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EF3 tornado in Steele County, Minnesota

Tornado June 17, 2010 · Steele County, Minnesota

EF3
Rating
4.3 mi
Path length
440 yd
Path width
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 440 yards (0.25 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF3 means. On the Enhanced Fujita scale, EF3 is severe damage: whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, consistent with estimated gusts of 136–165 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

This tornado developed just north of the Steele/Freeborn County line, shortly after the dissipation in Freeborn County of the Newry tornado. This new tornado moved northeast, and initially, occasional trees were broken. Damage intensified somewhat when it hit a farm on State Highway 30 just west of Blooming Prairie. The tornado continued moving northeast, decimating crops. Some bean fields were scoured in spots. It intensified significantly to EF-3 2.5 miles northwest of Blooming Prairie, where a house was leveled, trees were snapped, and large portions of bark were removed. A pickup truck was lofted about 50 feet into the basement of the house. Several other houses sustained minor damage. The tornado dissipated just west of Highway 218 and 123rd Street. Video recorded by law enforcement and chasers.

The wider storm

Several strong storms developed in west-central Minnesota during the mid afternoon hours of June 17th.

These storms quickly become severe and produced softball size hail northwest of Alexandria and a tornado near Leaf Valley that became the EF-4 that moved through Wadena, Minnesota.

By the late afternoon, numerous thunderstorms developed across southern Minnesota along the leading edge of extreme instability.

Numerous funnel cloud reports and a few brief tornado touchdowns were noted prior to 5 pm, but once the low level shear (0-1 km) increased significantly from 15 knots, to over 35 knots, strong tornadoes developed along the Iowa border.

These storms along the Iowa border produced a series of long-lived tornadoes near Albert Lea, Minnesota. Very large hail also accompanied some tornadoes along with flash flooding.

Began near Blooming Prairie (43.8588, -93.1273).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 238659. Narratives are written by the National Weather Service forecast office that issued the report.

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