924
FXUS01 KWBC 231943
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
242 PM EST MON DEC 23 2024
VALID 00Z TUE DEC 24 2024 - 00Z THU DEC 26 2024
...LIGHT TO MODERATE SNOW OVER PARTS OF THE NORTHEAST MONDAY NIGHT
INTO TUESDAY; LIGHT TO MODERATE SNOW OVER THE SIERRA NEVADA
MOUNTAINS MONDAY NIGHT INTO TUESDAY...
...LIGHT RAIN/FREEZING RAIN OVER PARTS OF THE MID-ATLANTIC/CENTRAL
APPALACHIANS ON MONDAY EVENING INTO TUESDAY...
..MODERATE TO HEAVY RAIN OVER PARTS OF NORTHERN CALIFORNIA
A WAVE OF LOW PRESSURE OVER THE GREAT LAKES ON MONDAY WILL MOVE
NORTHEASTWARD OFF THE NORTHEAST COAST BY TUESDAY EVENING. THE
SYSTEM WILL PRODUCE LIGHT SNOW OVER PARTS OF MICHIGAN ON MONDAY
EVENING, ENDING BY TUESDAY MORNING. OVERNIGHT MONDAY INTO TUESDAY,
LIGHT TO MODERATE SNOW WILL DEVELOP OVER PARTS OF THE
NORTHEAST/NORTHERN MID-ATLANTIC. ALONG THE RAIN/SNOW LINE, LIGHT
RAIN/FREEZING RAIN AREAS WILL DEVELOP OVER PARTS OF THE
MID-ATLANTIC/CENTRAL APPALACHIANS THROUGH EARLY TUESDAY MORNING
INTO TUESDAY EVENING.
MOREOVER, LIGHT RAIN WILL DEVELOP FROM THE SOUTHERN PLAINS TO THE
OHIO VALLEY ON MONDAY. THE RAIN WILL CONTINUE OVER PARTS OF THE
MIDDLE MISSISSIPPI AND OHIO VALLEYS THROUGH WEDNESDAY. IN
ADDITION, RETURN FLOW OFF THE GULF OF MEXICO WILL STREAM MOISTURE
OVER THE SOUTHERN PLAINS, PRODUCING SHOWERS AND THUNDERSTORMS
OVERNIGHT MONDAY THROUGH TUESDAY. OVERNIGHT TUESDAY, THE SHOWERS
AND THUNDERSTORMS WILL MOVE INTO PARTS OF THE LOWER MISSISSIPPI
VALLEY AND CONTINUE THROUGH WEDNESDAY EVENING.
FURTHERMORE, LOW PRESSURE WILL DEVELOP ALONG THE SOUTHEAST COAST
AND SLOWLY MOVE NORTHEASTWARD OUT OVER THE WESTERN ATLANTIC. THE
LOW WILL PULL MOISTURE OFF THE ATLANTIC AND STREAM THE MOISTURE
NORTHWARD OVER THE SOUTHERN MID-ATLANTIC, PRODUCING LIGHT RAIN
OVER THE AREA THROUGH TUESDAY NIGHT.
MEANWHILE, ON MONDAY INTO TUESDAY, A FRONT OVER THE EASTERN
PACIFIC WILL MOVE ONSHORE OVER THE WEST COAST AND CONTINUE TO MOVE
INTO THE GREAT BASIN/SOUTHERN CALIFORNIA BY TUESDAY AND INTO THE
SOUTHERN HIGH PLAINS BY WEDNESDAY AFTERNOON. THE SYSTEM WILL BRING
MOISTURE ONSHORE, PRODUCING LIGHT RAIN OVER THE PACIFIC NORTHWEST
AND MODERATE TO HEAVY RAIN OVER NORTHERN CALIFORNIA. AS THE FRONT
PASSES, RAIN WILL TURN OVER TO SNOW OVER PARTS OF THE HIGHER
ELEVATIONS OF THE NORTHWEST AND NORTHERN/CENTRAL CALIFORNIA AND
LIGHT TO MODERATE SNOW OVER THE SIERRA NEVADA MOUNTAINS MONDAY
NIGHT INTO TUESDAY. THE SYSTEM WILL CREATE LOWER-ELEVATION RAIN
AND HIGHER-ELEVATION SNOW OVER PARTS OF THE NORTHERN INTERMOUNTAIN
REGION AND THE GREAT BASIN TUESDAY EVENING INTO WEDNESDAY. LIGHT
SNOW WILL MOVE INTO PARTS OF THE CENTRAL/SOUTHERN ROCKIES BY
WEDNESDAY AFTERNOON.
MOREOVER, ANOTHER BOUNDARY OVER THE EASTERN PACIFIC WILL APPROACH
THE NORTHWEST COAST ON WEDNESDAY. MOISTURE ASSOCIATED WITH THE
STORM WILL PRODUCE LIGHT RAIN AND HIGHER-ELEVATION SNOW OVER PARTS
OF THE PACIFIC NORTHWEST.
ZIEGENFELDER
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