Area Forecast Discussion
Issued by NWS Glasgow, MT
Issued by NWS Glasgow, MT
111 FXUS65 KGGW 031911 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT 111 PM MDT Thu Jul 3 2025 .DISCUSSION... KEY MESSAGES: 1) Scattered thunderstorms this evening could bring an outside chance for strong winds and/or hail in the Yellowstone valley. 2) A cold front tonight will begin to cool the area off. 3) An upper low moving in Saturday will bring even cooler conditions with areas of showers. WEATHER PATTERN OVERVIEW: The next batch of thunderstorms will move northeast this evening across the southeast zones. With marginal shear and instability, they are not expected to be severe, however one or two could be strong. Cooler conditions will move in on the heels of a cold front tonight then an upper low Saturday. Look for even cooler conditions Saturday with areas of rain showers. On Sunday, we begin to dry out and warm up a bit as the upper low gradually moves out. Look for weak upper ridging next week but an upper low from British Columbia begins to move in late in the week. FORECAST CONFIDENCE & DEVIATIONS: NBM was largely used here for the forecast population. Pops through tonight were mainly blended with the SREF and CONShort. TFJ && .AVIATION... LAST UPDATED: 2000Z FLIGHT CAT RANGE: VFR. DISCUSSION: Scattered showers and isolated thunderstorms will move northeast across KSDY and KGDV airfields this evening. Any heavy rain and lower celings should remain SE of the airfields. WIND: West northwest at 10 to 20 knots this afternoon becoming light tonight. Gusty erratic wind is possible around any thunderstorms. TFJ && .GGW WATCHES/WARNINGS/ADVISORIES... Heat Advisory until 8 PM MDT this evening for Dawson-Eastern Roosevelt-McCone-Prairie-Richland-Western Roosevelt-Wibaux. && $$ weather.gov/glasgow