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EF1 tornado in Brown County, Wisconsin

Tornado August 6, 2013 · Brown County, Wisconsin

EF1

Rating

64.2 mi

Whole path

150 yd

Path width

$15.7M

Damage as recorded

NOAA records this tornado county by county. Its path ran through Outagamie County → Outagamie County → Outagamie County → Brown County → Brown County → Brown County → Calumet County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 150 yards (0.09 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

The tornado that touched down in Outagamie County, 3.5 miles east of Greenville at 12:38 am CDT, briefly moved across far southwest Brown County near Holland. A few trees were knocked over by the tornado in Brown County (DI 28, DOD 3). The average path width was 150 yards. The tornado then moved into Calumet County at 12:50 am CDT.

The wider storm

A line of severe thunderstorms, known as a quasi-linear convective system (QLCS), produced six tornadoes and widespread damaging winds across east-central Wisconsin during the late night hours of August 6-7. The storms formed ahead of a cold front that also produced severe weather in Minnesota and western Wisconsin.

The tornadoes occurred within about 50 minutes--between 12:22 am and 1:10 am CDT. Hundreds of homes, businesses and farm buildings were damaged. Two injuries occurred at a campground in Waupaca County. Thousands of trees and power lines were also downed, leaving tens of thousands of people without power. The strongest tornado of the event reached EF2 intensity (winds estimated at 115 to 120 mph). This tornado caused significant damage to a church in New London.

The six tornadoes that occurred on August 7 were the most nighttime tornadoes in a single event in northeast Wisconsin since accurate tornado records began (1950).

Began near Holland (44.2470, -88.1920).

Other tornadoes from the same storm system

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

EF2 Waupaca County EF1 Brown County EF1 Kewaunee County EF1 Manitowoc County

Source: NOAA Storm Events Database, event 462236. Narratives are written by the National Weather Service forecast office that issued the report.

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