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EF1 tornado in O'brien County, Iowa

Tornado June 25, 2010 · O'brien County, Iowa

EF1

Rating

3.3 mi

Path length

100 yd

Path width

$20K

Damage as recorded

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 100 yards (0.06 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

A tornado damaged the roof of a home and tore the chimney off, and destroyed a machine shed on the same property. The tornado also blew down several trees and blew a trampoline into a tree. The tornado also caused an unknown amount of crop damage.

The wider storm

Thunderstorms produced tornadoes, one that caused considerable damage and at least two injuries along a 14 mile path, along with damaging winds, in northwest Iowa during the evening of June 25th.

Began near Germantown (42.9700, -95.7800).

Other tornadoes from the same storm system

5 more tornadoes the National Weather Service filed under this storm episode.

EF4 Lyon County EF1 Lyon County EF0 Osceola County EF0 Sioux County EF0 O'brien County

Source: NOAA Storm Events Database, event 246158. Narratives are written by the National Weather Service forecast office that issued the report.

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