223
FXUS01 KWBC 282000
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
259 PM EST THU DEC 28 2023
VALID 00Z FRI DEC 29 2023 - 00Z SUN DEC 31 2023
...SNOW OVER PARTS OF THE MIDDLE MISSISSIPPI/OHIO VALLEYS MOVING
INTO THE NORTHERN/CENTRAL APPALACHIANS AND NORTHEAST...
..RAIN/FREEZING RAIN OVER PARTS OF NORTHERN MAINE
...THERE IS A MARGINAL RISK OF EXCESSIVE RAINFALL OVER PARTS OF
NORTHERN CALIFORNIA...
AN UPPER-LEVEL LOW OVER PARTS OF THE MIDDLE MISSISSIPPI AND OHIO
VALLEYS SLOWLY WEAKENS AND MOVES TO THE GULF OF MAINE BY SATURDAY
EVENING. THE SYSTEM WILL PRODUCE LIGHT SNOW OVER PARTS OF THE
MIDDLE MISSISSIPPI/OHIO VALLEYS, WITH RAIN EXTENDING EASTWARD TO
THE NORTHEAST FROM PARTS OF THE GREAT LAKES. OVERNIGHT THURSDAY
INTO FRIDAY AFTERNOON, AN AREA OF RAIN/FREEZING RAIN WILL DEVELOP
OVER PARTS OF NORTHERN MAINE.
ON FRIDAY, THE RAIN CONTINUES OVER PARTS OF THE GREAT LAKES INTO
THE NORTHEAST AS LIGHT SNOW MIGRATES ACROSS THE OHIO VALLEY.
DURING THE LATE AFTERNOON, RAIN WILL CHANGE OVER TO SNOW OVER
NORTHERN MAINE. SNOW WILL DEVELOP OVER THE NORTHERN/CENTRAL
APPALACHIANS FROM FRIDAY EVENING INTO SATURDAY. BY SATURDAY, THE
LIGHT SNOW WILL CONTINUE OVER PARTS OF THE NORTHERN/CENTRAL
APPALACHIANS.
MEANWHILE, A FRONT OVER THE EASTERN PACIFIC MOVES ONSHORE OVER THE
WEST COAST BY FRIDAY AND DISSIPATES BY SATURDAY. AHEAD OF THE
FRONT, MOISTURE FROM THE PACIFIC WILL MOVE ONSHORE, CREATING LIGHT
RAIN OVER PARTS OF THE PACIFIC NORTHWEST AND NORTHERN CALIFORNIA.
A PLUME OF MOISTURE WILL STREAM INTO NORTHERN CALIFORNIA FROM
FRIDAY INTO SATURDAY, PRODUCING MODERATE TO HEAVY RAIN. THEREFORE,
THE WPC HAS ISSUED A MARGINAL RISK OF EXCESSIVE RAINFALL OVER
PARTS OF NORTHERN CALIFORNIA FROM FRIDAY THROUGH SATURDAY MORNING.
THE ASSOCIATED HEAVY RAIN WILL CREATE LOCALIZED AREAS OF FLASH
FLOODING, AFFECTING AREAS THAT EXPERIENCE RAPID RUNOFF WITH HEAVY
RAIN.
OVERNIGHT FRIDAY, THE SNOW LEVELS WILL LOWER OVER THE SIERRA
NEVADA MOUNTAINS AS SNOW DEVELOPS OVER THE HIGHER ELEVATIONS ON
SATURDAY INTO SATURDAY EVENING. IN ADDITION, RAIN WILL CONTINUE
OVER THE NORTHWEST INTO SOUTHERN CALIFORNIA.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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