238
FXUS65 KGGW 080600
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
1200 AM MDT TUE SEP 8 2026
KEY MESSAGES
- STRONG WEST WINDS ARE EXPECTED TODAY. GUSTS UP TO 60 MPH IN THE
LITTLE ROCKIES THIS MORNING AND UP TO 55 MPH ELSEWHERE ARE
POSSIBLE.
- SHOWERS AND THUNDERSTORMS WILL MOVE THROUGH NE MONTANA THIS
AFTERNOON AND EVENING.
- WARM DAY AHEAD A COLD FRONT THURSDAY, THEN COOLER WITH THE
CHANCE OF SHOWERS THROUGH THE WEEKEND.
DISCUSSION
WEATHER PATTERN OVERVIEW:
A STRONG UPPER LOW IS OVER SOUTHERN SASKATCHEWAN EARLY THIS
MORNING. THE LOW WILL MOVE NORTHEAST INTO MANITOBA TODAY.
MEANWHILE, A STRONG SHORTWAVE TROUGH OVER THE PACIFIC NW EARLY
THIS MORNING WILL MOVE EAST ACROSS WESTERN MONTANA THIS MORNING
AND THROUGH EASTERN MONTANA THIS AFTERNOON AND EVENING BRING
SHOWERS AND THUNDERSTORMS WITH IT.
STRONG WEST WINDS ARE EXPECTED TONIGHT AND TUESDAY WITH THE
EXCEPTION OF DECOUPLING AT TIMES TONIGHT ALLOW FOR LIGHTER WINDS
IN SOME AREAS. THE HIGHER ELEVATIONS OF THE LITTLE ROCKIES SHOULD
HAVE THE STRONGEST WINDS TONIGHT WHERE 50 KNOTS 850 MB WINDS COULD
BRING GUSTS TO 60 MPH AT TIMES. ISSUED A HIGH WIND WARNING FOR SW
PHILLIPS COUNTY UNTIL 9 AM. WILL ALSO CONTINUE A LAKE WIND
ADVISORY UNTIL MIDNIGHT TONIGHT.
WINDS WILL DIMINISH TONIGHT AS SURFACE HIGH PRESSURE MOVES INTO
THE AREA.
LOOK FOR SUNSHINE AND WARMER TEMPERATURES ON WEDNESDAY WITH HIGHS
NEAR NORMAL, MID 70S TO NEAR 80 FOR THE CWA.
ON THURSDAY, THE NEXT DISTURBANCE MOVES EAST FROM WESTERN CANADA
WITH A COLD FRONT APPROACHING THE CWA. TEMPS SHOULD REACH NEAR 80
ACROSS THE NORTHERN ZONES AND POSSIBLY NEAR 90 IN THE SOUTHEAST
ZONES. WITH MIN RH IN THE TEENS AND AN INCREASING WEST WIND, FIRE
WEATHER HIGHLIGHTS MAY NEED TO BE CONSIDERED.
ENSEMBLES THEN SHOW A MUCH COOLER PERIOD EXPECTED STARTING FRIDAY
WITH SHOWER CHANCES INCREASING. LOOK FOR HIGH TEMPS TO DROP INTO
THE 60S, POSSIBLY 50S IF STEADIER RAINSHOWERS OCCUR OVER THE
WEEKEND.
FORECAST CONFIDENCE & DEVIATIONS:
FORECAST CONFIDENCE IS HIGH FOR STRONG WINDS TODAY. CONFIDENCE IS
HIGH NORTH AND LOW SOUTH FOR SHOWERS AND THUNDERSTORMS THIS
AFTERNOON AND EVENING. INCREASED WIND SPEEDS EARLY THIS MORNING IN
THE LITTLE ROCKIES. OTHERWISE, NO CHANGES TO NBM.
AVIATION
LAST UPDATED: 0600Z
FLIGHT CAT RANGE: VFR EARLY THEN MVFR AFTER 12Z AT KGGW & KOLF AND
AFTER 17Z AT KSDY. VFR TONIGHT.
DISCUSSION: LOW CLOUDS WILL MOVE INTO THE AREA THIS MORNING WITH
MVFR CIGS MOST OF THE TIME TODAY AT KGGW AND KOLF AND THIS
AFTERNOON AT KSDY. SHOWERS AND THUNDERSTORMS ARE POSSIBLE AT TIMES
THIS AFTERNOON AND EVENING. LOW CLOUDS WILL CLEAR TONIGHT.
STRONG WEST WINDS ARE EXPECTED TO AT 20 TO 30 KNOTS WITH GUSTS
APPROACHING 40 KNOTS AT TIMES. WEST WINDS WILL DIMINISH TO 10 TO
15 KNOTS TONIGHT.
GGW WATCHES/WARNINGS/ADVISORIES
LAKE WIND ADVISORY UNTIL MIDNIGHT MDT TUESDAY NIGHT FOR CENTRAL
AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY-GARFIELD-
MCCONE-PETROLEUM.
HIGH WIND WARNING UNTIL 9 AM MDT TUESDAY FOR SOUTHWEST PHILLIPS.
WEATHER.GOV/GLASGOW
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