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EF1 tornado in Renville County, Minnesota

Tornado July 1, 2011 · Renville County, Minnesota

EF1
Rating
2.4 mi
Path length
300 yd
Path width
$250K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 300 yards (0.17 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

An EF-1 tornado touched down north-northwest of Danube, and moved north-northeast. It dissipated approximately 3.7 miles north of Danube and caused damage to a house and a large equipment shed along its path.

The wider storm

A very hot and humid day occurred across southern Minnesota, and western Wisconsin Friday, July 1st. A frontal boundary held across the southwest part of the state, then northeast across east central Minnesota, and into portions of west central and northern Wisconsin.

During the afternoon, a large thunderstorm complex developed across southeast South Dakota, along this frontal boundary and moved into far southwest Minnesota. Several long duration supercells and bow echoes occurred along a path from the southwest, to the northeast across southern Minnesota, and into west central Wisconsin.

Several of the storms developed tornadoes near Redwood Falls, and again around St. Cloud, Minnesota. In addition to the tornadoes, severe straight line winds occurred. Plus, the development of the rear inflow notch, allowed for the strong winds to continue beyond the main bow echo across many areas of southern Minnesota.

Widespread damage occurred with this system along with hundreds of large trees blown down and structural damage to homes and barns. Widespread reports of hail with each storm, along with a few reports of baseball and softball size hail.

Several communities lost power with over 90,000 reported outages throughout southern and central Minnesota.

Began near Danube (44.7979, -95.1020).

Other tornadoes from the same storm system

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

EF1 Redwood CountyEF1 Redwood CountyEF0 Stearns County

Source: NOAA Storm Events Database, event 317405. Narratives are written by the National Weather Service forecast office that issued the report.

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