709
FXUS01 KWBC 190736
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
236 AM EST FRI DEC 19 2025
VALID 12Z FRI DEC 19 2025 - 12Z SUN DEC 21 2025
...HEAVY SNOW OVER PARTS OF THE UP AND NORTHERN LP OF MICHIGAN AND
LAKES ERIE/ONTARIO COASTLINE...
..HEAVY SNOW FOR THE CASCADES AND NORTHERN ROCKIES
ĀTHERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE
PACIFIC NORTHWEST ON FRIDAY...
A FRONT EXTENDING FROM THE LOWER GREAT LAKES TO THE SOUTHEAST WILL
MOVE EASTWARD OFF THE EAST COAST BY FRIDAY EVENING. THE SYSTEM
WILL PRODUCE RAIN OVER PARTS OF THE NORTHEAST AND MID-ATLANTIC
THROUGH FRIDAY EVENING. UPPER-LEVEL ENERGY ASSOCIATED WITH THE
SYSTEM WILL PRODUCE LIGHT TO MODERATE SNOW OVER THE UP AND
NORTHERN LP OF MICHIGAN AND PARTS OF OHIO/CENTRAL
APPALACHIANS/NORTHEAST THROUGH SATURDAY MORNING. MODERATE TO HEAVY
SNOW WILL DEVELOP DOWNWIND FROM LAKES ERIE/ONTARIO ALSO THROUGH
SATURDAY MORNING. SEE THE WPC HEAVY SNOW DISCUSSION FOR DETAILS
AND AMOUNTS.
MEANWHILE, A FRONT OVER THE NORTHERN INTERMOUNTAIN REGION AND THE
PACIFIC NORTHWEST WILL MOVE EASTWARD INTO THE NORTHEAST,
MID-ATLANTIC, LOWER MISSISSIPPI VALLEY, AND SOUTHERN PLAINS BY
SUNDAY. THE STORM WILL PRODUCE RAIN AND HIGHER-ELEVATION SNOW
ACROSS THE PACIFIC NORTHWEST, NORTHERN INTERMOUNTAIN REGION, AND
NORTHERN ROCKIES THROUGH SUNDAY. RAIN AND THE HIGHEST-ELEVATION
SNOW WILL DEVELOP ACROSS PARTS OF CALIFORNIA THROUGH SUNDAY. IN
ADDITION, A PLUME OF MOISTURE WILL STREAM INTO NORTHERN
CALIFORNIA, PRODUCING HEAVY RAIN. THEREFORE, THE WPC HAS ISSUED A
SLIGHT RISK (LEVEL 2/4) OF EXCESSIVE RAINFALL THROUGH SATURDAY
MORNING. THE ASSOCIATED HEAVY RAIN WILL CREATE MAINLY LOCALIZED
AREAS OF FLASH FLOODING, WITH URBAN AREAS, ROADS, SMALL STREAMS,
AND BURN SCARS BEING THE MOST VULNERABLE.
ALONG THE ASSOCIATED WARM FRONT OVER THE NORTHERN PLAINS, AREAS OF
RAIN/FREEZING RAIN WILL DEVELOP THROUGH SATURDAY MORNING. LIGHT
TO MODERATE SNOW WILL ALSO DEVELOP OVER PARTS OF THE NORTHERN
PLAINS/UPPER MISSISSIPPI VALLEY THROUGH SATURDAY MORNING. AS THE
BOUNDARY MOVES OVER THE GREAT LAKES, MODERATE TO HEAVY SNOW WILL
DEVELOP OVER PARTS OF THE UPPER PENINSULA OF MICHIGAN FROM
SATURDAY INTO SUNDAY MORNING. FROM SATURDAY AFTERNOON TO SUNDAY
MORNING, LIGHT SNOW WILL RETURN DOWNWIND FROM THE GREAT LAKES AND
INTO PARTS OF THE NORTHEAST.
OVERNIGHT FRIDAY, A WAVE OF LOW PRESSURE WILL DEVELOP ALONG THE
FRONT OVER THE CENTRAL ROCKIES, PRODUCING LIGHT SNOW OVER THE
REGION THROUGH SUNDAY. ALONG WITH THE SYSTEM, LIGHT RAIN WILL
DEVELOP OVER PARTS OF THE GREAT BASIN FROM FRIDAY INTO SUNDAY
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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