Thunderstorm Wind — Grant, Washington

2013-08-10 · near Quincy, Grant, Washington

Event narrative

High winds uprooted a 40 foot tree onto a car in southeastern sections of Quincy. Power and phone outages were reported across southwestern sections of town. Six inches of standing water was on sections of Highway 28 in town.

Wider weather episode

Moist, southerly flow ahead of an area of low pressure trickling northward along the Oregon Coast created a moist, unstable environment over Central Washington. Shortwaves ejecting from the shortwave trough supplied the necessary lift to initiate numerous strong thunderstorms across the East Slopes of the Cascades and portions of the Western Columbia Basin. These storms developed during the evening and overnight hours of August 9th and persisted well into the morning hours of August 10th. Storms dissipated around midday then afternoon heating and a second shortwave triggered another round of strong storms during the afternoon and evening hours of the 10th. The main threat with these storms was high rain intensity and flash flooding, however one line of storms also delivered damaging winds.

View location on OpenStreetMap → (47.1638, -119.8334)

Source: NOAA Storm Events Database, event_id 471820. Narrative written by the NWS forecast office that issued the report.