Extreme Heat Lingers; Severe Thunderstorms for Portions of the Plains and Southeast; Heavy Rainfall Threats

Gusty winds and heavy rainfall may impact the Big Island of Hawaii as a nearby tropical system passes west of the islands. From the Southwest U.S., Rockies and across the Gulf Coast, heavy rainfall could lead to isolated flash flooding. Severe thunderstorms are expected for areas of the Plains, Gulf Coast and Southeast through Tuesday. Extreme heat lingers for the southern Plains and Southwest. Read More >

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Last Map Update: Mon, Aug 24, 2026 at 2:28:24 pm MDT

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National Weather Service Great Falls, MT

Air Quality Alert

Increasing Thunderstorms Tuesday-Thursday

Thunderstorms begin in southwest Montana and Lemhi County on Tuesday afternoon, expand in coverage to much of the Northern Rockies on Wednesday, then focus in western Montana on Thursday. Thunderstorms will be scattered in nature, rather than widespread with gusty outflow winds of 30-50 mph as a primary concern. Lightning may also lead to new fire starts. Storms will likely be a mix of dry/wet storms with wetting rains confined to storm cores.