608
FXUS01 KWBC 300806
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
300 AM EST TUE DEC 30 2025
VALID 12Z TUE DEC 30 2025 - 12Z THU JAN 01 2026
...HEAVY LAKE-EFFECT SNOW EXPECTED TO LINGER ACROSS THE GREAT
LAKES AS A BIG CYCLONE PIVOTS AWAY INTO EASTERN CANADA...
...ARCTIC AIR WILL DOMINATE THE EASTERN TWO-THIRDS OF THE COUNTRY
INCLUDING FLORIDA FOLLOWED BY A QUICK WARM-UP ACROSS THE NORTHERN
AND CENTRAL PLAINS AMID A MILD AND TRANQUIL INTERMOUNTAIN WEST...
...RAIN ASSOCIATED WITH A ANOMALOUS LOW PRESSURE SYSTEM FROM THE
TROPICAL LATITUDES IS FORECAST TO BRING THE THREAT OF FLASH
FLOODING FOR SOUTHERN CALIFORNIA ON NEW YEAR'S EVE INTO NEW YEAR'S
DAY...
WITH THE GRADUAL DEPARTURE OF AN INTENSE CYCLONE THAT HAS RECENTLY
IMPACTED PORTIONS OF THE UPPER MIDWEST AND GREAT LAKES WITH
BLIZZARD CONDITIONS, MUCH OF THE U.S. MAINLAND WILL ENTER A PERIOD
OF RELATIVE TRANQUIL WEATHER. NEVERTHELESS, THE SURGE OF ARCTIC
AIR BEHIND THE INTENSE CYCLONE WILL INVADE MUCH OF THE EASTERN
TWO-THIRDS OF THE COUNTRY. IN THE PROCESS, THE LAKE-EFFECT "SNOW
MACHINE" WILL REMAIN ACTIVE DOWNWIND FROM THE GREAT LAKES, AND
WILL BE REINFORCED WITH THE ARRIVAL OF AN ALBERTA CLIPPER LATER
TODAY. THE HIGHEST SNOWFALL TOTALS ARE FORECAST TO BE DOWNWIND OF
LAKES ERIE AND ONTARIO WHERE AN ADDITIONAL 1-2 FEET WITH LOCALLY
3+ FEET POSSIBLE WITHIN THE HEAVIEST SNOW BANDS THROUGH THE NEXT
COUPLE OF DAYS. ADJACENT AREAS ACROSS THE UPPER MIDWEST TO THE
FAR NORTHERN PLAINS AS WELL AS INTERIOR NEW ENGLAND CAN ALSO
EXPECT SNOW SHOWERS FROM THE CLIPPER, ALTHOUGH WINTER WEATHER
IMPACTS APPEAR TO BE MINOR. MEANWHILE, BLUSTERY WINDS TODAY WILL
ADD TO THE ARCTIC CHILL ACROSS THE ENTIRE EASTERN U.S., WITH LOW
TEMPERATURES REACHING THE FREEZING MARK AS FAR SOUTH AS THE
FLORIDA PANHANDLE EARLY THIS MORNING, PROMPTING THE ISSUANCE OF
FREEZE WARNINGS, WATCHES, AND COLD WEATHER ADVISORIES ACROSS THE
REGION. BY WEDNESDAY MORNING, FREEZING TEMPERATURES ARE FORECAST
TO REACH EVEN FARTHER SOUTH INTO THE SUBURBS OF TAMPA, FLORIDA
BEFORE A GRADUAL MODERATING TREND SETS IN ACROSS THE EASTERN U.S.
MEANWHILE, SNOW SHOWERS COULD BE AS FAR SOUTH AS THE PANHANDLES OF
MARYLAND AND WEST VIRGINIA THIS MORNING AS GENERAL LIGHT SNOW
EXITS MAINE.
TRANQUIL WEATHER AND MILDER THAN NORMAL TEMPERATURES WILL PREVAIL
ACROSS MUCH OF THE INTERMOUNTAIN WEST UNDER THE INFLUENCE OF A
STABLE HIGH PRESSURE RIDGE AT ALL LEVELS OF THE ATMOSPHERE. THE
MILDER THAN NORMAL TEMPERATURES WILL QUICKLY SPILL INTO THE
NORTHERN AND CENTRAL PLAINS TODAY BEHIND A WARM FRONT WITH THE
AFOREMENTIONED ALBERTA CLIPPER APPROACHING THE U.S.-CANADIAN
BORDER. BY WEDNESDAY, THE MILD AIR WILL BE SHOVED FARTHER SOUTH
INTO THE CENTRAL PLAINS AS A REINFORCING SHOT OF ARCTIC AIR
REACHES INTO THE UPPER MIDWEST AND THE GREAT LAKES BEHIND THE
CLIPPER. A SWATH OF LIGHT SNOW IS FORECAST TO SPREAD INTO THE
OHIO VALLEY ON NEW YEAR'S EVE, REACHING INTO THE WESTERN SLOPES OF
THE CENTRAL APPALACHIANS AT THE DAWN OF THE NEW YEAR!
MEANWHILE, RAIN AHEAD OF A LOW PRESSURE SYSTEM THAT HAS DEVELOPED
IN THE UNUSUALLY SOUTHERN LATITUDES OF THE EASTERN PACIFIC IS
LURKING JUST OFF BAJA CALIFORNIA IN NORTHWESTERN MEXICO. THIS
SYSTEM IS FORECAST TO HEAD NORTH AND EDGE TOWARD CALIFORNIA
THROUGH THE NEXT COUPLE OF DAYS. THE RAIN IS FORECAST TO REACH
SOUTHERN CALIFORNIA ON NEW YEAR'S EVE AND CONTINUE TO SPREAD NORTH
THROUGH MUCH OF CALIFORNIA, THE DESERT SOUTHWEST, REACHING INTO
GREAT BASIN AND THE FOUR CORNERS FROM NEW YEAR'S EVE TO NEW YEAR'S
DAY. IT APPEARS THAT HEAVY RAIN COULD BEGIN IMPACTING COASTAL
SOUTHERN CALIFORNIA INCLUDING LOS ANGELES EARLY ON NEW YEAR'S DAY
ALONG WITH A LOOMING THREAT OF FLASH FLOODING AS THE TRIPLE-POINT
FRONTAL SYSTEM APPROACHES.
KONG
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