


Area Forecast Discussion
Issued by NWS Glasgow, MT
Issued by NWS Glasgow, MT
221 FXUS65 KGGW 071916 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT 116 PM MDT Mon Jul 7 2025 .DISCUSSION... KEY MESSAGES: 1) Hot weather will return Tuesday and Wednesday with highs in the 90s to near 100. 2) Cooler conditions to follow Thursday and Friday with gusty NW winds on Thursday. 3) Isolated to scattered showers/thunderstorms expected with a cold front Wednesday night through Friday morning. WEATHER PATTERN OVERVIEW: mainly sunny/clear conditions will linger into Wednesday as an upper ridge will build into eastern Montana. With W or SW flow (and compressional warming), temperatures will warm with highs in the upper 80s and 90s Tuesday, 90s to low 100s Wednesday. This will lower humidities that will be in the teens in most areas on Wednesday. At this point, west to SW winds will be less than 15 mph. Elevated fire weather conditions are possible with the low RH but more wind would be needed for critical fire weather conditions to occur. Heat impact levels are currently forecasted to high enough along and south of US Highway 2 that a Heat Advisory may be needed on Wednesday. An upper trough moves across the Canadian Prairies Wednesday night and Thursday which will bring a cold front through NE Montana Thursday morning with cooler temperatures. The system will bring a chance of showers and thunderstorms Wednesday night and possibly Thursday Night. However, more thunderstorms than showers Wednesday night which could provide fire starts. Strong NW winds are possible Thursday with a Lake Wind Advisory possible on Fort Peck Lake. Cooler air is expected Thursday and Friday then warmer temperatures return for the weekend as the upper trough moves to the east. FORECAST CONFIDENCE & DEVIATIONS: There is high confidence of temperatures reaching the 90s to near 100 for many locations by Wednesday. No deviations from the NBM at this time. && .AVIATION... LAST UPDATED: 2000Z FLIGHT CAT RANGE: VFR. DISCUSSION: Clear skies this evening then some mid-level clouds will move in late tonight then mainly clear Tuesday. WINDS: Light and variable this evening then E at light speeds beginning first at KGGW. TFJ && .GGW WATCHES/WARNINGS/ADVISORIES... None. && $$ weather.gov/glasgow