Thunderstorm Wind in Lewis County, Idaho
Thunderstorm Wind August 29, 2017 · Lewis County, Idaho
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
A series of photographs from the Lewis County Emergency Manager indicated numerous trees down in Kamiah, with damage to outbuildings, a barn and at least one car in and around the town.
The wider storm
Hot and unstable conditions with mid level monsoonal moisture created conditions ripe for gusty thunderstorms over north central Idaho during the afternoons of August 29th and 30th.
During the afternoon of August 29th thunderstorms developed over extreme northeast Oregon and tracked into Nez Perce and Lewis Counties in Idaho. These storms produced wind gusts which downed trees and damaged structures in the Kamiah area. A nearby remote weather station recorded a peak wind gust of 94 mph as these storms passed through.
The next day on August 30th another round of afternoon high based thunderstorms produced a microburst which created extensive damage to power lines along a stretch of Highway 64 on the Camas Prairie.
Began near Kamiah (46.2255, -116.0276).
Source: NOAA Storm Events Database, event 720136. Narratives are written by the National Weather Service forecast office that issued the report.
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