869
FXUS01 KWBC 080851
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
349 AM EST WED JAN 08 2025
VALID 12Z WED JAN 08 2025 - 12Z FRI JAN 10 2025
...MODERATE TO HEAVY LAKE-EFFECT SNOW DOWNWIND FROM THE GREAT
LAKES ON WEDNESDAY...
...A DEVELOPING WINTER STORM WILL PRODUCE SNOW AND RAIN/FREEZING
RAIN, ICING, OVER PARTS OF THE SOUTHERN PLAINS AND LOWER
MISSISSIPPI VALLEY LATE WEDNESDAY NIGHT INTO THURSDAY...
...LIGHT TO MODERATE SNOW OVER PARTS OF THE NORTHERN
ROCKIES/NORTHERN PLAINS AND SOUTHERN ROCKIES/SOUTHERN HIGH PLAINS
ON WEDNESDAY: LIGHT SNOW OVER PARTS OF THE UPPER MIDWEST ON
THURSDAY...
...THERE IS AN EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS
OF THE SOUTHERN CALIFORNIA COAST...
COLD HIGH PRESSURE EXTENDING FROM THE CENTRAL PLAINS TO WESTERN
ONTARIO, CANADA, MOVES TO THE MID-ATLANTIC BY FRIDAY. THE COLD AIR
AND UPPER-LEVEL ENERGY WILL AID IN PRODUCING MODERATE TO HEAVY
LAKE-EFFECT SNOW DOWNWIND FROM THE GREAT LAKES ON WEDNESDAY AND
WILL BEGIN TO TAPER OFF ON THURSDAY. IN ADDITION, MODERATE TO
HEAVY UPSLOPE SNOW WILL DEVELOP OVER PARTS OF THE NORTHEAST, AND
LIGHT TO MODERATE UPSLOPE SNOW OVER THE CENTRAL APPALACHIANS WILL
DEVELOP ON WEDNESDAY.
MEANWHILE, STRONG HIGH PRESSURE OVER PARTS OF THE GREAT BASIN AND
LOW PRESSURE DROPPING INTO THE GULF OF CALIFORNIA WILL CONTINUE TO
SUPPORT SANTA ANA WINDS AND A DANGEROUS FIRE WEATHER EVENT OVER
PORTIONS OF SOUTHERN CALIFORNIA ON WEDNESDAY. THE SPC HAS ISSUED A
EXTREMELY CRITICAL FIRE WEATHER AREA ALONG PORTIONS OF THE
SOUTHERN CALIFORNIA COAST. SUSTAINED WINDS REACHING 30 TO 40 MPH,
WITH STRONGER WINDS IN THE TERRAIN, ALONG WITH LOW RELATIVE
HUMIDITY, AND DRY FUELS WILL CONTRIBUTE TO THE DANGEROUS
CONDITIONS. CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED TO
CONTINUE ON THURSDAY FOR PORTIONS OF SOUTHERN CALIFORNIA.
MOREOVER, ON WEDNESDAY, A DEEP UPPER LOW OVER NORTHWESTERN MEXICO
WILL OPEN AND MOVE TO THE SOUTHERN ROCKIES TO THE SOUTHERN PLAINS
BY FRIDAY. THE SYSTEM WILL CREATE IMPACTFUL WINTER WEATHER ON
THURSDAY FOR PORTIONS OF THE SOUTHERN PLAINS BEFORE INTENSIFYING
AS IT EXPANDS ACROSS THE LOWER MISSISSIPPI VALLEY OVERNIGHT
THURSDAY INTO FRIDAY. SNOWFALL TOTALS WILL BE THE GREATEST, 4 TO 8
INCHES, FROM PORTIONS OF NORTH TEXAS ACROSS ARKANSAS INTO THE
TENNESSEE VALLEY. HAZARDOUS DRIVING CONDITIONS CAN BE EXPECTED
THROUGH THE SWATH OF WINTER WEATHER. ADDITIONALLY, RAIN/FREEZING
RAIN WILL DEVELOP OVER PARTS OF CENTRAL TEXAS INTO SOUTHERN
ARKANSAS AND NORTHERN LOUISIANA. OVER THIS REGION, SCATTERED ICE
AMOUNTS OF 0.10 INCHES WILL FALL ON THURSDAY.
FURTHERMORE, ADDITIONAL UPPER-LEVEL ENERGY WILL MOVE OVER THE
PACIFIC NORTHWEST/NORTHERN INTERMOUNTAIN REGION WEDNESDAY MORNING
AND REACH THE SOUTHERN ROCKIES AND THE UPPER GREAT LAKES BY
FRIDAY. THE ENERGY WILL AID IN THE DEVELOPMENT OF A NEW FRONT OVER
THE NORTHERN/CENTRAL PLAINS INTO THE CENTRAL ROCKIES THAT WILL
MOVE EASTWARD TO THE UPPER GREAT LAKES TO THE SOUTHERN PLAINS BY
FRIDAY.
THE NEW ENERGY WILL CREATE A SHORT-LIVED LIGHT COASTAL RAIN AND
HIGHER-ELEVATION SNOW OVER PARTS OF THE PACIFIC NORTHWEST ON EARLY
WEDNESDAY MORNING. BY WEDNESDAY EVENING, LIGHT SNOW WILL DEVELOP
OVER PARTS OF THE NORTHERN ROCKIES, EXPANDING INTO PARTS OF THE
NORTHERN PLAINS AND CENTRAL ROCKIES BY THURSDAY MORNING. BY
THURSDAY NIGHT, LIGHT SNOW WILL EXTEND FROM THE NORTHERN
PLAINS/UPPER MISSISSIPPI VALLEY TO THE CENTRAL/SOUTHERN ROCKIES
AND CENTRAL/SOUTHERN PLAINS. BY FRIDAY MORNING, THE LIGHT SNOW
WILL MOVE INTO THE UPPER GREAT LAKES AND MIDDLE MISSISSIPPI
VALLEY, WHILE CONTINUING OVER THE SOUTHERN PLAINS.
MOREOVER, BY FRIDAY, A NEW FRONT MOVING ONSHORE OVER THE PACIFIC
NORTHWEST WILL TRIGGER COASTAL RAIN AND HIGHER-ELEVATION SNOW OVER
PARTS OF THE PACIFIC NORTHWEST.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page