Science Centre Cross Country Ski Trails Snow Report

643 FXUS65 KGGW 250600 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT 1200 AM MDT Sat Jul 25 2026 .KEY MESSAGES... - Dangerously hot high temperatures near 100 degrees are expected for today and Sunday. Look for little overnight recovery with lows tonight in the mid 60s to the mid 70s. - Isolated to scattered dry thunderstorms are possible during this afternoon and evening. A few may be severe with particularly strong wind gusts in excess of 60 mph. - The hot and dry weather conditions will raise fire weather concerns at times over the next few days. A Red Flag Warning remains in effect for portions of the area for Saturday due to lightning. && .DISCUSSION... WEATHER PATTERN OVERVIEW: Upper ridging over the western U.S. will remain the dominant force this weekend with triple digit heat during the afternoon hours today and Sunday. Low temperatures tonight will struggle to get down to the mid 60s to mid 70s, making for uncomfortable sleeping conditions for those without air conditioning. Will continue the Extreme Heat Warning through 10pm Sunday evening. There will be enough instability with a shortwave trough approaching from the southwest this afternoon and evening to initiate a few dry thunderstorms. HREF max ensemble wind gust guidance continues to support the potential for damaging wind gusts as a primary threat, further noting the inverted-v forecast soundings across the area. A Red Flag Warning for fire zones 134, 135, 136, and 137 continues for this afternoon due to the lightning risk on dry fuels. As an aside, haze and some smoke will continue at times to be a problem from upstream wildfires. Ensembles continue to show the hot temperatures continuing through at least the early and middle part of next week, with highs in the 90s to around 100 degrees each day. FORECAST CONFIDENCE & DEVIATIONS: Pops were adjusted for consistency and collaboration with neighbors in support of near term high resolution guidance. There is above average confidence for hot temperatures through the balance of the weekend and into the first part of next week, with only some uncertainty due to impact from smoke and haze. Confidence is above average for isolated convective coverage at least this evening, though lower for specific timing and placement. && .AVIATION... UPDATE TIME: Saturday July 25 at 0545Z. FLIGHT CATEGORY: VFR prevailing, temporary MVFR possible with visibility reductions in thunderstorms and in haze. SYNOPSIS: Upper ridging will continue to provide hot temperatures to the region. Haze will continue to be possible at times due to smoke from upstream wildfires. Isolated to widely scattered thunderstorms are possible during afternoon and evening hours, which could track near area terminals. The primary timing would be from 22-04Z. DENSITY ALTITUDE: Issues are expected at times with high temperatures near 100 today and Sunday. WINDS: Light and variable will become south to southeast this evening at around 5 to 8 kts. && .GGW WATCHES/WARNINGS/ADVISORIES... Extreme Heat Warning until 10 PM MDT Sunday for Central and Southeast Phillips-Central and Southern Valley-Daniels-Dawson- Eastern Roosevelt-Garfield-McCone-Northern Phillips-Northern Valley-Petroleum-Prairie-Richland-Sheridan-Southwest Phillips- Western Roosevelt-Wibaux. Red Flag Warning from 4 PM to 10 PM MDT Saturday for Northern Valley and Northern Phillips Counties-Southern Petroleum and Southern Garfield Counties-The Little Rockies-The Lower Missouri River Breaks including the Charles M Russell National Wildlife Refuge. && $$ weather.gov/glasgow