Area Forecast Discussion
Issued by NWS Glasgow, MT
Issued by NWS Glasgow, MT
239 FXUS65 KGGW 022054 AFDGGW Area Forecast Discussion National Weather Service Glasgow MT 254 PM MDT Tue Jun 2 2026 .KEY MESSAGES... - Another round of showers may affect the southeast zones late tonight then the northern zones Wednesday. - The next system brings showers/thunderstorms in from the west Thursday afternoon and night. && .DISCUSSION... WEATHER PATTERN OVERVIEW: The slow moving upper low will continue to bring cool and wet conditions to NE Montana over the next couple of days. Isolated showers are expected late tonight over the SE zones then the northern zones Wednesday. Wednesday evening will see the low shift east with drying weather conditions. For Thursday, the next shortwave will track in from the west with the next round of thunderstorms. Some of the storms in the afternoon and evening may offer heavy rainfall as moisture in the column (Precip Water) will be above normal, approaching an inch. The potential for a few stronger storms will also be monitored grazing our western then southern zones. Ensembles are also indicating a warm to hot day Saturday then a brief slight cooldown for Sunday. More concerning will be a prolonged SW upper flow that sets up. This time of year could mean higher than normal thunderstorms occurrences that could be severe. Flash flooding is also possible with Precip Water near or above an inch (normal is between 0.50-0.75"). FORECAST CONFIDENCE & DEVIATIONS: The Near term models earlier showed the possibility of isolated- scattered thunderstorms this afternoon over the SE zones, but the NBM downplayed it and that seems to be the way to go the next couple days. Therefore, will just ride with the NBM through the period. However, in the coming days, refining the finer details surrounding pops and thunderstorm chances for Thursday may be appropriate. TFJ && .AVIATION... UPDATED: 2050z FLIGHT CATEGORY: Mainly VFR. DISCUSSION: Cloud levels at KGGW and KOLF may drop to MVFR levels late tonight and not lift to VFR levels till Wednesday afternoon. Some rainshowers may affect KSDY and KGDV after 06z tonight. Winds will decrease early this evening. EQUIPMENT: KSDY obs are unavailable online and will be AMD NOT SKED. && .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