TONIGHT...
...UNSETTLED WEATHER LINGERS NEAR THE WEST COAST FOR THE NEXT
COUPLE OF DAYS...
...BELOW-AVERAGE TEMPERATURES TO SHIFT ACROSS THE SOUTHEASTERN
U.S. LATER THIS WEEK...
THE BROAD AREA OF LOW PRESSURE RESPONSIBLE FOR WIDESPREAD WINTER
IMPACTS, INCLUDING BLIZZARD CONDITIONS ACROSS PORTIONS OF THE
PLAINS EARLIER THIS WEEK, WILL CONTINUE TO GRADUALLY WEAKEN AND
MOVE EAST FROM THE MID MISSISSIPPI VALLEY TO THE OHIO VALLEY.
THIS WILL BRING AREAS OF MIXED PRECIPITATION FROM THE MID
MISSISSIPPI VALLEY THOUGH THE OHIO VALLEY AND INTO THE CENTRAL AND
SOUTHERN APPALACHIANS OVER THE NEXT COUPLE OF DAYS. SOME HEAVIER,
BUT BRIEF, SNOWFALL MAY OCCUR NEAR THE UPPER LOW AS IT DRIFTS
ACROSS THE MID MISSISSIPPI VALLEY THIS EVENING. HOWEVER, EXPECT
MOST OF THE AREAS IMPACTED TO SEE ONLY MINOR SNOW ACCUMULATIONS.
IN THE EAST, RAIN WILL CONTINUE TO SPREAD THROUGH THE MID ATLANTIC
AND NORTHEAST. A COASTAL LOW STRENGTHENING AND TRACKING NORTH
ALONG THE NORTHERN MID ATLANTIC AND NORTHEAST COASTS IS EXPECTED
TO HELP FOCUS HEAVIER RAINS FROM THE NORTHERN DELMARVA TO SOUTHERN
NEW YORK AND NEW ENGLAND TONIGHT INTO EARLY THURSDAY. THESE RAINS
MAY PRODUCE EXCESSIVE RUNOFF, RESULTING IN THE FLOODING OF RIVERS,
CREEKS, STREAMS, AND OTHER LOW-LYING AND FLOOD-PRONE LOCATIONS.
ONSHORE WINDS ALONG WITH ASTRONOMICAL HIGH TIDE ARE EXPECTED TO
PRODUCE MINOR COASTAL FLOODING ALONG VULNERABLE WATERFRONT AND
SHORELINE AREAS IN THE NEW YORK CITY METRO.
WITH NO COLD AIR IN PLACE, THIS WILL BE AN ALL RAIN EVENT FOR MOST
OF THE NORTHEAST. MAINE IS FORECAST TO BE EXCEPTION, WHERE THE
COLD AIR BEHIND A SLOW-MOVING FRONTAL BOUNDARY WILL SUPPORT SOME
MIXED PRECIPITATION, WITH LIGHT SNOW AND ICING EXPECTED.
MEANWHILE, MOISTURE WELL AHEAD OF A COUPLE OF LARGE PACIFIC
CYCLONES IS FORECAST TO PRODUCE UNSETTLED WEATHER ALONG THE WEST
COAST FOR THE NEXT COUPLE OF DAYS. THESE SYSTEMS WILL GENERATE
RAIN AND HIGH ELEVATION SNOW OVER THE PACIFIC NORTHWEST AND
CALIFORNIA, WHILE MUCH OF THE REMINDER OF THE WESTERN U.S. IS
FORECAST TO REMAIN DRY.
BELOW-AVERAGE TEMPERATURES ARE FORECAST FOLLOW A COLD FRONT MOVING
FROM THE SOUTHERN PLAINS AND THE LOWER MISSISSIPPI VALLEY TODAY
THROUGH THE SOUTHEAST LATER THIS WEEK. ELSEWHERE, TEMPERATURES
ARE EXPECTED TO REMAIN SEASONAL TO ABOVE-AVERAGE THROUGH THE
PERIOD.
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