Aug 14, 2014
A closed upper-level low over the Washington Cascades delivered a low shear but unstable environment. Sufficient atmospheric moisture, characterized by precipitable water values near one inch, was already in place. A combination of afternoon heating and lift along spokes of energy pivoting around the main low sparked numerous rounds of wet thunderstorms between the early morning hours of August 13th through morning of the 15th. The heaviest storms were delivering around one inch of precipitat
Source: NOAA National Weather Service Storm Events Database (event 535177). 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.