932
FXUS01 KWBC 202001
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
300 PM EST MON JAN 20 2025
VALID 00Z TUE JAN 21 2025 - 00Z THU JAN 23 2025
...DANGEROUSLY COLD TEMPERATURES AND WIND CHILL VALUES TO LINGER
FOR MUCH OF THE SOUTH AND EASTERN THIRD OF THE NATION THROUGH
MID-WEEK...
...RARE WINTER STORM TO BRING HEAVY SNOW AS WELL AS AREAS OF SLEET
AND FREEZING RAIN TO THE GULF COAST AND SOUTHEAST WITH WIDESPREAD
IMPACTS...
...EXTREMELY CRITICAL RISK OF FIRE WEATHER FOR SOUTHERN CALIFORNIA
WILL CONTINUE INTO TUESDAY...
A BITTERLY COLD ARCTIC AIRMASS IS CURRENTLY IN PLACE FOR LOCATIONS
EAST OF THE ROCKIES WITH WELL BELOW AVERAGE TEMPERATURES EXTENDING
FROM THE HIGH PLAINS TO THE EAST COAST. WIND CHILL VALUES OF 40 TO
55 DEGREES BELOW ZERO WILL LINGER WITHIN THE CORE OF THE COLDEST
AIR FROM THE NORTHERN PLAINS INTO THE UPPER MISSISSIPPI VALLEY
THROUGH TUESDAY MORNING. WIND CHILL VALUES THAT ARE BELOW ZERO
WILL AFFECT A BROAD PORTION OF THE LOWER 48 EXTENDING FROM THE
SOUTHERN HIGH PLAINS INTO THE OHIO RIVER VALLEY AND NORTHERN
MID-ATLANTIC REGION WITH WIND CHILLS IN THE TEENS AND SINGLE
DIGITS POSSIBLE FOR PORTIONS OF THE GULF COAST. THESE EXTREME COLD
CONDITIONS WILL POSE A RISK OF HYPOTHERMIA TO INDIVIDUALS NOT
DRESSED APPROPRIATELY AS WELL POSE POTENTIAL FOR FROZEN PIPES AND
DAMAGE TO SENSITIVE VEGETATION.
WHILE MUCH WARMER TEMPERATURES ARE FORECAST FOR THE NORTHERN
PLAINS TOMORROW, THE COLD TEMPERATURES WILL CONTINUE FROM THE
MIDWEST TO THE SOUTHERN PLAINS TO THE EAST COAST TOMORROW AND
WEDNESDAY. HIGH TEMPERATURES FOR THESE REGIONS ON TUESDAY ARE
EXPECTED TO BE 20 TO 30 DEGREES BELOW MID-JANUARY AVERAGES AND
LOWS WILL DROP BELOW FREEZING FOR ALL LOCATIONS EAST OF THE
ROCKIES EXCEPT FOR CENTRAL AND SOUTHERN FLORIDA.
WITH THE COLD AIR IN PLACE, WINTRY PRECIPITATION IS EXPECTED TO
OVERSPREAD SOUTH-CENTRAL TEXAS TO THE CENTRAL GULF COAST TONIGHT
AS AN UPPER LEVEL DISTURBANCE PASSES OVER THE SOUTHERN PLAINS.
SNOW OR A SNOW/SLEET MIX IS LIKELY FOR CITIES FROM SAN ANTONIO TO
HOUSTON AND NEW ORLEANS TO ALBANY, GA WHILE FREEZING RAIN FALLS ON
SOUTH TEXAS AND PORTIONS OF SOUTHERN GEORGIA AND NORTHERN FLORIDA
AS THE UNUSUAL WINTER STORM TRACKS EAST ON TUESDAY/TUESDAY NIGHT.
A NARROW STRIPE OF 4 TO 6 INCHES WILL BE POSSIBLE FROM
SOUTHEASTERN TEXAS INTO SOUTHERN LOUISIANA. LIGHT ACCUMULATIONS OF
SNOW ARE EXPECTED FROM THE FLORIDA PANHANDLE TO THE BEACHES OF THE
CAROLINAS. THIS WINTER STORM IS LIKELY TO RESULT IN MAJOR TRAVEL
DISRUPTIONS, INCLUDING SIGNIFICANT TRAFFIC IMPACTS ON AREA
HIGHWAYS, POWER OUTAGES AS WELL AS FLIGHT DELAYS/CANCELLATIONS FOR
THESE AREAS THAT ARE NOT ACCUSTOMED TO IMPACTFUL WINTER WEATHER.
CONDITIONS WILL BEGIN TO WARM FOR THE WESTERN U.S. INTO THE MIDDLE
OF THE WEEK BUT THE CONTINUED DRY CONDITIONS AND DANGEROUS SANTA
ANA WINDS WILL CONTRIBUTE TO EXTREMELY CRITICAL FIRE WEATHER
CONDITIONS FOR SOUTHERN CALIFORNIA THROUGH THE REMAINDER OF TODAY
INTO AT LEAST TUESDAY MORNING. WINDS FOR COASTAL LOCATIONS COULD
GUST INTO THE 50-70 MPH RANGE WHILE WIND GUSTS TO NEAR 100 MPH
WILL BE POSSIBLE IN THE MOUNTAINS AND FOOTHILLS. WHILE SOME
IMPROVEMENT IS POSSIBLE LATER ON TUESDAY, CONDITIONS WILL REMAIN
DANGEROUS WITH ADDITIONAL ROUNDS OF GUSTY OFFSHORE WINDS WHICH
WILL CONTINUE THROUGH WEDNESDAY.
ELSEWHERE, BANDS OF HEAVY LAKE EFFECT SNOW WILL CONTINUE THE NEXT
COUPLE OF DAYS FOR FAVORABLE DOWNWIND LOCATIONS OF THE GREAT LAKES
WITH PERSISTENT NORTHWESTERLY FLOW IN PLACE.
OTTO
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