Flash Flood in Washington County, Utah

Flash Flood July 17, 2025 · Washington County, Utah

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Zion NP rangers reported flash flooding of Keyhole slot canyon along with other waterfalls coming developing along other eastern park slot canyons. Time is estimated.

The wider storm

A weak northern stream shortwave trough moving through the northwest CONUS resulted in the development of high based convection. Some of this convection resulted in strong to severe wind gusts. Additionally, a cutoff low placed off of the southwest CONUS helped advect moisture into southern Utah, leading to convection with periods of sufficiently heavy rain to result in flash flooding over some rain sensitive areas.

Began near Zion Lodge (37.2440, -112.9590).

Source: NOAA Storm Events Database, event 1270412. Narratives are written by the National Weather Service forecast office that issued the report.

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