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EF1 tornado in McCone County, Montana

Tornado June 16, 2010 · McCone County, Montana

EF1

Rating

2.6 mi

Path length

16 yd

Path width

$30K

Damage as recorded

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The path drawn at its surveyed width of 16 yards (0.01 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

Landowner reported a tornado that snapped numerous trees and damaged some metal storage sheds across his property. Tornadic winds were estimated from NWS Survey at 100 mph.

The wider storm

A strong system ejecting out of the central Rockies brought heavy rainfall and severe thunderstorms to the area during the evening. This episode produced an EF1 tornado in northern McCone county and a microburst in eastern Roosevelt county that killed one person near Froid, MT.

Began near Ft Peck Lake Handar (47.9946, -106.0854).

Source: NOAA Storm Events Database, event 238652. Narratives are written by the National Weather Service forecast office that issued the report.

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