327 FXUS65 KMSO 050858 AFDMSO Area Forecast Discussion National Weather Service Missoula MT 258 AM MDT Thu Jun 5 2025 .DISCUSSION... KEY MESSAGES: - Isolated PM showers today, primarily along the divide and higher terrain - Warming and drying trend through early next week A weak trough of low pressure will remain over the region today, bringing seasonable temperatures and another period of showers this afternoon and evening. The best chance for showers will be across northwest Montana, along the Continental Divide and in Lemhi County. High pressure will strengthen and build into the region Friday into early next week, bringing a significant warm up and generally dry conditions. Monday looks like the hottest day this week with many valleys reaching into the low 90s and nearing 100 for the lower valleys of north central Idaho. Isolated thunderstorms will be possible across Lemhi County and southwest Montana by Monday and Tuesday afternoons. Forecast models continue to show a change in the pattern by late next week, with around 70 percent of model solutions showing a trough of low pressure moving into the Pacific northwest by Friday. This solution would initially favor slightly cooler temperatures and thunderstorms, but could bring much cooler temperatures and possibly precipitation by the following weekend. && .AVIATION...A weak disturbance passing through the region in northerly flow will continue to favor afternoon showers and isolated thunderstorms, as far west as the Idaho/western Montana border. These showers may lead to brief MVFR ceilings and localized reduced visibility. KBTM and KSMN stand the best chance of seeing a shower through 06/0300z. Winds will generally be light and terrain driven. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. && $$