A very warm and moist air mass moved northward from north-central Oregon into eastern Washington on May 30th. With an afternoon of convective heating, there were numerous strong to severe thunderstorms developing and moving across the state during the late afternoon hours. With a very unstable and moist atmosphere, these thunderstorms brought very strong winds, with some gusts up to 50 - 70 mph, across much of the central and southeastern portions of the state. There was some small, pea sized hail and lightning. However, these severe cells brought some significant wind damage to homes, public areas, and roadways.

Strong Wind in CHELAN, WASHINGTON
From 30-MAY-20 18:00:00 to 30-MAY-20 18:30:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported damage to roof, windows, and a fence from strong winds.

Thunderstorm Wind in WHITMAN, WASHINGTON
From 30-MAY-20 18:50:00 to 30-MAY-20 18:55:00 (PST-8)
Location: PALOUSE
Magnitude: 43.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorm winds damaged one vehicle, homes, and a local park. A trained spotter reported that the winds downed trees which caused the damage in Palouse, Washington. There were no known injuries.

Thunderstorm Wind in LINCOLN, WASHINGTON
From 30-MAY-20 19:00:00 to 30-MAY-20 19:30:00 (PST-8)
Location: ROCKLYN
Magnitude: 35.00 EG
Property damage: 10.00K
Crop damage: 5.00K
Reported by: Public

The strong thunderstorm winds in Davenport damaged one home and over 40 poplar trees were uprooted. There were no known injuries.

Thunderstorm Wind in SPOKANE, WASHINGTON
From 30-MAY-20 19:00:00 to 30-MAY-20 19:05:00 (PST-8)
Location: (GEG)SPOKANE INTL AR
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A wind gust of 58 mph measured at Geiger International Airport in Spokane, Washington.

Thunderstorm Wind in LINCOLN, WASHINGTON
From 30-MAY-20 18:00:00 to 30-MAY-20 18:15:00 (PST-8)
Location: MOHLER
Magnitude: 35.00 EG
Property damage: 90.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The local fire department responded to approximately 30 power poles down which closed numerous roads and power outages in Mohler, Washington. There was no known damage other than downed power poles. The time of incident is estimated by radar.

Thunderstorm Wind in WHITMAN, WASHINGTON
From 30-MAY-20 18:10:00 to 30-MAY-20 18:15:00 (PST-8)
Location: PULLMAN
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A Mesonet station in Pullman, Washington measured a wind gust of 60 mph.

Thunderstorm Wind in GRANT, WASHINGTON
From 30-MAY-20 17:05:00 to 30-MAY-20 17:10:00 (PST-8)
Location: BEVERLY
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A Mesonet station in Mattawa, Washington measured a wind gust of 68 mph.

Thunderstorm Wind in ADAMS, WASHINGTON
From 30-MAY-20 17:05:00 to 30-MAY-20 17:15:00 (PST-8)
Location: WASHTUCNA
Magnitude: 27.00 MG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

The Washtucna Community reported that a man lost his life during storm clean up. Due to strong winds, numerous trees were uprooted, property damage, and an unoccupied trailer was blown into a power pole.

Thunderstorm Wind in ADAMS, WASHINGTON
From 30-MAY-20 17:15:00 to 30-MAY-20 17:20:00 (PST-8)
Location: WASHTUCNA ARPT
Magnitude: 48.00 EG
Property damage: 36.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported that 12 power poles were blown onto Highway 260 near Gill Road in Prescott, Washington. There were no known injuries.

Thunderstorm Wind in ADAMS, WASHINGTON
From 30-MAY-20 17:20:00 to 30-MAY-20 17:30:00 (PST-8)
Location: RALSTON
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that blowing dust, followed by wind and heavy rainfall, reduced visibility below one mile.