Debris Flow in Ferry County, Washington

Debris Flow February 6, 2015 · Ferry County, Washington

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

What the National Weather Service wrote

Heavy rain produced a mudslide on SR-21 at milepost marker 158 which partially blocked the road. A tractor was able to clear the slide and reopen the lane by 8 AM. Rainfall amounts in the area ranged from .40 to .60 up to the time the slide occurred.

The wider storm

A four day interval in which a series of warm weather systems with very well maintained moisture feeds from the subtropics slowly moved through Northeast Washington. These systems brought considerable rainfall to the mountains and valleys and caused much of the mid-slope elevation snow to melt. The resulting runoff caused some streams and rivers to flood in addition to some debris flows, mudslides, and minor street flooding.

Began near Republic (48.6204, -118.7311).

Source: NOAA Storm Events Database, event 551809. Narratives are written by the National Weather Service forecast office that issued the report.

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