Area Forecast Discussion
Issued by NWS Glasgow, MT
Issued by NWS Glasgow, MT
401 FXUS65 KGGW 311908 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT 108 PM MDT Thu Jul 31 2025 .DISCUSSION... KEY MESSAGES: 1) Scattered thunderstorms are possible mainly late tonight. 2) Periodic shower and thunderstorm chances will continue into early next week. WEATHER PATTERN OVERVIEW: A weak upper ridge with a relaxed jet stream will keep any thunderstorms from being severe through tomorrow. However, a strong one or two cannot be rulled out, bringing small hail and/or a strong wind gust. An upper low or disturbance this afternoon will help to generate scattered thunderstorms tonight across the CWA. Scattered thunderstorm chances will continue into mid-week next week as the jet stream brings disturbances in from the west as low level moisture remains high from recent rains. FORECAST CONFIDENCE & DEVIATIONS: Generally followed the NBM but models have moderate at best for confidence on placement of showers & thunderstorms. Latest NBM didn`t pick up on the thunderstorm near Glendive. TFJ && .AVIATION... Expected Flight Category: Mainly VFR. Discussion: There is moderate to high confidence all TAF sites will experience scattered storms this evening into the overnight. Gusty erraic winds and brief small hail is possible with these storms, but severe thunderstorms are not expected. Another round of thunderstorms are expected again Friday evening. Wind: Generally East to Southeast at about 10 kts gusting to 20 kts. TFJ && .GGW WATCHES/WARNINGS/ADVISORIES... None. && $$ weather.gov/glasgow