820
FXUS01 KWBC 301845
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
145 PM EST TUE DEC 30 2025
VALID 00Z WED DEC 31 2025 - 00Z FRI JAN 02 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 GREAT
PLAINS...
...RAIN ASSOCIATED WITH AN 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 THIS
EVENING. 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 OVER 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 WILL ADD TO
THE ARCTIC CHILL ACROSS THE ENTIRE EASTERN U.S., WITH LOW
TEMPERATURES REACHING THE FREEZING MARK AS FAR SOUTH AS CENTRAL
FLORIDA EARLY WEDNESDAY MORNING, PROMPTING THE CONTINUATION OF
FREEZE WARNINGS AND COLD WEATHER ADVISORIES ACROSS THE REGION. A
MODERATING TREND ENSUES ON THURSDAY.
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 THIS EVENING 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 OVER
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.
KEBEDE/KONG
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page