Flood in Grand County, Utah

Flood August 17, 2023 · Grand County, Utah

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

What the National Weather Service wrote

Heavy rain from thunderstorms over the Mill Creek drainage resulted in a spillover on Powerhouse Dam in Grand County. Radar estimated 0.80 to 1.10 inches of rain fell over the North Fork Mill Creek drainage.

The wider storm

As the ridge of high pressure moved into a more favorable position near the Southern Plains, eastern Utah was able to access the deeper monsoon moisture. This led to increased coverage of showers and thunderstorms. Storms were slow moving and produced heavy rain which led to some flooding in portions of Grand County.

Began near Moab (38.5720, -109.5490).

Source: NOAA Storm Events Database, event 1113842. Narratives are written by the National Weather Service forecast office that issued the report.

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