Thunderstorm Wind — Umatilla, Oregon

2023-05-20 · near Mission, Umatilla, Oregon

Event narrative

Mesonet station OD191, 2 miles WSW of Mission, reported a wind gust of 62 mph from the outflow boundary of a deteriorating thunderstorm at 2220 PDT.

Wider weather episode

Southwesterly flow aided by an approaching upper level trough facilitated another round of strong diurnal convection during the afternoon hours, starting the central Oregon and along the eastern Mountains before expanding northeastward. Strong to severe T-storms focused in Central Oregon produced up to 1.5 inch hail, strong wind gusts, and heavy downpours that resulted in areas of flash flooding.

View location on OpenStreetMap → (45.6600, -118.7200)

Source: NOAA Storm Events Database, event_id 1104749. Narrative written by the NWS forecast office that issued the report.