601
FXUS65 KGGW 280822
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
222 AM MDT SAT JUN 28 2025
DISCUSSION
KEY MESSAGES:
1) AN ISOLATED THUNDERSTORM IS POSSIBLE THIS EVENING ALONG THE
CANADIAN BORDER WEST OF OPHEIM.
2) LAKE WIND ADVISORY IN EFFECT FROM 8AM UNTIL 9PM FOR TODAY.
3) SEASONABLE WARM AND MAINLY DRY WEATHER IS EXPECTED FOR SUNDAY.
4) EXPECT THUNDERSTORMS TO RETURN BY THE MIDDLE OF NEXT WEEK WITH
A MORE ACTIVE WEATHER PATTERN.
WEATHER PATTERN OVERVIEW:
RADAR AND OBSERVATIONS SHOW LINGERING SHOWERS NEAR THE MT/ND
BORDER, ESPECIALLY NEAR SIDNEY AND SOUTH. THIS ACTIVITY WILL PUSH
EAST DURING THE MORNING HOURS. MEANWHILE, HIRES MODEL GUIDANCE
SHOWS SOME POTENTIAL THIS EVENING FOR AN ISOLATED THUNDERSTORM
ALONG THE CANADIAN BORDER, ESPECIALLY WEST OF OPHEIM.
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.
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 CHANCES FOR
THUNDERSTORMS MAKING A RETURN.
FORECAST CONFIDENCE & DEVIATIONS:
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 THIS WEEKEND, REDUCED ONLY BY THE OUTSIDE CHANCE FOR AN
ISOLATED THUNDERSTORM ALONG THE CANADIAN BORDER.
AVIATION
LAST UPDATED: JUNE 28, 2025 AT 0830Z.
FLIGHT CATEGORY: MAINLY VFR.
DISCUSSION: LOOK FOR MOSTLY SUNNY SKIES TODAY WITH HIGH PRESSURE
OVER THE REGION. EXCEPTIONS INCLUDE EXITING SHOWERS EARLY THIS
MORNING NEAR KSDY TO KGDV BUT REDUCED CEILINGS AND VISIBILITIES
ARE NOT ANTICIPATED.
WINDS: WEST TO NORTHWEST WINDS AROUND 5 TO 10 KTS WILL INCREASE TO
10 TO 15 KTS WITH GUSTS TO 25 KTS DURING AFTERNOON AND EVENING
HOURS.
GGW WATCHES/WARNINGS/ADVISORIES
LAKE WIND ADVISORY FROM 8 AM THIS MORNING TO 9 PM MDT THIS
EVENING FOR CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN
VALLEY-GARFIELD-MCCONE-PETROLEUM.
WEATHER.GOV/GLASGOW
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