396
FXUS01 KWBC 150801
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT SUN OCT 15 2023
VALID 12Z SUN OCT 15 2023 - 12Z TUE OCT 17 2023
...DEPARTING DEEP STORM WILL USHER COOLER AND DAMP AUTUMN WEATHER
THROUGHOUT THE EASTERN HALF OF THE COUNTRY WITH AREAS OF SHOWERS
LINGERING OVER THE NORTHEAST, LOWER GREAT LAKES, OHIO VALLEY, AND
INTO SOUTHERN APPALACHIANS...
...WARM AND DRY ACROSS MUCH OF THE WESTERN U.S. BUT RAINY
CONDITIONS CONTINUE OVER THE PACIFIC NORTHWEST...
AN EXPLOSIVELY DEEPENING LOW PRESSURE SYSTEM OFF THE COAST OF THE
NORTHERN MID-ATLANTIC EARLY THIS SUNDAY MORNING WILL CONTINUE TO
MOVE OUT TO SEA. HEAVY RAIN AND EMBEDDED THUNDERSTORMS ASSOCIATED
WITH THIS SYSTEM ARE EXPECTED TO STAY OFFSHORE AND MOVE FARTHER
AWAY FROM THE EAST COAST. IN THE WAKE OF THE DEEP STORM, MUCH OF
THE EASTERN HALF OF THE COUNTRY WILL BE UNDER THE INFLUENCE OF A
COOL, EXPANSIVE, BUT UNSTABLE AIR STREAM FROM NORTH. BREEZY TO
WINDY CONDITIONS ARE EXPECTED TO PREVAIL ACROSS A BIG CHUNK OF THE
CENTRAL TO EASTERN U.S. AT LEAST THROUGH MONDAY WITH AREAS OF RAIN
SHOWERS THAT TEND TO LINGER OVER NEW ENGLAND AND THE LOWER GREAT
LAKES WHERE INSTABILITY WILL BE GREATEST DUE TO LINGERING
UPPER-LEVEL TROUGHING PIVOTING SOUTHWARD FROM EASTERN CANADA.
SOME OF THE RAIN IS FORECAST TO PUSH SOUTHWARD INTO THE OHIO
VALLEY AND TOWARD THE SOUTHERN APPALACHIANS WITH LINGERING
CLOUDINESS FOR A COUPLE MORE DAYS. THIS COOL AND DAMP WEATHER
REGIME SHOULD BEGIN TO BREAK DOWN BY MONDAY NIGHT INTO EARLY
TUESDAY WHEN WINDS ARE FORECAST TO BEGIN TO SUBSIDE AND SHOWERS
BEGIN TO TAPER OFF. MEANWHILE, PARTLY SUNNY CONDITIONS CAN BE
EXPECTED ALONG THE EAST COAST AS AIR SLIDING DOWN THE EASTERN
SLOPES OF THE APPALACHIANS HELPS WARMING AND DRYING OUT THE COOL
AND DAMP AIR MASS SOMEWHAT.
MEANWHILE, A COOL BUT DRY COUPLE OF DAYS ARE IN STORE THROUGH THE
MID-SECTION OF THE COUNTRY UNDER THE INFLUENCE OF A HIGH PRESSURE
RIDGE. IN CONTRAST, WARM AND DRY WEATHER WILL CONTINUE THROUGH
MUCH OF THE WESTERN U.S. FOR THE NEXT FEW DAYS. THE EXCEPTION
WILL BE ACROSS THE PACIFIC NORTHWEST AND INITIALLY NEAR COASTAL
NORTHERN CALIFORNIA WHERE RAINY AND WINDY CONDITIONS ARE EXPECTED
TO CONTINUE. SOME OF THE RAIN IS FORECAST TO PENETRATE INLAND
INTO THE NORTHERN ROCKIES LATE MONDAY INTO EARLY TUESDAY AS A COLD
FRONT AND THE ASSOCIATED UPPER TROUGH ADVANCE TOWARD THE NORTHERN
HIGH PLAINS.
KONG
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