352
FXUS65 KGGW 301915
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
115 PM MDT THU APR 30 2026
KEY MESSAGES
- WARMER TEMPERATURES ARE SET TO MOVE INTO THE REGION BEGINNING
FRIDAY, AND CONTINUING INTO THE WEEKEND.
- MOST OF THE SHOWER CHANCES THIS WEEKEND WILL REMAIN ACROSS
WESTERN, CENTRAL, AND SOUTHERN PORTIONS OF MONTANA.
- UNSETTLED WEATHER MAY RETURN EARLY NEXT WEEK.
DISCUSSION
WEATHER PATTERN OVERVIEW:
ASIDE FROM A FEW MID LEVEL CLOUDS, QUIET WEATHER WILL BE IN STORE
FOR FRIDAY INTO THE UPCOMING WEEKEND ACROSS NE MONTANA. UPPER
RIDGING WILL NOSE ITS WAY IN FROM THE WEST ALLOWING LARGE SCALE
SUBSIDENCE AND WARMING TEMPERATURES. MEAN NBM GUIDANCE CONTINUES
TO SHOW SUPPORT FOR HIGHS INTO THE 60S AND 70S DURING THIS TIME.
MEANWHILE, THE RIDGE WILL SHOWCASE SOME FLATTENING LATE INTO THE
WEEKEND AND EARLY NEXT WEEK ON NORTHWEST UPPER FLOW WITH AN
EVENTUAL SPLIT FLOW PATTERN EMERGING AS A CLOSED LOW SETS UP OVER
THE SOUTHWESTERN U.S. THE NORTHERN NORTHWEST FLOW BRANCH OVER
EASTERN MONTANA MAY ALLOW SHORTWAVES TO TRAVERSE WITH OCCASIONAL
SHOWER CHANCES.
FORECAST CONFIDENCE & DEVIATIONS:
WINDS WERE MODESTLY NUDGED ABOVE NBM THIS AFTERNOON TO REFLECT
GUSTY CONDITIONS EXPECTED DURING PEAK BOUNDARY LAYER MIXING.
OTHERWISE, NBM WAS VERY RELIABLE IN PRODUCING A HIGH CONFIDENCE
FORECAST TOWARD WARMER TEMPERATURES AND DRY WEATHER THROUGH THE
WEEKEND. CONFIDENCE IS LOWER HOWEVER AT LARGER TIME SCALES INTO
NEXT WEEK ON TIMING AND PLACEMENT OF PRECIPITATION CHANCES.
AVIATION
UPDATED: THURSDAY APRIL 30, 2026 AT 1915Z.
FLIGHT CATEGORY: VFR.
DISCUSSION: QUIET WEATHER LOOKS TO CONTINUE AMID MID LEVEL
CLOUDINESS.
WINDS: NORTH TO NORTHWEST WINDS ARE EXPECTED THIS AFTERNOON
RANGING 10 TO 20 KTS, BECOMING LIGHT AND VARIABLE OVERNIGHT.
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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