Flash Flood Watch issued September 17 at 10:18AM MDT until September 20 at 12:00AM MDT by NWS Great Falls MT

* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Horse Gulch area and burn scars from the summer of 2026. * WHERE...Portions of central, north central, and southwest Montana, including the following areas, in central Montana, Big Belt, Bridger and Castle Mountains, Canyon Ferry Area, Elkhorn and Boulder Mountains, Gates of the Mountains, Little Belt and Highwood Mountains, Meagher County Valleys and Upper Blackfoot and MacDonald Pass. In north central Montana, Cascade County below 5000ft, Judith Basin County and Judith Gap and Western and Central Chouteau County. In southwest Montana, Gallatin Valley and Missouri Headwaters. * WHEN...From Friday evening through Saturday evening. * IMPACTS...Heavy rainfall over the Horse Gulch and Burn Scars of 2026 is expected up to and during the period of the watch. Residents near he Horse Gulch area and burn scars from the summer of 2026 should prepare for potential debris flow. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, urbanized street flooding, and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over recent burn scars, which may lead to flash flooding and debris flows. - Some locations that may experience flash flooding include... Areas near recent burn scars from the summer 2026 and the Horse Gulch area. -…

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