471
FXUS65 KGGW 132140
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
240 PM MST TUE JAN 13 2026
DISCUSSION
KEY MESSAGES:
1) A COLD FRONT MOVING IN TODAY WILL BRING TEMPS BELOW FREEZING
TONIGHT FOR MOST LOCATIONS TONIGHT.
2) ABOVE NORMAL TEMPERATURES ARE EXPECTED TO PERSIST UNTIL A
COLD FRONT ARRIVES LATE WEDNESDAY NIGHT.
3) GUSTY NORTHWEST WINDS ARE EXPECTED THURSDAY.
4) TEMPS LOOK TO HOLD NEAR NORMAL THROUGH THE WEEKEND.
WEATHER PATTERN OVERVIEW:
A WEAK COLD FRONT WILL BE MOVING SOUTH THROUGH THE CWA LATE TODAY.
LITTLE SENSIBLE WEATHER WILL BE NOTICED WITH IT EXCEPT FOR MAYBE A
WIND SHIFT. TEMPS TONIGHT ARE EXPECTED TO DROP BELOW FREEZING,
EXCEPT SW PHILLIPS AND PETRO COUNTY/ZONES SHOULD STAY ABOVE
FREEZING TONIGHT.
AN UPPER RIDGE TO OUR WEST WILL MUSCLE IN ANOTHER SURGE OF WARM
AIR LATER WEDNESDAY BEFORE A COLD FRONT DROPS SOUTH LATE WEDNESDAY
NIGHT. INVERSIONS WILL KEEP THE NORTHERN VALLEY LOCATIONS FROM
RISING ABOVE THE 30S, BUT THE SOUTHERN LOCATIONS SHOULD RISE INTO
THE 40S, 50S AND POSSIBLY THE LOW 60S (PETROLEUM COUNTY).
THE COOLING TREND CONTINUES INTO FRIDAY WITH HIGHS FRIDAY NEAR 20
NORTHEAST TO NEAR 40 SOUTHWEST. A SLIGHT UPTICK IN TEMPERATURES
CAN BE EXPECTED OVER THE WEEKEND WITH NEARLY STEADY TEMPS INTO
EARLY NEXT WEEK. DRY CONDITIONS ARE EXPECTED.
FORECAST CONFIDENCE & DEVIATIONS:
USED NBM FOR MOST FORECAST ELEMENTS EXCEPT:
- BUMPED POPS UP SLIGHTLY FOR TONIGHT, THAT GIVES SOME MAINLY SNOW
CHANCES IN THE NORTHEAST.
- BLENDED WITH NBM90 FOR WINDS THURSDAY, FROM 12Z TO 06Z FRIDAY.
TFJ
AVIATION
LAST UPDATED: 2140Z
FLIGHT CAT RANGE: VFR
DISCUSSION: MID TO HIGH LEVEL CLOUDS WILL CONTINUE TO STREAM ACROSS
AREA TERMINALS THROUGH TONIGHT. HOWEVER, LOWER CLOUDS FROM NORTH
DAKOTA WILL MOVE WEST INTO FAR EASTERN MONTANA LATE TONIGHT THAT
COULD BRING SOME SNOWFLAKES. ACCUMULATION IS NOT EXPECTED. MVFR
CEILINGS CAN BE EXPECTED AT KSDY AFTER 04Z THIS EVENING.
WIND: NW WINDS WILL DIMINISH LESS THAN 10 KNOTS THIS EVENING. THEN
INCREASE SLIGHTLY FROM THE W OR SW WEDNESDAY (BUT REMAINING 10 KTS
OR LESS). TFJ
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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