Flash Flood in Walla Walla County, Washington

Flash Flood July 16, 2012 · Walla Walla County, Washington

$1.2M

Damage as recorded

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

What the National Weather Service wrote

Thunderstorms training from south southwest to north northeast over the narrow path produced an estimated 1 to 2 inches of rainfall and caused flash flooding and mud slides. A parked pickup truck was completely submerged. Over a dozen county roads were damaged.

The wider storm

A nearly stationary upper level low pressure area parked near Brookings, Oregon brought abundant moisture across eastern Washington. This combined with daytime heating to produce a few severe thunderstorms and locally heavy rainfall. The heavy rainfall caused flash flooding and landslides in several areas. The upper level low moved north away from the area late on July 20.

Began near Touchet (46.0037, -118.6710).

Source: NOAA Storm Events Database, event 405392. Narratives are written by the National Weather Service forecast office that issued the report.

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