Severe Flood ● Closed
Flood Watch issued September 19 at 11:54AM MDT until September 20 at 6:00PM MDT by NWS Riverton WY, United States of America
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* WHAT...Flash flooding caused by moderate to heavy rainfall is
possible, especially in terrain and poor drainage areas.
* WHERE...Portions of central, north central, and northwest Wyoming,
including the following areas, in central Wyoming, Owl Creek and
Bridger Mountains. In north central Wyoming, Bighorn Mountains
Southeast, Bighorn Mountains West, Northeast Johnson County and
Southeast Johnson County. In northwest Wyoming, Absaroka Mountains,
Cody Foothills and Yellowstone National Park.
* WHEN...Through Sunday afternoon.
* IMPACTS...Excessive rainfall 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 and around
steep terrain.
* ADDITIONAL DETAILS...
- A slow moving weather system will move across Wyoming today and
Sunday and bring rounds of showers and thunderstorms to the
region, especially northern Wyoming. Any shower or thunderstorm
could produce moderate to heavy rainfall across the Watch Area.
- http://www.weather.gov/safety/flood
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Yellowstone National Park; Absaroka Mountains; Cody Foothills; Owl Creek and Bridger Mountains; Bighorn Mountains West; Bighorn Mountains Southeast; Northe |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Future |
| Cap Certainty | Possible |
| Cap Expires | 2026-09-20T07:00:00-06:00 |
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 reportThis event as JSON · API and licence
Source updated 30 days ago (Sep 19, 2026 17:55 UTC) · we last heard from WMO Alert Hub (national weather services) 1 second 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: Yellowstone National Park; Absaroka Mountains; Cody Foothills; Owl Creek and Bridger Mountains; Bighorn Mountains West; Bighorn Mountains Southeast; Northe
Official authorities in United States
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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.