365
FXUS01 KWBC 250651
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
151 AM EST THU DEC 25 2025
VALID 12Z THU DEC 25 2025 - 12Z SAT DEC 27 2025
...THERE IS A MODERATE RISK OF EXCESSIVE RAINFALL OVER PARTS OF
SOUTHERN CALIFORNIA ON THURSDAY...
...HEAVY SNOW OVER PARTS OF THE SIERRA NEVADA MOUNTAINS, CASCADES,
NORTHERN INTERMOUNTAIN REGION, NORTHERN/CENTRAL ROCKIES, AND
NORTHEAST...
...UP TO 0.25 INCHES OF RAIN/FREEZING RAIN POSSIBLE OVER THE
PENNSYLVANIA...
LOW PRESSURE OVER THE OHIO VALLEY WILL MOVE EASTWARD OFF THE
NORTHEAST COAST BY THURSDAY EVENING. THE SYSTEM WILL USHER IN RAIN
OVER PARTS OF THE OHIO VALLEY TO THE MID-ATLANTIC BY CHRISTMAS.
ADDITIONALLY, SNOW WILL DEVELOP OVER PARTS OF THE NORTHEAST ON
THURSDAY. A SECOND LOW OVER THE UPPER MID-WEST THURSDAY EVENING
WILL MOVE OFF THE EASTERN SEABOARD BY SATURDAY. WITH THE SECOND
LOW, AN ICY WINTRY MIX OF FREEZING RAIN AND SLEET WILL CAUSE
HAZARDOUS TRAVEL CONDITIONS FROM MICHIGAN EASTWARD ACROSS MUCH OF
PENNSYLVANIA AND INTO THE MID-ATLANTIC. UP TO 0.25 INCHES OF
RAIN/FREEZING RAIN IS POSSIBLE OVER PARTS OF PENNSYLVANIA. SNOW
WILL ALSO DEVELOP OVER THE U P OF MICHIGAN. IN ADDITION, MODERATE
TO HEAVY SNOW WILL DEVELOP OVER NEW ENGLAND FRIDAY INTO SATURDAY
MORNING.
MEANWHILE, A BROAD PLUME OF MOISTURE WILL MOVE OVER CALIFORNIA,
WITH RAIN MOVING INTO CALIFORNIA AND THE GREAT BASIN. A STREAM OF
MOISTURE-LADEN AIR WILL PRODUCE HEAVY RAIN OVER CALIFORNIA ON
THURSDAY, WITH HEAVY RAIN DEVELOPING OVER PARTS OF SOUTHERN
CALIFORNIA. THEREFORE, THE WPC HAS ISSUED A MODERATE RISK (LEVEL
3/4) OF EXCESSIVE RAINFALL OVER PARTS OF SOUTHERN CALIFORNIA FROM
THURSDAY INTO FRIDAY MORNING. NUMEROUS FLASH FLOODING EVENTS ARE
POSSIBLE. IN ADDITION, MANY STREAMS MAY FLOOD, POTENTIALLY
AFFECTING LARGER RIVERS. THE FLOODING MAY INCLUDE DEBRIS FLOWS IN
OR NEAR RECENTLY BURNED AREAS. ADDITIONALLY, A SLIGHT RISK OF
EXCESSIVE RAINFALL WILL DEVELOP OVER NORTHERN/CENTRAL CALIFORNIA
AND INTO PARTS OF SOUTHERN NEVADA ON THURSDAY.
ON FRIDAY, THE HEAVY RAIN WILL CONTINUE OVER CALIFORNIA.
THEREFORE, THE WPC HAS ISSUED A SLIGHT RISK (LEVEL 2/4) OF
EXCESSIVE RAINFALL FROM FRIDAY INTO 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. MOREOVER, HEAVY SNOW WILL DEVELOP OVER
THE SIERRA NEVADA MOUNTAINS THROUGH SATURDAY. WHILE RAIN AND SNOW
AT THE HIGHEST ELEVATIONS WILL DEVELOP OVER THE GREAT BASIN AND
THE SOUTHWEST THROUGH SATURDAY.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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