Heavy Rain in Washington County, Oregon

Heavy rain from convective showers resulted in significant flooding near Beaverton. Flooding was reported of four homes, four apartments, several garages, the Winterhawks Skating Center, and a community pool. The city Public Works Director reported 2.3 inches of rain per hour, a personal weather station reported 2.29 inches of rain over 2 hours, and the National Weather Service Doppler radar estimated 1.7 inches per hour. A car stalled in a flooded high water in an underpass near the US 26-US 217 interchange. The cost damage is an estimate based on reports from the General Manager of the Skating Center and previous history of similar residential damage.

A shortwave trough combined with favorable upper level dynamics, mid-level instability and plenty of sub tropical moisture resulted in convective showers over the Portland metro area. Heavy rain from these showers resulted in significant flooding for the Beaverton/Hillsdale. Four homes, four apartments, the Winterhawks Skating Center, and a community center pool suffered damage from the heavy rain.