Flash Flood in Pend Oreille County, Washington

Flash Flood September 27, 2011 · Pend Oreille County, Washington

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

What the National Weather Service wrote

Heavy rain fell at rate of approximately one and one quarter of an inch per hour resulted in fast flowing water down a sloped front yard of a residence. Loose soil was easily carried by the runoff, which created a flow of mud that covered the driveway of the residence. No damage was reported.

The wider storm

Post frontal showers developed in the wake of a cold front late in the afternoon across southern Pend Oreille County. A shallow layer of instability off the surface and ample low level moisture resulted in quick developing convective cells that produced heavy rainfall and pea sized hail.

Began near Diamond Lake (48.1703, -117.3007).

Source: NOAA Storm Events Database, event 341490. Narratives are written by the National Weather Service forecast office that issued the report.

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