162
FXUS01 KWBC 152005
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
304 PM EST MON DEC 15 2025
VALID 00Z TUE DEC 16 2025 - 00Z THU DEC 18 2025
...HEAVY SNOW OVER PARTS OF THE LAKES ERIE/ONTARIO COASTLINE ON
MONDAY NIGHT INTO TUESDAY...
...THERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE
PACIFIC NORTHWEST ON MONDAY...
..HEAVY SNOW FOR THE CASCADES AND NORTHERN ROCKIES
THE HIGH PRESSURE OVER THE EASTERN THIRD OF THE COUNTRY WILL
SLOWLY MOVE EASTWARD OUT OVER THE ATLANTIC BY WEDNESDAY.
UPPER-LEVEL ENERGY OVER THE LOWER GREAT LAKES WILL PRODUCE LIGHT
TO MODERATE SNOW DOWNWIND FROM LAKES ERIE/ONTARIO FROM MONDAY
NIGHT INTO TUESDAY MORNING. SEE THE WPC HEAVY SNOW DISCUSSION FOR
DETAILS AND AMOUNTS.
MEANWHILE, A FRONT OVER THE PACIFIC NORTHWEST WILL MOVE EASTWARD
TO THE NORTHERN ROCKIES AND DISSIPATE BY TUESDAY EVENING. ONSHORE
FLOW OVER THE PACIFIC NORTHWEST WILL PRODUCE HEAVY RAIN MONDAY
NIGHT INTO TUESDAY MORNING. THEREFORE, THE WPC HAS ISSUED A SLIGHT
RISK (LEVEL 2/4) OF EXCESSIVE RAINFALL OVER THE PACIFIC NORTHWEST
THROUGH TUESDAY 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. A SECOND
FRONT MOVES OVER THE NORTHWEST OVERNIGHT TUESDAY, MOVING TO THE
NORTHERN PLAINS AND NORTHERN/CENTRAL ROCKIES BY WEDNESDAY EVENING.
THE RAIN WILL CONTINUE OVER THE NORTHWEST AND NORTHERN CALIFORNIA
THROUGH WEDNESDAY. AFTER THE ASSOCIATED FRONT MOVES OVER THE AREA,
MODERATE TO HEAVY SNOW WILL DEVELOP ACROSS PARTS OF THE CASCADES
AND NORTHERN ROCKIES THROUGH WEDNESDAY EVENING.
MOREOVER, AS THE SECOND FRONT MOVES ONTO THE NORTHERN PLAINS, RAIN
WILL DEVELOP OVER PARTS OF THE NORTHERN PLAINS ON WEDNESDAY
AFTERNOON AND EVENING. LASTLY, MOISTURE FROM THE GULF WILL START
TO STREAM NORTHWARD OVER THE SOUTHERN PLAINS, PRODUCING SCATTERED
SHOWERS AND THUNDERSTORMS OVER THE WESTERN GULF COAST OVERNIGHT
TUESDAY INTO WEDNESDAY.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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