327
FXUS65 KGGW 281951
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
151 PM MDT SAT JUN 28 2025
DISCUSSION
KEY MESSAGES:
1) AN ISOLATED THUNDERSTORM IS POSSIBLE THIS EVENING FROM THE
LITTLE ROCKIES TO ALONG THE CANADIAN BORDER.
2) LAKE WIND ADVISORY IN EFFECT UNTIL 9PM FOR TODAY.
3) SEASONABLY WARM AND MAINLY DRY WEATHER IS EXPECTED THROUGH
TUESDAY.
4) EXPECT THUNDERSTORMS TO RETURN BY THE MIDDLE OF NEXT WEEK WITH
A MORE ACTIVE WEATHER PATTERN.
WEATHER PATTERN OVERVIEW:
WHILE SKIES HAVE MOSTLY CLEARED ACROSS THE AREA EARLY THIS
AFTERNOON, CUMULUS IS DEVELOPING OVER PHILLIPS AND NORTHERN VALLEY
COUNTIES. THIS IS WHERE HI-RES MODEL GUIDANCE CONTINUES TO SHOW
SOME POTENTIAL THIS EVENING FOR ISOLATED THUNDERSTORMS ALONG THE
CANADIAN BORDER.
UPPER RIDGING ACROSS THE WESTERN U.S. EXTENDS INTO MONTANA
OTHERWISE THIS WEEKEND. THIS LARGE SCALE SUBSIDENCE WILL DRIVE
SEASONABLY WARM AND DRY WEATHER CONDITIONS OVER THE WEEKEND FOR
THE MOST PART, EXTENDING INTO EARLY NEXT WEEK. THE PATTERN MAKES
WIDESPREAD 90S LIKELY, BUT NO EXTREME HEAT CONCERNS TO START THE
FIRST FEW DAYS OF JULY.
DURING THE MIDWEEK, ENSEMBLES POINT TO THE RIDGE TRANSLATING EAST
WITH NEW LOW PRESSURE SYSTEM ARRIVING FROM THE WEST. THIS MAY
ENSURE A RETURN TO MORE ACTIVE WEATHER WITH DAILY CHANCES FOR
THUNDERSTORMS MAKING A RETURN.
FORECAST CONFIDENCE & DEVIATIONS:
THE NBM WAS LARGELY USED THIS FORECAST CYCLE WHICH CAPTURED
TRENDS WELL. AN EXCEPTION WAS TO BLEND IN NBM90 INTO THE SHORT
TERM WINDS TO BEST REFLECT THE LAKE WIND ADVISORY FOR FORT PECK
LAKE.
CONFIDENCE IS MEDIUM TO HIGH FOR SEASONABLY WARM AND DRY
CONDITIONS FOR THE NEXT FEW DAYS, REDUCED ONLY BY THE OUTSIDE
CHANCE FOR AN ISOLATED THUNDERSTORM ALONG THE CANADIAN BORDER THIS
WEEKEND.
AVIATION
LAST UPDATED: JUNE 28, 2025 AT 1930Z
FLIGHT CATEGORY: VFR
DISCUSSION: LOOK FOR MOSTLY SUNNY SKIES TODAY WITH HIGH PRESSURE
OVER THE REGION. THERE IS HIGH CONFIDENCE THAT ANY ISOLATED
THUNDERSTORMS THIS EVENING REMAIN NORTH OF KGGW.
WINDS: WEST TO NORTHWEST WINDS AT 10-20 KTS WITH GUSTS AROUND 25
KTS DURING AFTERNOON AND EARLY EVENING HOURS, DROPPING TO 5-10
KTS OVERNIGHT INTO THE MORNING.
GGW WATCHES/WARNINGS/ADVISORIES
LAKE WIND ADVISORY UNTIL 9 PM MDT THIS EVENING FOR CENTRAL AND
SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY-GARFIELD-MCCONE-
PETROLEUM.
WEATHER.GOV/GLASGOW
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