374
FXUS65 KGGW 040529
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
1129 PM MDT MON AUG 3 2026
KEY MESSAGES
- MUCH COOLER THIS MORNING LOWS IN THE 40S. TEMPS CLIMB THROUGH
THE WEEK, RETURNING TO LOW 90S BY THURSDAY.
- A GENERALLY DRY PATTERN IS EXPECTED THROUGH SUNDAY. INCREASES
IN PRECIPITATION ARE POSSIBLE BEGINNING MONDAY.
DISCUSSION
WEATHER PATTERN OVERVIEW:
AS THE UPPER TROUGH DEEPENS AND PUSHES EAST OUT OF THE REGION, IT
CONTINUES TO PUSH A COOLING AIRMASS SOUTHEASTWARD. WE'LL BE
SEEING MUCH BELOW AVERAGE TEMPERATURES THIS MORNING WITH LOWS IN
THE 40S. AN ISOLATED DIP INTO THE UPPER 30S WILL NOT BE OUT OF THE
QUESTION ACROSS THE NORTH.
LONGER TERM, ENSEMBLES FULLY EXIT THE TROUGH TO THE EAST BY
WEDNESDAY ALLOWING A NEW RIDGE TO ESTABLISH OVER THE PACIFIC
NORTHWEST. THIS WILL SLOWLY EXTEND INCREASING HEIGHT RISES AND
LOWERING RH VALUES OVER EASTERN MONTANA WITH NORTHWEST FLOW
ALOFT, BRINGING A STEADY INCREASE IN TEMPS AND GENERALLY DRY
WEATHER. HIGHS THURSDAY WILL REACH UP TO LOW 90S AND LOOK TO LAST
INTO THE BEGINNING OF THE NEXT WEEK. FRIDAY LOOKS TO BE THE
HOTTEST DAY AT THIS TIME. THE CURRENT RIDGE CREST LOOKS LIKE IT
MAY PASS THE REGION AROUND SUNDAY, WHICH COULD INTRODUCE INCREASED
CHANCES FOR RAIN THEREAFTER.
FORECAST CONFIDENCE & DEVIATIONS:
DEVIATIONS FROM NBM INCLUDED USING THE HRRRSMOKE DATA IN FOR VIS,
MOSTLY TO REMOVE ERRONEOUS NBM/GLAMP LOWERED VISIBILITIES.
GAH
AVIATION
LAST UPDATE: 0400Z
FLIGHT CAT RANGE: VFR
DISCUSSION: DRY CONDITIONS ARE EXPECTED THROUGH THE CYCLE WITH A
FEW MID TO HIGH CLOUDS.
WIND: NW TO W AT 5 TO 10 KTS THROUGH TONIGHT AND INTO THE MORNING
HOURS. INCREASING TO 10 TO 15 KTS DURING THE AFTERNOON. BECOMING
LIGHT AND VARIABLE INT HE EVENING.
GAH
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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