254
FXUS01 KWBC 020812
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
311 AM EST THU JAN 02 2025
VALID 12Z THU JAN 02 2025 - 12Z SAT JAN 04 2025
...LONG DURATION LAKE-EFFECT SNOW EVENT CONTINUES DOWNWIND OF THE
GREAT LAKES...
...PERIODS OF LOCALLY HEAVY COASTAL RAINS AND HIGHER ELEVATION
SNOW CONTINUE FOR MUCH OF THE NORTHWESTERN U.S....
...ARCTIC AIR SURGES SOUTH FROM THE NORTHERN PLAINS THROUGH THE
CENTRAL AND EASTERN U.S....
STRONG NORTHWESTERLY WINDS ON THE BACKSIDE OF A DEPARTING LOW
PRESSURE SYSTEM THAT IS MOVING INTO THE CANADIAN MARITIME WILL
GENERATE MODERATE TO HEAVY LAKE ENHANCED SNOW DOWNWIND OF THE
GREAT LAKES OVER THE NEXT FEW DAYS. ANYWHERE BETWEEN 6-12 INCHES
OF SNOW WITH ISOLATED HIGHER AMOUNTS MAY ACCUMULATE DOWNWIND OF
THE LAKES BY SATURDAY MORNING. A LOW PRESSURE SYSTEM TRACKING
ACROSS THE CENTRAL U.S. WILL PRODUCE A LIGHT SWATH OF SNOWFALL
FROM IOWA ACROSS THE OHIO VALLEY TODAY AND INTO THE CENTRAL
APPALACHIANS ON FRIDAY. SNOWFALL ACCUMULATIONS OF 6-12 INCHES ARE
POSSIBLE OVER THE CENTRAL APPALACHIANS.
A SERIES OF LOW PRESSURE SYSTEMS WILL GENERATE RAIN AND HIGH
ELEVATION SNOW ACROSS MUCH OF THE NORTHWEST OVER THE NEXT COUPLE
OF DAYS. THE MOISTURE PLUME ASSOCIATED WITH THE FIRST SYSTEM WILL
BE DIRECTED AT THE NORTHERN CALIFORNIA COAST AND OREGON TODAY,
WHERE AN ISOLATED THREAT OF FLASH FLOODING EXISTS. SNOW SHOWERS
CONTINUE OVER THE NORTHERN/CENTRAL ROCKIES. RAIN AND SNOW SHOWERS
EXPAND IN COVERAGE ACROSS THE NORTHWEST ON FRIDAY. ACCUMULATING
SNOW IS POSSIBLE OVER THE HIGHEST ELEVATIONS OF THE CASCADES,
SIERRA AND NORTHERN ROCKIES. HEAVY RAINFALL EXPANDS INTO THE
UPSLOPE AREAS OF THE SIERRA AS THE COLD FRONT PUSHES THROUGH.
HIGH PRESSURE BUILDS OVER THE GREAT PLAINS, SENDING FRIGID ARCTIC
AIR DOWN THROUGH THE CENTRAL AND EASTERN U.S. THROUGH THE WEEKEND.
MEANWHILE, THE WEST AND SOUTHERN PLAINS WILL EXPERIENCE ABOVE
AVERAGE TEMPERATURES. THERE ALSO CONTINUES TO BE AN ELEVATED FIRE
WEATHER THREAT OVER PARTS OF SOUTHERN CALIFORNIA TODAY.
KEBEDE
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