Sep 8, 2019
From September 8th through September 11th a slow moving upper level low pressure with a shield of wrap around Pacific moisture passed through eastern Washington and north Idaho. Areas of moderate to locally heavy rain showers and a few thunderstorms ranged through out the region during this cool and unstable wet period. Locally heavy rain caused a few Flash Floods and numerous Debris Flows in the Cascades east slopes region and some local flooding near Pullman.
Source: NOAA National Weather Service Storm Events Database (event 855385). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Chelan County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.