Thunderstorm Wind, Malheur
- When
- May 15, 10:00 AM PST to 12:00 PM PST
- Where
- Malheur County
- Measured
- 60 kt (69 mph)
- Property damage
- $500,000
- Coordinates
- 43.193, -117.623 (the zone’s center; the record gives no point)
Severe thunderstorms formed in extreme Eastern Oregon near midday. High winds knocked over trees, power poles, power lines, and billboards, and caused areas of blowing dust that contributed to several auto accidents. A weather spotter at Keating, northeast of Baker City in Baker County, reported winds gusting to near 50 knots between 1000 PST and 1130 PST, with trees and large tree branches blown down. The Ontario Airport, in Malheur County, reported steady winds in the 40 to 50 knot range from 1000 PST until 1200 PST, with gusts to 60 knots. Areas of blowing dust reduced visibility to 15 feet near Ontario, contributing to several auto accidents, including a seven car pileup on United States Highway 20 at 1145 PST. No one was seriously injured. Tumbleweeds and other debris were blown into irrigation ditches and dams in the nearby Treasure Valley agricultural area, plugging them up and backing up water. It was several days before all of the weeds and debris were removed and the irrigation systems were fully operational.