May 9, 2018
Warm temperatures in early May prompted accelerated snow melt in the mountains of British Columbia. Run off from this snow melt caused multiple areal flooding issues in Okanogan County during the second and third week of May. Lake Osoyoos began rising rapidly during the second week of May. Flooding occurred on properties along the lake shore during the second and third weeks of May as the water level peaked and stabilized. The water level began to recede on May 19th and continued to fall through
Source: NOAA National Weather Service Storm Events Database (event 758807). 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.