Thunderstorm Wind in Granite County, Montana

Thunderstorm Wind July 23, 2014 · Granite County, Montana

60 mph

Estimated gust (52 kt)

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

What the National Weather Service wrote

Several 6 inch diameter limbs blown down from a tall and very sturdy tree in the location of the inflow of a supercell thunderstorm.

The wider storm

An unusually strong upper level low that originated from the Gulf of Alaska, moved across northwest Washington on the evening of July 23 into south-central Alberta Canada by the evening of July 24. A mid-level wave tracked north-northeast across eastern Washington State on the afternoon of July 23 helping to initiate several severe thunderstorms. These storms brought wind damage that extended into northwest Montana. A few discrete strong thunderstorms developing over southwest Montana producing large hail near Butte.

Began near Hall (46.4200, -113.2840).

Source: NOAA Storm Events Database, event 530681. Narratives are written by the National Weather Service forecast office that issued the report.

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