809
FXUS01 KWBC 221954
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
254 PM EST WED JAN 22 2025
VALID 00Z THU JAN 23 2025 - 00Z SAT JAN 25 2025
...DANGEROUSLY COLD TEMPERATURES AND WIND CHILL VALUES TO LINGER
FOR MUCH OF THE SOUTH AND EASTERN U.S....
...HIGH WINDS AND SNOW OVER PARTS OF THE MONTANA THROUGH WEDNESDAY
EVENING...
...MODERATE TO HEAVY LAKE-ENHANCED SNOW DOWNWIND FROM THE GREAT
LAKES...
...THERE IS A CRITICAL RISK OF FIRE WEATHER OVER PARTS OF SOUTHERN
CALIFORNIA...
BITTERLY COLD HIGH PRESSURE EXTENDING FROM THE MID-ATLANTIC TO
CENTRAL GULF COAST BRINGS TEMPERATURES 15 TO 25 DEGREES BELOW
AVERAGE FROM PARTS OF THE MID-ATLANTIC TO THE CENTRAL GULF COAST.
ARCTIC AIR WILL PERSIST IN THE SOUTHEAST INTO THURSDAY WITH A SLOW
RETURN TO NORMAL TEMPERATURES EXPECTED BY FRIDAY. MULTIPLE RECORD
LOW TEMPERATURES AND RECORD COLD AFTERNOON HIGHS ARE FORECAST
WEDNESDAY AND THURSDAY. THE ASSOCIATED WIND CHILLS WILL BE ZERO TO
10 DEGREES ABOVE ZERO ACROSS PORTIONS OF THE SOUTHEAST WEDNESDAY
NIGHT AND THURSDAY MORNING. THE COLD TEMPERATURES AND WIND CHILLS
POSE A HEIGHTENED RISK OF HYPOTHERMIA, AS WELL AS FROSTBITE TO
EXPOSED SKIN. PROTECT PETS, LIVESTOCK, AND EXPOSED PLUMBING TO
AVOID OVER-EXPOSURE TO THE COLD. HAVE A COLD WEATHER SURVIVAL KIT
IF TRAVELING, AND FILL UP FUEL TANKS/BATTERIES SO THAT YOU CAN
STAY WARM IF YOU BECOME STRANDED.
MEANWHILE, UPPER-LEVEL ENERGY AND UPSLOPE FLOW WILL PRODUCE LIGHT
SNOW OVER PARTS OF THE NORTHERN ROCKIES FROM WEDNESDAY EVENING
INTO THURSDAY. ADDITIONALLY, HIGH WIND AND SNOW WILL OCCURRED
THROUGH WEDNESDAY EVENING. ON THURSDAY, THE SNOW WILL BECOME LIGHT
TO MODERATE OVER THE REGION AND LIGHT SNOW WILL DEVELOP OVER PARTS
OF THE NORTHERN PLAINS ON FRIDAY.
FURTHERMORE, A CLIPPER SYSTEM OVER THE UPPER GREAT LAKES MOVES
INTO EASTERN CANADA BY THURSDAY WITH THE TRAILING COLD FRONT
MOVING OFF THE NORTHEAST COAST BY FRIDAY EVENING. THE SYSTEM WILL
PRODUCE MODERATE TO HEAVY LAKE-ENHANCED SNOW OVER THE UPPER GREAT
LAKES WEDNESDAY EVENING INTO THURSDAY. LIGHT SNOW WILL ALSO
DEVELOP OVER PARTS OF THE OHIO VALLEY, LIKEWISE, WEDNESDAY EVENING
INTO THURSDAY. THE MODERATE TO HEAVY LAKE-ENHANCED SNOW WILL MOVE
INTO THE LOWER GREAT LAKES THURSDAY EVENING INTO FRIDAY. IN
ADDITION, LIGHT UPSLOPE SNOW WILL DEVELOP OVER PARTS OF THE
CENTRAL APPALACHIANS THURSDAY EVENING INTO FRIDAY.
MOREOVER, STRONG HIGH PRESSURE OVER PARTS OF THE NORTHERN
INTERMOUNTAIN REGION AND GREAT BASIN WILL SET UP SANTA ANA WINDS
OVER SOUTHERN CALIFORNIA. THEREFORE, THE SPC HAS ISSUED A CRITICAL
RISK OF FIRE WEATHER OVER PARTS OF SOUTHERN CALIFORNIA THROUGH
THURSDAY. WINDS OF 20 TO 40 MPH, WITH STRONGER WINDS IN THE
TERRAIN, LOW RELATIVE HUMIDITY, AND DRY FUELS HAVE CONTRIBUTED TO
THE DANGEROUS CONDITIONS.
ZIEGENFELDER
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