912
FXUS63 KBIS 260020
AFDBIS
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
620 PM CST TUE NOV 25 2025
KEY MESSAGES
- SNOW WILL GRADUALLY DIMINISH OVER SOUTH CENTRAL NORTH DAKOTA
AND THE JAMES RIVER VALLEY THIS EVENING. GUSTY NORTH-NORTHWEST
WINDS WILL CONTINUE TO CAUSE AREAS OF BLOWING AND DRIFTING
SNOW THROUGH THE EVENING.
- THERE ARE MEDIUM CHANCES FOR LIGHT ACCUMULATING SNOWFALL
FRIDAY AND SATURDAY ACROSS PARTS OF THE NORTHERN PLAINS, WHICH
MAY IMPACT TRAVEL.
- WELL BELOW NORMAL TEMPERATURES ARE FAVORED AFTER THANKSGIVING
AND INTO EARLY NEXT WEEK. WIND CHILL TEMPERATURES AS LOW AS 20
BELOW ZERO WILL BE POSSIBLE SUNDAY NIGHT.
UPDATE
ISSUED AT 619 PM CST TUE NOV 25 2025
THE WINTER WEATHER ADVISORY HAS BEEN CANCELLED. CONDITIONS HAVE
GREATLY IMPROVED OUTSIDE OF THE SOUTHERN JAMES RIVER VALLEY,
WHERE A WINTER STORM WARNING REMAINS IN EFFECT. STILL COULD SEE
PATCHY BLOWING AND DRIFTING SNOW THROUGH THE EVENING, AND ROADS
ARE LIKELY TO REMAIN OR BECOME VERY SLICK.
THE MAIN CONCERN FOR THE SHORT TERM PERIOD IS THE POTENTIAL FOR
FOG DEVELOPMENT LATER TONIGHT. STRATUS IS BEGINNING TO RETREAT
FROM WESTERN NORTH DAKOTA WHERE A SURFACE RIDGE IS FORECAST TO
BUILD IN THROUGH TONIGHT. THIS COULD PROMOTE A FAVORABLE SETUP
FOR FOG FORMATION WITH LIGHT WINDS AND DIFFERENTIAL COOLING
ALONG THE EDGE OF THE STRATUS, AND SURFACE DEWPOINT DEPRESSIONS
ARE ALREADY NEAR ZERO. SOME MODELS MAINTAIN FOG, OR PERHAPS VERY
LOW CLOUDS, THROUGH THE DAY TOMORROW AND THEN SHOW POTENTIAL
FOR A WIDESPREAD DENSE FOG EVENT FROM NORTHWEST TO SOUTH CENTRAL
NORTH DAKOTA WEDNESDAY NIGHT.
UPDATE
ISSUED AT 348 PM CST TUE NOV 25 2025
CANCELED THE WINTER WEATHER ADVISORY FOR THE NORTHERN TIER OF
COUNTIES NOW THAT THE SNOW HAS FULLY LEFT THE AREA. BLOWING SNOW
IS NOT A MAJOR CONCERN WITH HOW WET IT HAS BEEN.
DISCUSSION
ISSUED AT 245 PM CST TUE NOV 25 2025
CURRENTLY THE UPPER LEVEL LOW IS MATURING AND DEEPENING OVER
NORTHEASTERN SOUTH DAKOTA. THERE IS AN OBVIOUS DRY SLOT
WRAPPING IN OVER SOUTHWEST MINNESOTA, WITH A WARM FRONT MOVING
THROUGH SOUTHERN MINNESOTA. THE SURFACE LOW IS ALMOST IN THE
SAME SPOT, SO THE LOW PRESSURE SYSTEM SHOULD BE STACKED AT THIS
POINT AND CONTINUE TO CREATE HIGH SNOWFALL RATES AND AMOUNTS.
HERE IN WESTERN AND CENTRAL NORTH DAKOTA, THE SNOW HAS ENDED
ACROSS THE WEST AND NORTH CENTRAL. FOG HAS NOW FORMED IN THE
WEST AND NORTH AS THE WET SNOW STARTS TO EVAPORATE. IN THE
SOUTH CENTRAL A BAND OF SNOW HAS FORMED IN THE DIFFLUENT FLOW
AS THE LOW PULLS AWAY. IT IS CURRENTLY MOVING EAST THROUGH
BISMARCK/MANDAN. WE HAD TO UPDATE THE NBM FORECAST TO ACCOUNT
FOR THIS SINCE IT HAD NO SNOW THERE ANYMORE. SNOW IS ALSO
STARTING TO LET UP IN THE SOUTHEAST. WE HAVE NOT RECEIVED ANY
RECENT REPORTS, BUT IT LOOKS LIKE THE UPGRADE TO A WARNING HAS
WORKED OUT. OVERALL WINDS UNDERPERFORMED SINCE THE SURFACE LOW
WAS FURTHER SOUTH INTO SOUTH DAKOTA THAN FORECASTED. STILL,
BLOWING SNOW IS POSSIBLE THROUGH THIS EVENING, ESPECIALLY IN THE
SOUTHEAST. HIGH PRESSURE HAS FORMED IN MONTANA UNDER NORTHWEST
FLOW AND WILL PUSH INTO THE STATE OVERNIGHT. WITH THIS,
OVERNIGHT LOWS WILL BE IN THE SINGLE DIGITS TO TEENS.
THE REST OF THIS WEEK WILL BE MUCH COLDER, ABOUT 10 DEGREES
BELOW AVERAGE HIGHS (MID 30S). STRONG NORTHWEST FLOW WILL
DOMINATE. FRIDAY ANOTHER SYSTEM LOOKS TO IMPACT THE NORTHERN
PLAINS. A SHORTWAVE WILL DIG THROUGH MONTANA, PRODUCING A
NORTHERN ROCKIES LOW. CONFIDENCE IS INCREASING IN THIS EVENT AS
IT HAS BEEN IN THE MODELS FOR A FEW DAYS NOW. WITH THIS A FEW
INCHES ARE POSSIBLE BUT IT SHOULD NOT BE AS MUCH AS THE CURRENT
STORM. TIMING AS OF NOW LOOKS LIKE FRIDAY EARLY AFTERNOON
THROUGH SATURDAY EVENING. THIS LOW WILL WRAP EVEN COLDER AIR
DOWN FROM CANADA, COOLING OUR HIGHS DOWN TO THE TEENS. LOW
TEMPERATURES WILL LIKELY BE IN THE NEGATIVES WITH WIND CHILLS
EVEN LOWER. WE WILL CONTINUE TO CLOSELY MONITOR THIS, ESPECIALLY
WITH THE HOLIDAY WEEKEND TRAVEL.
AVIATION /00Z TAFS THROUGH 00Z THURSDAY/
ISSUED AT 619 PM CST TUE NOV 25 2025
MVFR TO IFR CEILINGS ARE FORECAST TO SLOWLY RETREAT EASTWARD
THROUGH THE FORECAST PERIOD. THINK THAT KJMS WILL MAINTAIN AN
MVFR CEILING THROUGH WEDNESDAY AFTERNOON. PARTS OF WESTERN NORTH
DAKOTA COULD SEE FOG AND OR VERY LOW STRATUS DEVELOP ALONG THE
BACK EDGE OF THE RETREAT MVFR/IFR CLOUD DECK LATER TONIGHT INTO
WEDNESDAY MORNING. NORTHWEST WINDS WILL GRADUALLY DIMINISH
THROUGH TONIGHT, BECOMING LIGHT AND VARIABLE ACROSS THE WESTERN
HALF OF THE STATE ON WEDNESDAY.
BIS WATCHES/WARNINGS/ADVISORIES
WINTER STORM WARNING UNTIL MIDNIGHT CST TONIGHT FOR NDZ048-051.
UPDATE...HOLLAN
DISCUSSION...SMITH
AVIATION...HOLLAN
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