890
FXUS65 KGGW 122021
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
221 PM MDT FRI JUN 12 2026
KEY MESSAGES
- WINDS AND ANY SHOWERS DIMINISH THIS EVENING.
- COOL AND BREEZY SATURDAY WITH A FEW SHOWERS OVER THE NE ZONES.
- COLD FRONT LATE TUESDAY WILL BRING SHOWERS AND THUNDERSTORMS.
SEVERE THUNDERSTORMS ARE NOT EXPECTED.
- COOL AND BREEZY WEDNESDAY.
- NO FIRE WEATHER CONCERNS THROUGH THE PERIOD.
DISCUSSION
WEATHER PATTERN OVERVIEW:
A STRONG UPPER LOW OVER CENTRAL CANADA WILL KEEP THE CANADIAN
POLAR AIRMASS ACROSS NORTHEAST MONTANA THROUGH THE WEEKEND.
IN THE MEANTIME, AN UPPER DISTURBANCE MOVING SOUTHEAST INTO
MONTANA TODAY (ALONG WITH A WEAK COLD FRONT) HAS HELPED TO
GENERATE SHOWERS AND THUNDERSTORMS ACROSS MAINLY CENTRAL MONTANA.
SOME OF THESE WILL MOVE SOUTHEAST MAINLY ACROSS THE CENTRAL AND
SOUTHERN ZONES THAT WILL DISSIPATE THIS EVENING BUT A WIND GUST
ABOUT 50-55 MPH CANNOT BE RULED OUT OVER THE SW ZONES LATE THIS
AFTERNOON. STRONGER/POSSIBLY SEVERE STORMS WILL STAY OVER CENTRAL
MONTANA.
SURFACE HIGH PRESSURE OVER ALBERTA WILL DRIFT INTO THE AREA
TONIGHT AND SATURDAY BUT SOME REMAINING INSTABILITY SATURDAY
AFTERNOON WILL LEAD TO NW WINDS AND SOME SHOWERS OVER AT LEAST THE
NORTHEAST ZONES.
SATURDAY NIGHT WILL BE THE COOLEST NIGHT IF CLOUDS CAN CLEAR OUT
OF THE AREA. IF THAT HAPPENS, TEMPS IN THE COOLER VALLEYS WOULD BE
IN THE UPPER 30S.
SUNDAY THROUGH TUESDAY: A SLIGHT WARMING TREND TAKES PLACE BEFORE
THE NEXT COLD FRONT ARRIVES TUESDAY EVENING. THIS COLD FRONT LOOKS
TO BRING ABOUT A QUARTER OF AN INCH OVER THE NORTHERN ZONES WITH
DRY CONDITIONS OVER PARTS OF THE SW ZONES.
COOLER AND BREEZY CONDITIONS ARE EXPECTED IN ITS WAKE WEDNESDAY
WITH HIGH TEMPS 5 TO 10 DEGREES BELOW NORMAL. A SLIGHT WARMING IS
EXPECTED THROUGH FRIDAY.
FORECAST CONFIDENCE & DEVIATIONS:
MADE SLIGHTS ADJUSTMENTS TO THE POPS AND WINDS FOR TODAY TO
ACCOUNT FOR SLIGHT UNDER FORECASTING OF BOTH RECENTLY. REST OF THE
FORECAST FOLLOWED THE NBM. TFJ
AVIATION
VFR.
A FEW SHOWERS MAY BE IN THE VICINITY OF KGGW AND KOLF THROUGH
ABOUT 01Z. THEN NW WINDS AND CLOUDS WILL DIMINISH THIS EVENING.
CUMULUS CLOUDS WILL INCREASE AGAIN SATURDAY LATE MORNING. SHOWERS
MAY ALSO RETURN SATURDAY AFTERNOON ALONG WITH A NW WIND AT ABOUT
15-20 WITH GUSTS TO 30 KTS. TFJ
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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