Heavy Rainfall in the Southern Plains and Mississippi Valley; Thunderstorms in Eastern Colorado on Thursday

A multiple day heavy rainfall event will begin to set up from the Southern Plains into the Mississippi Valley Thursday, peaking in intensity over the holiday weekend. Widely scattered thunderstorms are expected to develop across eastern Colorado Thursday afternoon and evening. Large hail will be the primary hazard. Read More >

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Last Map Update: Thu, May 21, 2026 at 12:02:26 pm MDT

Watches, Warnings & Advisories

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National Weather Service Great Falls, MT

Winter Storm Warning

Frost Advisory

Warm and Dry Weekend

A ridge of high pressure will be building over the region Friday into the weekend causing warming and drying. Most valley locations should be in the 70s by Saturday with the lower valleys of north central Idaho approaching the 90 degree mark.