014
FXUS01 KWBC 032005
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
305 PM EST SUN DEC 03 2023
VALID 00Z MON DEC 04 2023 - 00Z WED DEC 06 2023
..HEAVY SNOW FOR NORTHERN NEW ENGLAND
...THERE IS A SLIGHT TO MODERATE RISK OF EXCESSIVE RAINFALL OVER
PARTS OF THE PACIFIC NORTHWEST THROUGH TUESDAY...
...TEMPERATURES WILL BE 15 TO 20 DEGREES ABOVE AVERAGE OVER PARTS
OF THE UPPER MIDWEST...
A ROBUST PLUME OF MOISTURE WILL STREAM INTO THE PACIFIC NORTHWEST
THROUGH TUESDAY. FOR THE REMAINDER OF SUNDAY INTO MONDAY, MOISTURE
WILL FLOW INTO THE NORTHWEST, PRODUCING HEAVY RAIN. THEREFORE, THE
WPC HAS ISSUED A SLIGHT RISK OF EXCESSIVE RAINFALL OVER THE
PACIFIC NORTHWEST THROUGH MONDAY MORNING. THE ASSOCIATED HEAVY
RAIN WILL CREATE MAINLY LOCALIZED AREAS OF FLASH FLOODING, WITH
URBAN AREAS, ROADS, AND SMALL STREAMS THE MOST VULNERABLE.
FURTHERMORE, ON MONDAY EVENING, THE LOW-LEVEL WIND WILL STREAM
MOISTURE INTO PARTS OF WASHINGTON STATE AT 50 KNOTS, PRODUCING
HEAVY RAIN. THEREFORE, THE WPC HAS ISSUED A MODERATE RISK OF
EXCESSIVE RAINFALL OVER PARTS OF WASHINGTON STATE FROM MONDAY INTO
TUESDAY MORNING. THE ASSOCIATED HEAVY RAIN WILL CREATE NUMEROUS
AREAS OF FLASH FLOODING. FURTHERMORE, MANY STREAMS MAY FLOOD,
POTENTIALLY AFFECTING LARGER RIVERS.
ON TUESDAY, THE PLUME OF MOISTURE WILL WEAKEN SLIGHTLY YET
CONTINUE TO PRODUCE HEAVY RAIN OVER PARTS OF THE PACIFIC
NORTHWEST. THEREFORE, THE WPC HAS ISSUED A SLIGHT RISK OF
EXCESSIVE RAINFALL OVER THE PACIFIC NORTHWEST ON TUESDAY INTO
TUESDAY EVENING. THE ASSOCIATED HEAVY RAIN WILL CREATE MAINLY
LOCALIZED AREAS OF FLASH FLOODING, WITH URBAN AREAS, ROADS, AND
SMALL STREAMS THE MOST VULNERABLE.
MOREOVER, AS THE SYSTEM ASSOCIATED WITH THE HEAVY RAIN MOVES
EASTWARD, HEAVY SNOW WILL DEVELOP OVER PARTS OF THE
NORTHERN/CENTRAL ROCKIES FROM SUNDAY EVENING INTO MONDAY EVENING.
OVERNIGHT MONDAY, THE SNOW WILL END OVER MOST OF THE ROCKIES AS
THE SYSTEM MOVES INTO THE MIDWEST.
MEANWHILE, A DEEP LOW OVER THE NORTHEAST WILL SLOWLY WEAKEN
THROUGH TUESDAY. THE SYSTEM WILL PRODUCE HEAVY SNOW OVER NORTHERN
NEW ENGLAND FROM SUNDAY EVENING TO MONDAY EVENING. THE SNOW WILL
CONTINUE THROUGHOUT NEW ENGLAND FROM MONDAY TO TUESDAY EVENING.
HOWEVER, THE SNOWFALL WILL BE LIGHTER DURING THIS TIME PERIOD.
IN ADDITION, A WEAKER SYSTEM OVER THE MIDDLE MISSISSIPPI VALLEY
WILL MOVE INTO THE SOUTHERN APPALACHIANS AND DISSIPATE OVERNIGHT
MONDAY. BY MONDAY AFTERNOON, THE STORM WILL PRODUCE LIGHT RAIN
FROM THE MIDDLE MISSISSIPPI VALLEY TO THE CENTRAL APPALACHIANS.
FURTHER, THE SYSTEM MOVING INTO THE MIDWEST ON MONDAY WILL PRODUCE
LIGHT SNOW OVER PARTS OF THE GREAT LAKES AND OHIO VALLEY MONDAY
EVENING INTO TUESDAY EVENING.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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