NWS Forecast Office Great Falls, MT

Showers and thunderstorms develop this afternoon and track north-northeast through this evening, mainly along and east of I-15. These will be fast moving storms with lightning and localized stronger wind gusts. If recreating, be alert for thunderstorms and have a plan in case lightning strikes!

Much cooler air moves into the region with a Pacific weather system tonight through Sunday night. In addition to the cooler temperatures, some higher elevation locations may see a brief period of wet snow Sunday morning and there is a high risk of frost Sunday night in most southwest MT valleys. #MTwx