Severe Flood ● Closed
Flood Watch issued September 18 at 11:03AM MDT until September 20 at 6:00PM MDT by NWS Billings MT, United States of America
Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.
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.
* WHERE...All of South Central Montana, Portions of Southeast
Montana, and Sheridan County Wyoming.
* WHEN...From 6 PM MDT this evening 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...
- 1 to 2.5 inches of rainfall is expected across the watch area
tonight through Sunday. Locally heavier totals up to 4 inches are
possible where thunderstorm activity is more persistent.
- The Robertson Draw, East Side, Elk, and McGhee-Remington burn
scars are particularly vulnerable to Flash Flooding and debris
flows during the watch period. Any other burn scars from this
summer will have elevated Flash Flood potential as well.
- http://www.weather.gov/safety/flood
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Musselshell; Treasure; Northern Rosebud; Northern Stillwater; Powder River; Northern Park; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Future |
| Cap Certainty | Possible |
| Cap Expires | 2026-09-19T11:15:00-06:00 |
Official source
Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by WMO Alert Hub (national weather services).
View original reportAlso reported by: WMO
This event as JSON · API and licence
Source updated 31 days ago (Sep 18, 2026 17:04 UTC) · we last heard from WMO Alert Hub (national weather services) 38 seconds ago
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About this location
The agency did not publish coordinates for this warning. The pin is the centre of the country, not the location of the event — read the area name, not the map, for where it applies.
Area as the agency stated it: Musselshell; Treasure; Northern Rosebud; Northern Stillwater; Powder River; Northern Park; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern
Official authorities in United States
If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.
More for United States →What to do
Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.
Flood preparation, evacuation decisions, and the dangers of driving or walking through floodwater.
Open Flood Safety Guide →Earlier flood events in United States
Severe and extreme events of the same kind, before this one. Listed for scale, not because they are connected to it.
Nearby & related events
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.