Thunderstorm Wind in Lemhi County, Idaho

Thunderstorm Wind June 26, 2017 · Lemhi County, Idaho

68 mph

Measured gust (59 kt)

$10K

Damage as recorded

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Road crews, the public, and the county emergency manager all had reports of damage from the strong winds during the late evening. Power companies reported outages to approximately 600 customers due to trees on power lines. A storm spotter in the area reported losing a few shingles, while another resident lost a stove pipe off the roof on the west side of Salmon, ID. Road crews reported downed Cottonwood trees on US-93.

The wider storm

A strong shortwave in westerly flow enhanced thunderstorms over the Northern Rockies. Intense heating lead to near-record surface temperatures, which provided modest instability and a dry near-surface layer for downdrafts to accelerate within. Gusty winds were widely observed with storm outflows, with a few severe gusts recorded. Many strong gusts happened around or after sunset.

Began near Carmen (45.2025, -113.8966).

Source: NOAA Storm Events Database, event 700655. Narratives are written by the National Weather Service forecast office that issued the report.

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