Active Weather Alerts
Flood Watch
Issued: 4:30 PM Sep. 18, 2026 – National Weather Service
...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING... * 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, Blackfoot Mountains, Caribou Range, Franklin/Eastern Oneida Region, Lower Snake River Plain and Marsh and Arbon Highlands. * WHEN...Through this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Storm drains and ditches may become clogged with debris. * ADDITIONAL DETAILS... - Heavy rainfall from thunderstorms is expected through this evening across central and eastern Idaho. Rainfall amounts in excess of 0.50" are possible, leading to flooding within burn scars, steep terrain, and urban areas. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. &&
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