EF0 Tornado — Washington, Oregon

2018-10-29 · near Forest Grove, Washington, Oregon

Event narrative

Multiple greenhouse structures were damaged at a farm on Thatcher Road. Witness accounts also confirmed a tornado. The tornado was likely on the ground for about 30 seconds to 1 minute.

Wider weather episode

A cold front which moved through on October 27th brought a much cooler air mass in aloft, which destabilized the atmosphere enough for thunderstorm development across the area on the 28th and 29th. There was enough vertical shear in the environment for a few of theses vigorous showers and thunderstorms to start to rotate, three of which went on to produce tornadoes.

View location on OpenStreetMap → (45.5586, -123.1386)

Source: NOAA Storm Events Database, event_id 789511. Narrative written by the NWS forecast office that issued the report.