Flash Flood in Columbia County, Washington

Flash Flood June 2, 2022 · Columbia County, Washington

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

What the National Weather Service wrote

A trained spotter 6 miles east of Dayton, WA reported that 2.5 inches of rainfall had fallen in less than an hour. This then led to runoff depositing mud and rock from an adjacent farm field, approximately 1 foot deep in some places, across Patit road. The flowing watr and mud also displaced a tractor in the field. Crops were also reported damaged from the heavy rain.

The wider storm

A strong upper level low pressure system off the coast of British Columbia placed the region under a moist southwest flow aloft. At the lower levels, this flow, already saturated soils, and increasing instability in the afternoon allowed developing storms to produce high rainfall rates. Areas of Columbia county, WA saw these high rain rates, resulting in flash flooding.

Began near Whetstone (46.3300, -117.8600).

Source: NOAA Storm Events Database, event 1042946. Narratives are written by the National Weather Service forecast office that issued the report.

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