Area Forecast Discussion
Issued by NWS Glasgow, MT
Issued by NWS Glasgow, MT
101 FXUS65 KGGW 221923 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT 123 PM MDT Fri Aug 22 2025 .DISCUSSION... KEY MESSAGES: - Mainly dry with light winds into next week with a gradual warm up. - Monsoonal moisture may make a return late next week with above normal temperatures. WEATHER PATTERN OVERVIEW: An upper low over south-central Canada will pull away from the area Saturday allowing for lighter winds and clear skies. Cooler and drier air in place will allow for a cool night to for many with lows in the 40s, except for areas near Fort Peck Lake. An upper ridge building over the Pacific NW this weekend will not move east much as the Canadian upper low will dig an upper trough to our east. This will result in plenty of sunshine over northeast Montana with light winds into the middle of next week. On Thursday, monsoonal moisture will move into Montana from the south and increase clouds. Temperatures will also rise but shouldn`t be oppressive with highs in the 80s to near 90. Shower chances look to be greatest over southern Montana late next week and it may take an upper low from the Pacific to bring them into our area beyond the forecast period or about next weekend. FORECAST CONFIDENCE & DEVIATIONS: Rode with the NBM but did knock them below NBM for temps tonight with the clear skies and light winds. TFJ && .AVIATION... UPDATED: 1925Z FLIGHT CAT RANGE: VFR. DISCUSSION: Scattered cumulus clouds and the NW winds will diminish this evening. Lighter winds and clear skies are expected Saturday. TFJ && .GGW WATCHES/WARNINGS/ADVISORIES... Lake Wind Advisory until 7 PM MDT this evening for Central and Southeast Phillips-Central and Southern Valley-Garfield-McCone- Petroleum. && $$ weather.gov/glasgow