262
FXUS01 KWBC 281843
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
142 PM EST TUE NOV 28 2023
VALID 00Z WED NOV 29 2023 - 00Z FRI DEC 01 2023
...AREAS OF HEAVY LAKE-EFFECT SNOWFALL DOWNWIND OF THE GREAT LAKES
WILL CONTINUE THROUGH EARLY WEDNESDAY...
...BELOW AVERAGE TEMPERATURES CONTINUE FOR THE EAST COAST AND
SOUTH WITH FREEZE WARNINGS IN EFFECT FROM THE CENTRAL GULF COAST
AND FLORIDA PANHANDLE TO THE SOUTH CAROLINA LOWCOUNTRY...
...UNSETTLED WEATHER TO ARRIVE ACROSS PARTS OF CALIFORNIA AND THE
PACIFIC NORTHWEST LATE WEDNESDAY THROUGH THURSDAY...
...NEW STORM SYSTEM TO BRING THREAT OF HEAVY RAIN TO THE LOWER
MISSISSIPPI VALLEY BY THURSDAY...
PERSISTENT COLD NORTHWEST CYCLONIC FLOW OVER THE GREAT LAKES
REGION WILL CONTINUE TO PRODUCE AREAS OF HEAVY LAKE-EFFECT
SNOWFALL DOWNWIND OF LAKE ERIE AND LAKE ONTARIO GOING THROUGH
TONIGHT AND EARLY WEDNESDAY. ADDITIONAL SNOWFALL ACCUMULATIONS OF
AS MUCH AS 4 TO 8 INCHES CAN BE EXPECTED WITH LOCALLY HEAVIER
AMOUNTS. A FEW INCHES OF ADDITIONAL SNOWFALL CAN ALSO BE EXPECTED
DOWNWIND OF LAKE SUPERIOR AND LAKE MICHIGAN. HOWEVER, THE WINDS
SHOULD BEGIN TO SUBSIDE ACROSS THE GREAT LAKES REGION ON WEDNESDAY
AND THIS WILL ALLOW THE LAKE-EFFECT SNOWFALL THREAT TO DIMINISH.
MEANWHILE, COLD TEMPERATURES WILL BE IN PLACE ACROSS MANY AREAS OF
THE SOUTH AND MUCH OF THE EAST COAST FOR THE REMAINDER OF TODAY
AND INTO WEDNESDAY WITH MANY AREAS SEEING WELL BELOW NORMAL
TEMPERATURES. THE COLD AIR ACROSS AREAS OF THE SOUTH HAVE
NECESSITATED THE ISSUANCE OF FREEZE WARNINGS FOR TONIGHT ACROSS
PORTIONS OF THE CENTRAL GULF COAST AND FROM THE FLORIDA PANHANDLE
UP INTO THE SOUTH CAROLINA LOWCOUNTRY. LOW TEMPERATURES ACROSS
THESE AREAS WILL BE AS COLD AS THE MID TO UPPER 20S, ESPECIALLY
INLAND FROM THE COAST, WITH TEMPERATURES GENERALLY IN THE LOW 30S
ALONG THE IMMEDIATE COAST.
WARMER TEMPERATURES AND GENERALLY DRY CONDITIONS THOUGH ARE
EXPECTED FOR MANY AREAS OF THE PLAINS, MIDWEST, AND OHIO VALLEY ON
WEDNESDAY AND THURSDAY AS AN AIRMASS OF PACIFIC ORIGIN ADVANCES
EAST OUT OF THE INTERMOUNTAIN WEST AND ACROSS THE CENTER PART OF
THE COUNTRY. THIS WILL FACILITATE ABOVE NORMAL TEMPERATURES WITH
HIGHS REACHING INTO THE 40S AND 50S. BY LATE THURSDAY, MULTIPLE
COLD FRONTS WILL BE ARRIVING ACROSS AREAS OF THE SOUTHERN PLAINS,
AND THERE WILL BE THE DEVELOPMENT OF LOW PRESSURE NEAR THE RED
RIVER VALLEY OF THE SOUTH WHICH WILL BEGIN TO TAP GULF OF MEXICO
MOISTURE. THIS STORM SYSTEM WILL SET THE STAGE FOR DEVELOPING
AREAS OF SHOWERS AND THUNDERSTORMS ACROSS MUCH OF THE LOWER
MISSISSIPPI VALLEY. SOME OF THE THUNDERSTORMS NEAR THE NORTHWEST
GULF COAST MAY BE SEVERE LATER ON THURSDAY, AND THE STORM
PREDICTION CENTER HAS DEPICTED AREAS OF SOUTHEAST TEXAS AND
SOUTHWEST LOUISIANA IN A SLIGHT RISK OF SEVERE WEATHER WITH
CONCERNS FOR A FEW TORNADOES. LOCALLY A FEW INCHES OF RAIN WILL BE
POSSIBLE TOO, AND WHILE MOST OF THE RAIN SHOULD BE BENEFICIAL IN
NATURE, SOME ISOLATED URBAN FLOODING CONCERNS CANNOT BE RULED OUT.
ELSEWHERE, UNSETTLED WEATHER WITH SOME LIGHT TO MODERATE RAINFALL
CAN BE EXPECTED TO ARRIVE ACROSS COASTAL AREAS OF CALIFORNIA
BEGINNING ON WEDNESDAY AS A WEAK AREA OF LOW PRESSURE OFFSHORE
APPROACHES THE REGION AND BRINGS SOME PACIFIC MOISTURE INLAND.
SOME OF THIS MOISTURE AND ENERGY WILL MOVE INTO THE FOUR CORNERS
REGION ON THURSDAY. MORE WIDESPREAD INCLEMENT WEATHER WILL ALSO BE
ARRIVING ACROSS THE PACIFIC NORTHWEST ON THURSDAY AS A SERIES OF
PACIFIC COLD FRONTS AND ASSOCIATED AXIS OF STRONGER PACIFIC
MOISTURE TRANSPORT BEGINS TO ARRIVE. THIS WILL BRING AREAS HEAVY
RAIN TO THE COASTAL RANGES AND HEAVY SNOW TO THE CASCADES.
ORRISON
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