711
FXUS01 KWBC 091916
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
215 PM EST SAT DEC 09 2023
VALID 00Z SUN DEC 10 2023 - 00Z TUE DEC 12 2023
...SNOW FOR THE CASCADES AND NORTHERN INTERMOUNTAIN REGION AND
HEAVY SNOW OVER PARTS OF THE HIGHER ELEVATIONS OF NEW YORK
STATE/NORTHERN NEW ENGLAND ON SUNDAY...
...THERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE
PACIFIC NORTHWEST ON SATURDAY AND OVER PARTS OF NEW ENGLAND ON
SUNDAY...
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE LOWER MISSISSIPPI VALLEY TO THE SOUTHERN OHIO AND TENNESSEE
VALLEYS ON SATURDAY...
A FRONT EXTENDING FROM THE GREAT LAKES TO THE WESTERN GULF COAST
WILL SLOWLY MOVE OFF THE EASTERN SEABOARD BY MONDAY MORNING.
SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD OF THE
FRONT OVER PARTS OF THE GREAT LAKES/OHIO VALLEY TO THE CENTRAL
GULF COAST, WITH SOME THUNDERSTORMS BECOMING SEVERE. THEREFORE,
THE SPC HAS ISSUED A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER
PARTS OF THE LOWER MISSISSIPPI VALLEY TO THE SOUTHERN OHIO AND
TENNESSEE VALLEYS THROUGH SUNDAY MORNING. THE HAZARDS ASSOCIATED
WITH THESE THUNDERSTORMS ARE FREQUENT LIGHTNING, SEVERE
THUNDERSTORM WIND GUSTS, HAIL, AND A FEW TORNADOES.
ADDITIONALLY, SNOW WILL DEVELOP OVER THE NORTHWEST PORTION OF THE
STORMS OVER PARTS OF THE UPPER MISSISSIPPI VALLEY/UPPER GREAT
LAKES FROM SATURDAY EVENING INTO SUNDAY EVENING. IN ADDITION,
LIGHT SNOW WILL LINGER OVER PARTS OF THE GREAT LAKES ON MONDAY.
MOREOVER, MOISTURE FROM THE GULF OF MEXICO WILL POOL ALONG THE
BOUNDARY ON SUNDAY, PRODUCING HEAVY RAIN OVER PARTS OF THE
NORTHEAST. THEREFORE, THE WPC ISSUED A SLIGHT RISK OF EXCESSIVE
RAINFALL OVER NEW ENGLAND FROM SUNDAY INTO MONDAY MORNING. THE
ASSOCIATED HEAVY RAIN WILL CREATE MAINLY LOCALIZED AREAS OF FLASH
FLOODING, WITH URBAN AREAS, ROADS, AND SMALL STREAMS THE MOST
VULNERABLE. IN ADDITION, SHOWERS AND THUNDERSTORMS WILL DEVELOP
ALONG AND AHEAD OF THE FRONT OVER PARTS OF THE MID-ATLANTIC TO THE
SOUTHEAST AND CENTRAL GULF COAST.
ALSO, ON SUNDAY, AS COLD AIR MOVES OVER THE NORTHEAST, HEAVY SNOW
WILL DEVELOP OVER PARTS OF THE HIGHER ELEVATIONS OF NEW YORK STATE
AND NORTHERN NEW ENGLAND FROM SUNDAY EVENING INTO MONDAY.
MEANWHILE, A FRONT WILL MOVE ONSHORE OVER THE PACIFIC NORTHWEST
SATURDAY EVENING INTO SUNDAY. AHEAD OF THE FRONT, A PLUME OF
MOISTURE WILL STREAM INTO THE NORTHWEST ON SATURDAY INTO SUNDAY.
THE MOISTURE STREAMING INLAND WILL PRODUCE RAIN AND HIGH-ELEVATION
SNOW OVER PARTS OF THE PACIFIC NORTHWEST THROUGH SUNDAY AND SNOW
OVER THE NORTHERN INTERMOUNTAIN REGION FROM SATURDAY EVENING INTO
SUNDAY. THE MOISTURE WILL ALSO PRODUCE HEAVY RAIN OVER PARTS OF
THE NORTHWEST ON SATURDAY. THEREFORE, THE WPC HAS ISSUED A SLIGHT
RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE PACIFIC NORTHWEST
INTO SUNDAY MORNING. THE ASSOCIATED HEAVY RAIN WILL CREATE MAINLY
LOCALIZED AREAS OF FLASH FLOODING, WITH URBAN AREAS, ROADS, AND
SMALL STREAMS THE MOST VULNERABLE.
ON MONDAY, LIGHT SNOW WILL LINGER OVER PARTS OF THE NORTHERN
INTERMOUNTAIN REGION INTO THE NORTHERN ROCKIES, WHILE LIGHT RAIN
WILL CONTINUE OVER PARTS OF THE PACIFIC NORTHWEST.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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