Severe · Flood WatchActive alert

Flood Watch issued October 20 at 11:29AM MDT until October 23 at

Affecting Castle Country; San Rafael Swell

In effect until: Oct 21, 2026, 6:00 AM

Castle Country; San Rafael Swell

Possible impact zone; conditions develop through 6:00 AM.

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. People in the backcountry should ensure they have alternative routes available in case their primary route becomes impassable.

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Read the original bulletin (official text)

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...A portion of Utah, including the following areas, Castle
Country and San Rafael Swell.

* WHEN...From Wednesday afternoon through Thursday evening.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, dry washes, slot canyons, and other low-lying and
flood-prone locations such as slickrock areas and recent burn
scars.

* ADDITIONAL DETAILS...
- A late season surge of tropical moisture will bring widespread
moderate to at times heavy rainfall across much of eastern Utah
beginning Wednesday afternoon, and continuing through Thursday.
Local rainfall totals in excess of 2 inches are expected through
Thursday evening.
- All normally dry washes, small streams and mainstem rivers will
see elevated flows from this excessive rainfall, with periods of
heavier rainfall resulting in flash flooding. Backcountry roads
may become impassable due to flooding.
- http://www.weather.gov/safety/flood

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Flood Watch issued October 20 at 11:29AM MDT until October 23 at

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