Future

A strong and slow moving weather system will impact the region tonight through Sunday. Well above normal atmospheric moisture levels combined with the dynamics from this storm system will provide the potential for heavy rainfall during this period. Thunderstorms embedded in the more general rainfall will have the potential to produce flash flooding, particularly over recent burn scars. * WHAT...Flooding caused by excessive rainfall is possible, along with Flash Flooding of recent burn scars.

A strong and slow moving weather system will impact the region tonight through Sunday. Well above normal atmospheric moisture levels combined with the dynamics from this storm system will provide the potential for heavy rainfall during this period. Thunderstorms embedded in the more general rainfall will have the potential to produce flash flooding, particularly over recent burn scars. * WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Custer county. * WHEN...From 6 PM MDT this evening through Sunday afternoon.

* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Wapiti, Crooked, Buckhorn burn scar areas. * WHERE...Portions of south central and southwest Idaho, including the following areas, in south central Idaho, Western Magic Valley. In southwest Idaho, Boise Mountains, Camas Prairie, Lower Treasure Valley, Upper Treasure Valley and West Central Mountains. * WHEN...Through this evening. * IMPACTS...Heavy rainfall over the Wapiti, Crooked, Buckhorn burn

* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of central, eastern, and southeast Idaho, including the following areas, in central Idaho, Challis/Pahsimeroi Valleys, Frank Church Wilderness, Lost River Valley, Sawtooth/Stanley Basin, Sun Valley Region and Wood River Foothills. In eastern Idaho, Beaverhead - Lemhi Highlands, Big Hole Mountains, Centennial Mountains - Island Park and Teton Valley. In southeast Idaho, Arco/Mud Lake Desert, Bear Lake Valley, Bear River Range,

The Flash Flood Watch for the Big Rock burn scar is being replaced with a more broad Flash Flood Watch across eastern Idaho. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...The Canyon Ferry Area, Helena Valley, and Meagher County Valleys in Central Montana * WHEN...From 6 PM MDT this evening through Saturday afternoon. * IMPACTS...Excessive runoff may result in flooding of low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Showers and thunderstorms capable of producing hourly rainfall rates of between 0.25 inch to 0.5 inch are possible. - Some locations impacted include Helena, Townsend, and White

* 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...A portion of central Montana, including the following areas, Big Belt, Bridger and Castle Mountains, Elkhorn and Boulder Mountains and Little Belt and Highwood Mountains. * WHEN...From 6 PM MDT this evening through Saturday evening. * IMPACTS...Heavy rainfall over the Horse Gulch area and burn scars from the summer of 2026 is expected up to and during the period of

The Flash Flood Watch has been changed to a Flood Watch. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

* WHAT...Flash flooding and debris flows caused by excessive rainfall continue to be possible over the Sand Creek and Bobcat Lakes Burn Scars. * WHERE...A portion of southwest Montana, including the following area, Northwest Beaverhead County. * WHEN...From 3 PM MDT this afternoon through Saturday afternoon. * IMPACTS...Heavy rainfall over the Sand Creek and Bobcat Lakes Burn Scars is expected up to and during the period of the watch. Residents near the Sand Creek and Bobcat Lakes Burn Scars should

ESFRIW A wet weather system will support periods of showers and thunderstorms across Wyoming Friday, Saturday, and Sunday. This weather system is funneling abundant tropical moisture into the state. Given this anomalously high moisture, many thunderstorms will feature heavy rainfall, possibly leading to localized flooding. Poor drainage areas, urban areas, and steep terrain will be the most susceptible locations for this isolated flooding. Many locations could see rainfall totals anywhere between 0.75" to