Severe Flood ● Closed
Flash Flood Watch issued September 18 at 2:52AM MDT until September 18 at 10:00PM MDT by NWS Pocatello ID, 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.
* WHAT...Flash flooding and debris flows caused by excessive rainfall
are possible over the Big Rock burn scar.
* WHERE...A portion of southeast Idaho, including the following area,
Upper Snake River Plain.
* WHEN...Through this evening.
* IMPACTS...Heavy rainfall over the Big Rock burn scar is expected
during the period of the watch. Anyone in or near the Big Rock burn
scar should prepare for potential debris flow moving through the
Big Rock burn scar. Be sure to stay up to date with information
from local authorities. Heavy rainfall could trigger flash flooding
and debris flows in and near recent wildfire burn scars.
* ADDITIONAL DETAILS...
- National Weather Service Meteorologists are forecasting heavy
rainfall over the Big Rock burn scar, which may lead to flash
flooding and debris flows.
- Some locations that may experience flash flooding include...
Heise.
- http://www.weather.gov/safety/flood
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Upper Snake River Plain |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Future |
| Cap Certainty | Possible |
| Cap Expires | 2026-09-18T22:00:00-06:00 |
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 reportAlso reported by: WMO
This event as JSON · API and licence
Source updated 31 days ago (Sep 18, 2026 08:53 UTC) · we last heard from WMO Alert Hub (national weather services) 44 seconds ago
On a slow connection? Low-bandwidth version — no map, no scripts, under 14 KB.
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: Upper Snake River Plain
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.