Aug 10, 2013
Moist, southerly flow ahead of an area of low pressure trickling northward along the Oregon Coast created a moist, unstable environment over Central Washington. Shortwaves ejecting from the shortwave trough supplied the necessary lift to initiate numerous strong thunderstorms across the East Slopes of the Cascades and portions of the Western Columbia Basin. These storms developed during the evening and overnight hours of August 9th and persisted well into the morning hours of August 10th. Sto
Source: NOAA National Weather Service Storm Events Database (event 459712). 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.