Jul 12, 2001
Three to five inches of rain caused a significant 100+ year flash flood over the higher terrain of northeast Okanogan County on the evening of July 12. The weather pattern showed an upper level high pressure ridge over the western United States with monsoonal moisture extending northward into Washington. Early in the evening, a band of northward-moving thunderstorms developed over northeast Okanogan County which continued to re-generate on its southern flank for 2-3 hours. Excessive rainfall
Source: NOAA National Weather Service Storm Events Database (event 5259482). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Okanogan County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.