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Severe · Flood WatchActive alert

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

Affecting Central Mountains; Lower Washington County; Zion National Park; Southern Mountains; Upper Sevier River Valleys; Bryce Canyon Country; South Central Utah; Capitol Reef National Park and Vicinity; Western Canyonlands; Glen Canyon Recreation Area/Lake Powell

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

Central Mountains; Lower Washington County; Zion National Park; Southern Mountains; Upper Sevier River Valleys; Bryce Canyon Country; South Central Utah; Capitol Reef National Park and Vicinity; Western Canyonlands; Glen Canyon Recreation Area/Lake Powell

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.

Read the original bulletin (official text)
* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...A portion of Utah, including the following areas, Central
Mountains, Bryce Canyon Country, Capitol Reef National Park and
Vicinity, Glen Canyon Recreation Area/Lake Powell, South Central
Utah, Southern Mountains, Upper Sevier River Valleys, Western
Canyonlands, Lower Washington County and Zion National Park.

* WHEN...From Wednesday morning 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 southern Utah
beginning Wednesday morning, and continuing through Thursday.
Local rainfall totals in excess of 3 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™