749
FXUS65 KGGW 300752
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
152 AM MDT FRI MAY 30 2025
DISCUSSION
KEY MESSAGES:
- ISOLATED SHOWERS AND THUNDERSTORMS AND GUSTY NW WINDS TODAY
WITH FRONTAL BOUNDARY MOVING THROUGH NORTHEAST MONTANA.
- OTHERWISE, MAINLY DRY WEATHER AND SLOWLY WARMING TEMPERATURES
WILL CONTINUE THROUGH SATURDAY.
- SUNDAY WILL BE THE WARMEST DAY WITH A CHANCE OF MAINLY EVENING
THUNDERSTORMS.
- POSSIBLE ON AND OFF AGAIN SHOWERS POSSIBLE STARTING SUNDAY
NIGHT AND CONTINUING FOR SEVERAL DAYS WITH COOLER TEMPERATURES.
WEATHER PATTERN OVERVIEW:
SHORTWAVE TROUGH IS BRINGING A FRONT THROUGH EASTERN MONTANA TODAY
WITH ISOLATED SHOWERS AND THUNDERSTORMS. BEHIND THE FRONT, THERE
WILL BE GUSTY NORTHWEST WINDS. GUSTS TO 40 MPH ARE POSSIBLE ON
FORT PECK LAKE SO A LAKE WIND ADVISORY REMAINS IN EFFECT FROM 9
AM UNTIL 7 PM.
TONIGHT, THE UPPER RIDGE REBOUNDS AND BRINGS WARM TO HOT
CONDITIONS FOR THE AREA THIS WEEKEND. EXPECT HIGHS IN THE 80S AND
90S (SUNDAY).
HRRR SMOKE MODEL BRING SMOKE FROM CANADIAN WILDFIRES INTO THE NE
HALF OF THE FORECAST AREA TONIGHT AND SATURDAY. NOT SURE HOW MUCH
OF THIS SMOKE WILL BE SURFACE SMOKE VERSUS SMOKE ALOFT AT THIS
TIME. WILL MENTION PATCHY SMOKE FOR NOW.
A COLD FRONT MOVES IN SUNDAY THAT'S FOLLOWED BY INSTABILITY AND
UPPER LEVEL JET ENERGY THAT COULD GIVE THE AREA A WETTING RAIN FOR
SUNDAY NIGHT THROUGH TUESDAY.
AFTERWARD, TEMPERATURES BEGIN TO REBOUND WEDNESDAY AND THURSDAY AS
THE RAINSHOWERS SLOWLY PULL OUT.
FORECAST CONFIDENCE & DEVIATIONS:
HIGH CONFIDENCE ON THE WARMING TREND THROUGH SUNDAY. LOW
CONFIDENCE OF ANY PRECIPITATION CHANCES UNTIL SUNDAY NIGHT.
INCREASED WIND SPEEDS A FEW KNOTS TODAY AND MADE POPS COVER A
WIDER AREA THAN THE NBM HAD AT TIMES TODAY AND ALIGNED THE
AFTERNOON THUNDERSTORM CHANCES IN THE EAST CLOSER TO SPC FORECAST.
NO DEVIATIONS TONIGHT AND BEYOND.
AVIATION
LAST UPDATED: 0800Z
FLIGHT CAT RANGE: VFR.
LLWS: LOW LEVEL WIND SHEAR WILL BE POSSIBLE FROM 10-15Z ACROSS
KOLF AND KGGW.
DISCUSSION: A COLD FRONT WILL MOVE IN THIS MORNING WITH
INCREASING NW WINDS. EXPECT GUSTS TO EXCEED 30 KTS THIS
AFTERNOON. ISOLATED SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY
ALONG AND NEAR THE FRONT.
WIND: SE AT 5 TO 10 KNOTS EARLY. THEN, VEERING W TO NW AROUND 12Z
AT KGGW, BY 15Z AT KOLF AND KGDV AND 18Z AT KSDY. WIND SPEED WILL
INCREASE TO 15 TO 25 KNOTS GUSTING TO 30 KNOTS THIS AFTERNOON. NW
WINDS WILL DIMINISH THIS EVENING AND BECOME LIGHT AND VARIABLE
OVERNIGHT.
GGW WATCHES/WARNINGS/ADVISORIES
LAKE WIND ADVISORY FROM 9 AM THIS MORNING TO 7 PM MDT THIS
EVENING FOR CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN
VALLEY-GARFIELD-MCCONE-PETROLEUM.
WEATHER.GOV/GLASGOW
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