045
FXUS65 KGGW 281116
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
516 AM MDT SUN JUN 28 2026
KEY MESSAGES
- ACTIVE WEATHER IS EXPECTED THROUGH TUESDAY WITH HEAVY RAIN
POSSIBLE AT TIMES.
- TEMPERATURES WARM STARTING ON TUESDAY AND GET WARMER EACH DAY
THROUGH FRIDAY.
DISCUSSION
WEATHER PATTERN OVERVIEW:
THE UPPER LOW WILL SLOWLY MOVE ACROSS MONTANA THROUGH MONDAY WITH
COOL TEMPERATURES AND FREQUENT SHOWERS WITH THUNDERSTORMS AT
TIMES. WITH VERY SATURATED GROUND, ANY STORMS WITH HEAVY RAIN
COULD PRODUCE ADDITIONAL FLOODING ISSUES. WINDS WILL INCREASE ON
THE BACK SIDE OF THE SYSTEM WITH COLD AIR ADVECTION LEADING TO
LAKE WIND CONDITIONS FOR THIS AFTERNOON AND EVENING.
WITH THE UPPER TROUGH MOVING EAST BY MIDWEEK, TEMPERATURES WILL BE
ON THE RISE INTO THE HOLIDAY WEEKEND. FAIRLY PERSISTENT WEAK
TROUGH OVER THE PACIFIC NORTHWEST WILL SUPPORT OCCASIONAL CHANCES
FOR SHOWERS AND STORM ACTION.
FORECAST CONFIDENCE & DEVIATIONS:
BLENDED NBM90 INTO THE WIND FORECAST, TO ACCOUNT FOR RECENT
UNDER PERFORMANCE WITH WIND SPEEDS.
THERE IS MODERATE CONFIDENCE IN RAINFALL AMOUNTS THROUGH MONDAY
AND IN TEMPERATURES CLIMBING ABOVE AVERAGE IN EARLY JULY.
AVIATION
VFR TO MVFR. SCATTERED SHOWERS AND THUNDERSTORMS WILL PERSIST
ACROSS THE REGION TODAY WITH PATCHY LOW CLOUDS AND FOG.
GGW WATCHES/WARNINGS/ADVISORIES
LAKE WIND ADVISORY FROM NOON TODAY TO 2 AM MDT MONDAY FOR
CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY-
GARFIELD-MCCONE-PETROLEUM.
WEATHER.GOV/GLASGOW
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