Headline:
Flood Watch issued September 18 at 10:30AM MDT until September 19 at 12:00AM MDT by NWS Pocatello ID
Event:
Flood Watch
Urgency:
Future
Effective:
September 18, 2026 - 9:30am
Expires:
September 18, 2026 - 11:00pm
Description:
* 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
Instruction:
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
Area Description:
Arco/Mud Lake Desert; Lower Snake River Plain; Marsh and Arbon Highlands; Franklin/Eastern Oneida Region; Bear River Range; Bear Lake Valley; Blackfoot Mountains; Caribou Range; Big Hole Mountains; Teton Valley; Centennial Mountains/Island Park; Beaverhead/Lemhi Highlands; Lost River Valleys; Challis/Pahsimeroi Valleys; Frank Church Wilderness; Sawtooth/Stanley Basin; Sun Valley Region; Wood River Foothills
Forcast Office:
NWS Pocatello ID
Sender:
w-nws.webmaster@noaa.gov