812
FXUS01 KWBC 011845
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
145 PM EST WED JAN 01 2025
VALID 00Z THU JAN 02 2025 - 00Z SAT JAN 04 2025
...COASTAL STORM BRINGS RAIN AND SNOW SHOWERS TO NEW ENGLAND
THROUGH NEW YEAR'S DAY...
...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....
...COVERAGE OF FRIGID WINTER TEMPERATURES BEGINS TO EXPAND FROM
THE NORTHERN PLAINS INTO THE MIDWEST...
A COASTAL STORM OFF OF NEW ENGLAND WILL CONTINUE TO BRING SOME
LIGHT TO MODERATE RAIN SHOWERS TO THE COAST AND ACCUMULATING
SNOWFALL TO HIGHER ELEVATIONS OF THE INTERIOR THROUGH THE
REMAINDER OF NEW YEAR'S DAY. WINTER WEATHER-RELATED ADVISORIES AND
WARNINGS ARE IN PLACE AS SNOWFALL TOTALS OF 5-10 INCHES ARE
EXPECTED, WITH LOCALLY HIGHER AMOUNTS OVER A FOOT POSSIBLE. VERY
BLUSTERY WINDS WILL ALSO CONTINUE ACROSS MUCH OF THE NORTHEAST AS
A WHOLE, AND MAY LEAD TO SOME BLOWING SNOW WHERE SNOWFALL IS
OCCURRING. A FAVORABLE PATTERN FOR HEAVY LAKE-EFFECT SNOW WILL
ALSO REMAIN IN PLACE IN THE GREAT LAKES OVER THE NEXT FEW DAYS,
PARTICULARLY DOWNWIND OF LAKES ERIE AND ONTARIO. STORM TOTAL
SNOWFALL OF 2-4 FEET WILL BE POSSIBLE FOR AREAS THAT SEE THE MOST
PERSISTENT LAKE-EFFECT BANDS. SOME MORE MODERATE ACCUMULATIONS
WILL ALSO BE POSSIBLE IN MICHIGAN DOWNWIND OF LAKES SUPERIOR AND
MICHIGAN. A QUICK MOVING SYSTEM WILL LEAD TO SOME LIGHT WINTRY
PRECIPITATION FOR PORTIONS OF THE MIDWEST THURSDAY BEFORE BRINGING
SOME MORE SIGNIFICANT ACCUMULATING SNOWFALL TO THE CENTRAL
APPALACHIANS FRIDAY AS WELL.
MODERATE TO HEAVY COASTAL RAINFALL, AN INTERIOR WINTRY MIX, AND
HIGHER ELEVATION SNOW WILL CONTINUE ACROSS PORTIONS OF THE PACIFIC
NORTHWEST/NORTHERN CALIFORNIA AND THE NORTHERN GREAT BASIN/ROCKIES
THROUGH THIS EVENING AS A PACIFIC SYSTEM PASSES THROUGH THE
REGION. AN ACCOMPANYING UPPER-LEVEL SHORTWAVE WILL ALSO DROP
SOUTHEASTWARD THROUGH THE CENTRAL ROCKIES BRINGING ADDITIONAL SNOW
CHANCES THROUGH THE DAY THURSDAY. HEAVY ACCUMULATIONS OF AROUND
8-14 INCHES, LOCALLY HIGHER, WILL BE POSSIBLE FOR MANY OF THE
AREAL MOUNTAIN RANGES. RAINFALL ON THE COAST WILL BE LOCALLY HEAVY
AS WELL, WITH THE POTENTIAL FOR SOME ISOLATED FLOODING FOR
FAVORABLE UPSLOPE AREAS ALONG THE COASTAL RANGES OF SOUTHWESTERN
OREGON AND NORTHERN CALIFORNIA. PRECIPITATION WILL TAPER OFF
THROUGH THE EVENING AND INTO THE MORNING THURSDAY FROM WEST TO
EAST AS THE SYSTEM/UPPER-WAVE PASS THROUGH BEFORE ANOTHER SYSTEM
APPROACHES THE PACIFIC NORTHWEST INTO THURSDAY NIGHT. ADDITIONAL
LOCALLY HEAVY RAINFALL AND THE POTENTIAL FOR ISOLATED FLOODING
WILL REMAIN POSSIBLE FOR SOUTHERN OREGON/NORTHERN CALIFORNIA
THROUGH FRIDAY. A RENEWED ROUND OF SNOW WILL ALSO COME TO THE
HIGHER MOUNTAIN ELEVATIONS, PARTICULARLY IN THE NORTHERN CASCADES.
FRIGID WINTER TEMPERATURES WILL INCREASINGLY BECOME A BIGGER STORY
HEADING INTO JANUARY AS A STAGNANT PATTERN FEATURING A STRONG
UPPER-LEVEL LOW OVER SOUTHEASTERN CANADA/THE NORTHEASTERN U.S.
SETTLES IN. THESE VERY COLD, BELOW AVERAGE FOR JANUARY
TEMPERATURES HAVE ALREADY COME TO THE NORTHERN PLAINS, WHERE HIGHS
IN THE SINGLE DIGITS AND TEENS WILL BE COMMON AND WIND CHILLS WILL
BE BELOW ZERO. HIGHS ONLY IN THE TEENS AND 20S EXPAND INTO THE
MIDWEST BY FRIDAY. ELSEWHERE, TEMPERATURES WILL BE AROUND OR A BIT
BELOW AVERAGE ALONG THE EAST COAST, WITH MAINLY 30S AND 40S IN THE
NORTHEAST, 40S AND 50S IN THE CAROLINAS, 50S IN THE SOUTHEAST, AND
60S INTO FLORIDA. MUCH OF THE WESTERN AND SOUTH-CENTRAL U.S. WILL
SEE MUCH MORE MILD, ABOVE AVERAGE TEMPERATURES TO END THE WEEK,
WITH HIGHS IN THE 40S AND 50S IN THE PACIFIC NORTHWEST AND
INTERIOR WEST; THE 50S AND 60S IN THE SOUTHERN PLAINS AND ROCKIES
AS WELL AS CALIFORNIA; AND THE 60S AND 70S IN THE SOUTHWEST.
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