933
FXUS01 KWBC 070745
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
244 AM EST TUE JAN 07 2025
VALID 12Z TUE JAN 07 2025 - 12Z THU JAN 09 2025
...MODERATE TO HEAVY LAKE-EFFECT SNOW DOWNWIND FROM THE GREAT
LAKES ON TUESDAY AND WEDNESDAY...
...A DEVELOPING WINTER STORM WILL PRODUCE SNOW AND RAIN/FREEZING
RAIN, ICING, OVER PARTS OF TEXAS ON WEDNESDAY...
...LIGHT SNOW OVER PARTS OF THE GREAT BASIN, SOUTHWEST, AND
CENTRAL/SOUTHERN ROCKIES ON TUESDAY AND OVER THE NORTHERN
ROCKIES/NORTHERN HIGH PLAINS ON WEDNESDAY...
...THERE IS A CRITICAL RISK OF FIRE WEATHER OVER PARTS OF SOUTHERN
CALIFORNIA ON TUESDAY...
COLD HIGH PRESSURE OVER THE NORTHERN HIGH PLAINS WILL MOVE
SOUTHEASTWARD TO THE OHIO VALLEY BY THURSDAY. THE COLD AIR AND
UPPER-LEVEL ENERGY WILL AID IN PRODUCING MODERATE TO HEAVY
LAKE-EFFECT SNOW DOWNWIND FROM THE GREAT LAKES THROUGH THURSDAY.
IN ADDITION, MODERATE TO HEAVY UPSLOPE SNOW WILL DEVELOP OVER
PARTS OF NORTHERN NEW ENGLAND, AND LIGHT TO MODERATE UPSLOPE SNOW
OVER THE CENTRAL APPALACHIANS WILL DEVELOP THROUGH THURSDAY.
MEANWHILE, STRONG HIGH PRESSURE WILL DEVELOP OVER PARTS OF THE
GREAT BASIN ON TUESDAY, SETTING UP SANTA ANA WINDS OVER SOUTHERN
CALIFORNIA. THEREFORE, THE SPC HAS ISSUED A CRITICAL RISK OF FIRE
WEATHER OVER PARTS OF SOUTHERN CALIFORNIA. WINDS OF 20 TO 25 MPH
WITH STRONGER WIND IN THE TERRAIN, LOW RELATIVE HUMIDITY, AND DRY
FUELS HAVE CONTRIBUTED TO THE DANGEROUS CONDITIONS.
MOREOVER, ON TUESDAY, UPPER-LEVEL ENERGY OVER SOUTHERN CALIFORNIA
WILL MOVE SOUTHWARD TO NORTHWESTERN MEXICO, CREATING A DEEP UPPER
LOW OVER THE REGION BY WEDNESDAY. THE ENERGY WILL BEGIN TO MOVE
EASTWARD OVER NORTHERN MEXICO BY THURSDAY. BY TUESDAY MORNING,
LIGHT TO MODERATE SNOW WILL DEVELOP OVER PARTS OF THE GREAT BASIN
AND THE NORTHERN/CENTRAL ROCKIES. LIGHT TO MODERATE SNOW WILL
DEVELOP OVER PARTS OF THE SOUTHERN ROCKIES BY TUESDAY EVENING.
THE SYSTEM WILL PRODUCE LIGHT SNOW OVER WEST TEXAS ON WEDNESDAY
BEFORE A MORE SIGNIFICANT STORM ON THURSDAY. MANY AREAS FROM
NORTHERN TEXAS, INCLUDING THE DALLAS-FORT WORTH METROPLEX, WILL
HAVE AT LEAST SOME CHANCE (>30%) OF WINTRY WEATHER. WITH COLD AIR
ALREADY IN PLACE, A WINTRY MIX OF SNOW, SLEET, AND FREEZING RAIN
IS FORECAST FOR THE SOUTHERN PLAINS, WHICH MAY CAUSE HAZARDOUS
DRIVING CONDITIONS, STARTING LATE WEDNESDAY NIGHT AND CONTINUING
INTO THURSDAY MORNING.
FURTHER, ADDITIONAL UPPER-LEVEL ENERGY WILL MOVE OVER THE PACIFIC
NORTHWEST WEDNESDAY MORNING AND REACH THE CENTRAL ROCKIES BY
THURSDAY, AIDING IN THE DEVELOPMENT OF A NEW FRONT FROM THE
NORTHERN/CENTRAL PLAINS INTO THE CENTRAL ROCKIES. 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.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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