107
FXUS01 KWBC 270808
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
300 AM EST SAT DEC 27 2025
VALID 12Z SAT DEC 27 2025 - 12Z MON DEC 29 2025
...ARCTIC AIR WILL DESCEND INTO THE PLAINS BEGINNING SUNDAY
FOLLOWED BY A POTENT WINTER STORM ACROSS THE UPPER MIDWEST TO THE
GREAT LAKES SUNDAY NIGHT TO MONDAY...
...SNOW ENDING ACROSS SOUTHERN NEW ENGLAND AS SNOW MOVES ACROSS
THE INTERMOUNTAIN WEST...
...MORE RECORD WARMTH ACROSS THE SOUTH TO THE TENNESSEE VALLEY
THIS WEEKEND...
MUCH OF CENTRAL AND SOUTHERN NEW ENGLAND WILL WAKE UP WITH 4 TO 8+
INCHES OF SNOW THIS MORNING AS A CLIPPER LOW PRESSURE SYSTEM
CONTINUES TO PRESS EASTWARD AGAINST A CANADIAN HIGH PRESSURE
SYSTEM THAT IS SUPPLYING THE COLD AIR. THE SYSTEM WILL INTENSIFY
RAPIDLY AS IT MOVES SWIFTLY OUT INTO THE ATLANTIC DURING THE DAY
TODAY, ENDING THIS LATEST ROUND OF WINTER STORM FOR THE NORTHEAST
WITH COLDER THAN NORMAL TEMPERATURES THROUGH THE REMAINDER OF THE
WEEKEND.
ACROSS THE WESTERN U.S., THE LAST OF A SERIES OF ENERGETIC LOW
PRESSURE SYSTEMS IS MOVING WELL INLAND AND WILL BRING A ROUND OF
SNOW ACROSS THE INTERMOUNTAIN REGION, WITH RAIN SHOWERS FARTHER
SOUTH ACROSS THE FOUR CORNERS. THIS SYSTEM WILL BEGIN TO INTERACT
WITH AN ARCTIC AIR MASS CURRENTLY SLIDING SOUTHEASTWARD ACROSS
WESTERN CANADA AND BRING A ROUND OF SNOW ACROSS THE NORTHERN AND
CENTRAL ROCKIES AS WELL AS THE NEARBY HIGH PLAINS TODAY INTO
TONIGHT. THE SPEED OF THIS SYSTEM WILL LIMIT THE SNOWFALL
AMOUNTS. BUT AT THE SAME TIME, THE SPEED OF THE COLD AIR
INTRUSION WILL PLUNGE TEMPERATURES TO BELOW ZERO IN MONTANA BY
SUNDAY MORNING WITH WIND CHILLS BELOW -30 DEGREES UNDER BLUSTERY
NORTHERLY WINDS. THE "BLUE NORTHER" WILL CONTINUE TO SURGE
SOUTHWARD THROUGH THE CENTRAL AND SOUTHERN PLAINS ON SUNDAY AS A
LOW PRESSURE SYSTEM RAPIDLY INTENSIFIES ALONG THE ARCTIC FRONT AND
ACCELERATES ACROSS THE MIDWEST, REACHING INTO THE GREAT LAKES
SUNDAY NIGHT. THIS LOW PRESSURE SYSTEM IS POISED TO DEVELOP INTO
A LARGE AND INTENSE CYCLONE WITH BLIZZARD CONDITIONS EXPANDING
ACROSS THE MIDWEST SUNDAY NIGHT. ACROSS THE GREAT LAKES,
WIND-SWEPT RAIN AND EMBEDDED THUNDERSTORMS LATER ON SUNDAY AND
SUNDAY NIGHT ARE FORECAST TO TURN INTO A BLIZZARD BY EARLY ON
MONDAY WITH BLOWING SNOW AND POSSIBLY WHITEOUT CONDITIONS.
SNOWFALL AMOUNTS ARE EXPECTED TO EXCEED A FOOT, PARTICULARLY ALONG
THE SOUTH SHORE OF LAKE SUPERIOR. SEE THE WPC KEY MESSAGE FOR
MORE INFORMATION ON THIS DEVELOPING STORM.
MEANWHILE, ANOMALOUS WARMTH WILL BE THE RULE OVER THE MID-SECTION
OF THE COUNTRY AND ACROSS THE SOUTH. HIGH TEMPERATURES IN THE
MIDDLE 70S TO THE LOW 80S ARE PREDICTED FROM TEXAS TO THE
TENNESSEE VALLEY FOR THE WEEKEND. MANY CITIES COULD BREAK OR NEAR
RECORD WARM HIGH TEMPERATURES EACH DAY, WITH SOME RECORDS DATING
AS FAR BACK AS THE 1880S. LOW TEMPERATURES WILL ALSO BE WARM IN
THE UPPER 50S TO LOW 60S. THIS DECEMBER SOUPY AIRMASS WILL BRING
CHANCES FOR FOG EACH DAY ALONG THE GULF COAST, SOME WHICH MAY BE
LOCALLY DENSE AND BRING LOW VISIBILITY. MEANWHILE, THE ARCTIC
COLD FRONT WILL BRING A DRASTIC END TO THE WARMTH ON SUNDAY IN THE
CENTRAL U.S., WITH A QUICK AROUND OF STRONG THUNDERSTORMS THAT
SIGNALS THE ARRIVAL OF THE "BLUE NORTHER". AREAS FROM THE
ARKLATEX TO THE MIDWEST CAN EXPECT THESE THUNDERSTORMS TO MOVE
THROUGH SUNDAY NIGHT, FOLLOWED BY THE OHIO/TENNESSEE VALLEYS AND
THE DEEP SOUTH INTO MONDAY MORNING.
KONG
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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