Severe Flood ● Closed
Flood Watch issued September 21 at 10:35PM MDT until September 25 at 12:00AM MDT by NWS Grand Junction CO, 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...Flooding caused by excessive rainfall is possible.
* WHERE...A portion of southwest Colorado, including the following
areas, San Juan River Basin and Southwest San Juan Mountains.
* WHEN...From Wednesday afternoon through Thursday evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- The ground remains saturated from recent heavy rainfall over the
past week. After a brief break, deep moisture is expected to
return to southwest Colorado Tuesday with a few inches of
rainfall possible during the Wednesday through Thursday
timeframe. In addition, multiple rounds of showers and
thunderstorms are expected Wednesday through Thursday evening
producing periods of heavy rainfall and potential flash flooding.
- http://www.weather.gov/safety/flood
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Southwest San Juan Mountains; San Juan River Basin |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Future |
| Cap Certainty | Possible |
| Cap Expires | 2026-09-22T17:00:00-06:00 |
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 27 days ago (Sep 22, 2026 04:36 UTC) · we last heard from WMO Alert Hub (national weather services) 30 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: Southwest San Juan Mountains; San Juan River Basin
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.