Jun 2, 2022
A strong upper level low pressure system off the coast of British Columbia placed the region under a moist southwest flow aloft. At the lower levels, this flow, already saturated soils, and increasing instability in the afternoon allowed developing storms to produce high rainfall rates. Areas of Columbia county, WA saw these high rain rates, resulting in flash flooding.
Source: NOAA National Weather Service Storm Events Database (event 1042946). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Columbia County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.