Thunderstorm Wind — Lewis, Idaho

2013-09-15 · near Nezperce, Lewis, Idaho

Event narrative

Tree fell onto some power lines and knocked out power to 115 customers.

Wider weather episode

A negatively tilted shortwave trough of lower pressure interacted with some surface based instability of near 1,000 J/KG in northern Oregon to spawn squall line that traversed northward across eastern Washington and into the northern Idaho Panhandle. Strong winds mixed down to the surface along the squall line to created widespread damaging wind gusts. Also considered a Haboob, the strongest winds occurred ahead of the parent line of thunderstorms. Little rain occurred with the thunderstorms, which is indicative of much of the precipitation evaporating before reaching the surface. This evaporative cooling likely aided in the wind potential from the thunderstorms. Most of the wind damage occurred near and south of Priest Lake.

View location on OpenStreetMap → (46.2300, -116.2300)

Source: NOAA Storm Events Database, event_id 474809. Narrative written by the NWS forecast office that issued the report.