Montana, Wyoming Severe Flood Watch | Effective 09/19/2026 21:40

Headline: 
Flood Watch issued September 19 at 10:40PM MDT until September 20 at 6:00PM MDT by NWS Billings MT
Event: 
Flood Watch
Urgency: 
Future
Effective: 
September 19, 2026 - 9:40pm
Expires: 
September 20, 2026 - 5:00pm
Description: 
A slow moving weather system will continue to impact the region through Sunday. The risk of flooding continues, especially over Southeast Montana and Northeast Wyoming. * WHAT...Flooding caused by excessive rainfall is possible, along with flash flooding over recent burn scars. * WHERE...All of South Central and Southeast Montana, and Sheridan County Wyoming. * WHEN...Through Sunday afternoon. * IMPACTS...Excessive runoff may result in flooding of creeks and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - The heaviest rainfall is slowly shifting over Southeastern Montana and Northeast Wyoming. The risk of flooding over south-centeral Montana is decreasing. - The Robertson Draw, East Side, Elk, and McGhee-Remington burn scars are particularly vulnerable to Flash Flooding and debris flows. Any other burn scars from this summer will have elevated Flash Flood potential as well. - http://www.weather.gov/safety/flood
Instruction: 
Monitor the latest forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Area Description: 
Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Northern Stillwater; Powder River; Carter; Northern Park; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern Rosebud; Judith Gap; Paradise Valley; Livingston Area; Beartooth Foothills; Absaroka/Beartooth Mountains; Crazy Mountains; Southern Big Horn; Southeastern Carbon; Northern Sweet Grass; Bighorn Canyon; Northern Carbon; Pryor/Northern Bighorn Mountains; Melville Foothills; Northeastern Yellowstone; Southern Wheatland; Southwestern Yellowstone; Northeast Bighorn Mountains; Sheridan Foothills
Forcast Office: 
NWS Billings MT
Sender: 
w-nws.webmaster@noaa.gov