596
FXUS65 KGGW 092231
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
331 PM MST FRI JAN 9 2026
KEY MESSAGES
- A WARM FRONT ON SATURDAY WILL BRING SNOW SHOWERS TO FAR EASTERN
MONTANA, FOLLOWED BY SEVERAL DAYS OF ABOVE NORMAL TEMPERATURES.
- WINDY FROM A CHINOOK AT TIMES THROUGH THE WEEK, PARTICULARLY
MONDAY IN THE LITTLE ROCKIES.
DISCUSSION
WEATHER PATTERN OVERVIEW:
WITH A WARM FRONTAL PASSAGE ON SATURDAY, MOISTURE AHEAD OF THE
BOUNDARY WILL SET UP THE OPPORTUNITY FOR SNOW ACCUMULATIONS UP TO
ONE INCH NEAR THE NORTH DAKOTA BORDER LATE TONIGHT INTO SATURDAY
MORNING. MORE HIGH RESOLUTION AND ENSEMBLE GUIDANCE HAS COME TO A
CONSENSUS FOR A HALF INCH TO AN INCH FOR WIBAUX COUNTY AND THE
BIG SHEEPS.
BEHIND THE WARM FRONT, AN UPPER LEVEL RIDGE WILL BUILD INTO EARLY
NEXT WEEK, BRINGING MUCH WARMER THAN NORMAL TEMPERATURES, DRY AND
BREEZY CONDITIONS. A STRONGER CHINOOK WIND MOVES IN MONDAY,
ESPECIALLY FOR THE LITTLE ROCKIES WHERE SOME ENSEMBLE MEMBERS
SHOW POTENTIAL FOR WIND GUSTS TO 60 MPH. THERE IS POTENTIAL FOR
NIGHTTIME FOG WITH INVERSIONS AND SNOW MELT ACROSS THE HI-LINE.
FORECAST CONFIDENCE & DEVIATIONS:
BLENDED IN A FEW HIGHER RESOLUTION MODELS AND NBM 90TH PERCENTILE TO
INCREASE BOTH SNOWFALL CHANCES AND WINDS THROUGH SATURDAY.
THERE IS HIGH CONFIDENCE FOR TEMPERATURES AND GENERALLY DRY
WEATHER THROUGH THE END OF THE WORK WEEK, WITH LOW CONFIDENCE ON
LOCATIONS WITH FOG BEGINNING TOMORROW NIGHT.
-JEZ
AVIATION
UPDATED: 2200Z
FLIGHT CONDITION: MAINLY VFR
DISCUSSION: THERE IS MODERATE (40-60%) CONFIDENCE FOR A LIGHT
DUSTING OF ACCUMULATION FROM SNOW SHOWERS AT KSDY AND KGDV LATE
TONIGHT INTO SATURDAY MORNING. OTHERWISE, WINDS WILL GENERALLY BE
LIGHT WITH ONLY A SLIGHT (20%) CHANCE OF MVFR TO IFR CONDITIONS
AT THE TAF SITES WITH THE SNOW SHOWERS.
LLWS: AREAS OF SPEED SHEAR WITH LOW LEVEL INVERSION, PRIMARILY
AROUND KGGW BETWEEN 10-18Z.
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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