899
FXUS01 KWBC 170812
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
311 AM EST SUN DEC 17 2023
VALID 12Z SUN DEC 17 2023 - 12Z TUE DEC 19 2023
...THERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE
MID-ATLANTIC INTO NEW ENGLAND ON SUNDAY AND OVER NORTHERN NEW
ENGLAND ON MONDAY...
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE SOUTHERN MID-ATLANTIC COAST ON SUNDAY...
...LAKE-EFFECT SNOW DOWNWIND OF THE GREAT LAKES AND UPSLOPE SNOW
OVER PARTS OF THE NORTHERN/CENTRAL THROUGH TUESDAY...
A STRONG STORM IS MOVING ONSHORE OVER THE NORTHEASTERN PORTION OF
THE GULF COAST OF FLORIDA. THE AREA OF LOW PRESSURE WILL DEEPEN
RAPIDLY WHILE MOVING NORTHEASTWARD TO THE SOUTHERN MID-ATLANTIC
COAST BY SUNDAY EVENING. THE MAJOR SYSTEM WILL START TO PRODUCE
SHOWERS AND THUNDERSTORMS OVER PARTS OF THE SOUTHERN MID-ATLANTIC
COAST NORTHWARD TO NEW ENGLAND. THEREFORE, THE WPC HAS ISSUED A
SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE MID-ATLANTIC
INTO NEW ENGLAND 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.
IN ADDITION, THE STORM WILL PRODUCE SHOWERS AND SEVERE
THUNDERSTORMS OVER THE SOUTHERN MID-ATLANTIC COAST. THEREFORE, THE
SPC HAS ISSUED A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
EASTERN NORTH CAROLINA AND THE EASTERN SOUTHERN CAROLINA COAST
THROUGH MONDAY MORNING. THE HAZARDS ASSOCIATED WITH THESE
THUNDERSTORMS ARE FREQUENT LIGHTNING, SEVERE THUNDERSTORM WIND
GUSTS, FEW TORNADOES, AND A MINIMAL THREAT OF HAIL.
ON MONDAY THE STORM WILL MOVE FROM NORTHWARD INTO EASTERN CANADA
BY MONDAY EVENING. THE THREAT OF EXCESSIVE RAINFALL MOVES
NORTHWARD IN NORTHERN NEW ENGLAND. THEREFORE, THE WPC HAS ISSUED A
SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF NORTHERN NEW
ENGLAND FROM MONDAY THROUGH TUESDAY MORNING. THE ASSOCIATED HEAVY
RAIN WILL CREATE MAINLY LOCALIZED AREAS OF FLASH FLOODING, WITH
URBAN AREAS, ROADS, AND SMALL STREAMS THE MOST VULNERABLE.
THE THREAT OF SEVERE THUNDERSTORMS DECREASES SLIGHTLY ON MONDAY.
THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF NEW
ENGLAND FROM MONDAY THROUGH TUESDAY MORNING. THE HAZARDS
ASSOCIATED WITH THESE THUNDERSTORMS ARE FREQUENT LIGHTNING, SEVERE
THUNDERSTORM WIND GUSTS, AND A MINIMAL THREAT OF HAIL AND
TORNADOES.
MEANWHILE, UPPER-LEVEL ENERGY OVER THE GREAT LAKES/OHIO VALLEY
WILL PRODUCE LIGHT TO MODERATE SNOW OVER PARTS OF THE UPPER
MISSISSIPPI VALLEY AND MODERATE TO HEAVY SNOW OVER THE WESTERN
PORTION OF THE UPPER PENINSULA OF MICHIGAN FROM SUNDAY EVENING
INTO MONDAY. IN ADDITION, LAKE-EFFECT SNOW WILL DEVELOP DOWNWIND
OF THE GREAT LAKES AND UPSLOPE SNOW OVER PARTS OF THE
NORTHERN/CENTRAL APPALACHIANS ON MONDAY INTO TUESDAY. THE HEAVIEST
SNOW WILL BE OVER PARTS OF THE CENTRAL APPALACHIANS.
FURTHERMORE, A FRONT MOVING ONSHORE OVER THE WEST COAST ON MONDAY
WILL PRODUCE RAIN OVER PARTS OF THE PACIFIC NORTHWEST AND
CALIFORNIA COAST ON MONDAY INTO TUESDAY MORNING.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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