Flash Flood in Grant County, Oregon

Flash Flood May 25, 2018 · Grant County, Oregon

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

What the National Weather Service wrote

Heavy rain from slow moving thunderstorms caused rock slides and water on roadways within an area that includes Mount Vernon, John Day and Canyon City in Grant county. Water entered a business through the front door in Mount Vernon. Rock slides occurred at mile post 157 of US Highway 26, at mile post 115 of US Highway 395, and along County Road 49. Mount Vernon received at least 0.60 inches of rain within one hour.

The wider storm

Persistent moist southwest flow continued into the 25th of May. Thunderstorms developed late morning and continued well into the evening. The storms produced locally heavy rain and some flooding. Also some hail occurred with the storms. The hail was mainly small, but did reach to 1 inch in diameter.

Began near Joaquin Miller Resor (44.2900, -118.9800).

Source: NOAA Storm Events Database, event 759386. Narratives are written by the National Weather Service forecast office that issued the report.

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