Dangerous Heat and Possible Flooding This Week

Hot temperatures and high humidity are forecast to continue across much of east Texas into the mid-Mississippi Valley through this week. Heavy to excessive rainfall occurring at times through Friday could bring areas of flooding across parts of the central Plains into the upper Midwest and Four Corners states. Read More >

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Last Map Update: Tue, Sep 15, 2026 at 2:00:18 am MDT

Watches, Warnings & Advisories

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National Weather Service Great Falls, MT

Frost Advisory

Valley Frost Tuesday Morning

Chilly morning temperatures will arrive across the region on Tuesday, September 15. Low temperatures are expected to drop into the low to mid-30s, bringing scattered to widespread frost. Areas most at risk include western Montana (primarily south of I-90) and higher-elevation valleys of north-central Idaho, with more widespread frost likely in sheltered locations and along the Continental Divide. Consider covering or bringing sensitive vegetation indoors Monday night.