041
FXUS65 KGGW 291448
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
848 AM MDT THU MAY 29 2025
DISCUSSION
845 AM UPDATE: SOME OF THE HAZE FROM CANADA WILL CONTINUE TO MOVE
SOUTH INTO THE AREA. THE HRRR MODEL HAS CAUGHT ONTO SOME OF THIS
AND HAVE ADDED THIS INTO THE FORECAST GRIDS THROUGH TONIGHT FOR
MAINLY THE WESTERN ZONES (PHILLIPS, GARFIELD AND PETROLEUM
COUNTIES).
ALSO LOOKED AT WINDS FOR MAINLY TOMORROW AFTERNOON, INCREASING
THEM AS SOME STRONG WIND GUSTS LOOK VERY POSSIBLE. WILL PROBABLY
ISSUE A LAKE WIND ADVISORY FOR TOMORROW. TFJ
PREVIOUS DISCUSSION...
KEY MESSAGES:
- GENERALLY DRY CONDITIONS AND SLOWLY WARMING TEMPERATURES WILL
CONTINUE THROUGH SATURDAY.
- SUNDAY WILL BE THE WARMEST DAY WITH A CHANCE OF AFTERNOON AND
EVENING THUNDERSTORMS.
- WIDESPREAD RAIN AND COOLER TEMPERATURES POSSIBLE STARTING
SUNDAY NIGHT AND CONTINUING FOR SEVERAL DAYS.
WEATHER PATTERN OVERVIEW:
UPPER LOW OVER THE UPPER MIDWEST WILL SLOWLY DRIFT EAST AS AN
UPPER RIDGE BUILDS INTO THE NORTHERN ROCKIES. THIS WILL LEAD TO A
GENERAL WARMING TREND ACROSS EASTERN MONTANA UNTIL A COLD FRONT
MOVES THROUGH THE AREA EITHER SUNDAY OR SUNDAY NIGHT. A WEAK
SHORTWAVE WILL SLIDE THROUGH THE RIDGE ON FRIDAY, WITH SLIGHT
CHANCE OF SHOWERS IN THE NORTH. COLD FRONT WITH THE WAVE FRIDAY
MORNING WILL BRING STRONGER NORTHWEST WINDS, WHICH MAY BE ENOUGH
FOR A LAKE WIND ADVISORY. TEMPERATURES QUICKLY REBOUND ON SATURDAY
WITH THE AXIS OF UPPER RIDGE MOVING THROUGH EASTERN MONTANA.
DEPENDING ON THE TIMING OF THE COLD FRONT ON SUNDAY, MOST AREAS
WILL HAVE THEIR WARMEST DAY ON SUNDAY WITH HIGHS NEAR 90 IN THE
EAST. WESTERN ZONES WHICH SHOULD SEE THE FRONT DURING THE MORNING
WILL LIKELY HAVE SATURDAY BE THE WARMEST DAY.
BEYOND THIS WEEKEND, AN UPPER TROUGH/LOW MOVING INTO THE PACIFIC
NORTHWEST WILL DISPLACE THE RIDGE, AND LEAD TO COOLER AND WETTER
WEATHER FOR THE FIRST WEEK OF JUNE.
FORECAST CONFIDENCE & DEVIATIONS:
HIGH CONFIDENCE ON THE WARMING TREND THROUGH SUNDAY. LOW
CONFIDENCE OF ANY PRECIPITATION CHANCES UNTIL SUNDAY NIGHT.
PRETTY MUCH WENT WITH THE NBM THROUGH THE ENTIRE 7 DAY PERIOD.
AVIATION
LAST UPDATED: 1445Z
FLIGHT CAT RANGE: VFR.
DISCUSSION: SOME DAYTIME CUMULUS ARE POSSIBLE THIS AFTERNOON.
HAZE IN MID AND HIGH LEVELS FROM A WILDFIRE IN SASKATCHEWAN WILL
ALSO BE VISIBLE TODAY AND TONIGHT AND COULD CAUSE SOME LIMITATIONS
WITH SLANTWISE VISIBILITY. OTHERWISE, SKIES WILL BE MOSTLY
CLEAR.
WIND: SE TO SOUTH TODAY 5 TO 15 KNOTS DIMINISHING TO 5 TO 10 KNOTS
TONIGHT. TFJ
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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