Montana, Wyoming Severe Flood Watch | Effective 09/20/2026 12:56

Headline: 
Flood Watch issued September 20 at 1:56PM MDT until September 20 at 6:00PM MDT by NWS Billings MT
Event: 
Flood Watch
Urgency: 
Future
Effective: 
September 20, 2026 - 12:56pm
Expires: 
September 20, 2026 - 5:00pm
Description: 
Showers continue over southeast Montana and northern Wyoming today. A few thunderstorms may develop as well. The risk of flooding continues. * WHAT...Flooding caused by excessive rainfall is possible, along with flash flooding over recent burn scars. * WHERE...Southeast Montana and Sheridan County Wyoming. * WHEN...Until 6 PM MDT this evening. * 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. The risk of flooding will diminish late this afternoon and evening as showers taper off. * ADDITIONAL DETAILS... - The heaviest rainfall is slowly shifting eastward to southeast Montana and northeast Wyoming. - The 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; Powder River; Carter; Northern Big Horn; Southern Rosebud; Southern Big Horn; Bighorn Canyon; Pryor/Northern Bighorn Mountains; Northeastern Yellowstone; Southwestern Yellowstone; Northeast Bighorn Mountains; Sheridan Foothills
Forcast Office: 
NWS Billings MT
Sender: 
w-nws.webmaster@noaa.gov