539
FXUS65 KGGW 081837
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
1237 PM MDT TUE SEP 8 2026
KEY MESSAGES
- SHOWERS AND THUNDERSTORMS WILL MOVE THROUGH NE MONTANA THIS
AFTERNOON AND EVENING, MAINLY ACROSS THE NORTHERN ZONES.
- WEST WINDS WILL GRADUALLY DIMINISH TONIGHT.
- A WARMING TREND IS EXPECTED THROUGH THURSDAY, THEN COOLER WITH
THE CHANCE OF SHOWERS THROUGH THE WEEKEND. A FIRE WEATHER WATCH
IS IN EFFECT FROM NOON TILL 8 PM THURSDAY.
DISCUSSION
AN UPPER LEVEL DISTURBANCE MOVING EAST ACROSS EASTERN MONTANA
TODAY WILL HELP BRING SHOWERS AND THUNDERSTORMS EAST ACROSS THE
NORTHERN ZONES THROUGH THIS EVENING. AMOUNTS THIS EVENING COULD
BE A QUARTER OF AN INCH IN THE NORTHEAST ZONES.
WINDS WILL DIMINISH TONIGHT AS SKIES CLEAR AND THE ATMOSPHERE
DECOUPLES. THEN A WARM FRONT MOVES EAST THROUGH WEDNESDAY WITH
SOME CLOUDS ASSOCIATED WITH IT. HIGH TEMPERATURES WILL BE ABOUT 5
TO 10 DEGREES WARMER THAN TODAY'S.
A WARMER DAY IS EXPECTED THURSDAY AS A COLD FRONT APPROACHES THE
AREA FROM THE NORTHWEST. SUNSHINE AND PREFRONTAL COMPRESSIONAL
WARMING SHOULD ALLOW FOR TEMPERATURES TO REACH THE 80S MOST
PLACES. WITH INCREASING WEST WINDS, MINIMUM HUMIDITY IN THE TEENS
AND LITTLE RAINFALL IN THE SOUTHEAST ZONES RECENTLY (TENTH OF AN
INCH OR LESS), A FIRE WEATHER WATCH HAS BEEN ISSUED FOR THURSDAY
FROM NOON TILL 8 PM.
THE COLD FRONT THEN DROPS SOUTHEAST ACROSS THE AREA THURSDAY NIGHT
BRINGING THE CHANCE OF SHOWERS BY FRIDAY AND TEMPERATURES ABOUT 15
TO 20 DEGREES COOLER THAN THURSDAY.
THE COOLER/WETTER CONDITIONS LINGER THROUGH THE WEEKEND AS AN
UPPER TROUGH SETTLES IN THEN AN UPPER LOW DRIFTS EAST FROM THE
PACIFIC NW.
FORECAST CONFIDENCE & DEVIATIONS:
POPS THROUGH THIS EVENING WERE TWEAKED FROM THE NBM TO MATCH
BETTER WITH NEIGHBORING OFFICES. TEMPS THURSDAY WERE TWEAKED
CLOSER TO NBM90 GIVEN THE FULL SUN AND PREFRONTAL COMPRESSIONAL
WARMING. ALL OTHER ELEMENTS CLOSELY FOLLOWED THE NBM. TFJ
AVIATION
LAST UPDATED: 1835Z
FLIGHT CAT RANGE: MVFR CEILINGS AT KGGW AND KOLF THIS EVENING.
VFR CEILINGS AT KSDY AND KGDV.
DISCUSSION: LOW CLOUDS WILL LINGER AT KGGW AND KOLF INTO THIS
EVENING AS RAIN SHOWERS MOVE IN. CONDITIONS IMPROVE LATER TONIGHT
AS THE CONDITIONS DRY. VFR CLOUDS WILL MOVE EAST THROUGH THE AREA
WEDNESDAY.
WEST WINDS WILL DIMINISH TO 10 TO 15 KNOTS TONIGHT. TFJ
GGW WATCHES/WARNINGS/ADVISORIES
LAKE WIND ADVISORY UNTIL MIDNIGHT MDT TONIGHT FOR CENTRAL AND
SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY-GARFIELD-MCCONE-
PETROLEUM.
FIRE WEATHER WATCH FROM THURSDAY AFTERNOON THROUGH THURSDAY
EVENING FOR DAWSON/MCCONE/PRAIRIE/RICHLAND/WIBAUX COUNTIES.
WEATHER.GOV/GLASGOW
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