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EF1 tornado in Clark County, Indiana

Tornado March 1, 2017 · Clark County, Indiana

EF1
Rating
0.3 mi
Path length
20 yd
Path width
$200K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 20 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

A small tornado touched down in the backyard of a home about a quarter mile west from the caution light on Indiana Highway 60 and uprooted trees and caused roof damage to the home. The tornado moved along Muddy Fork and snapped or uprooted numerous trees. Then the tornado crossed Indiana Highway 60 where it was witnessed by people in the Buckboard Diner. Next, the tornado removed the roof of the older building next to the cafe and a garage behind the cafe. It threw its debris into a small church and removed some of its roof. No other damage in the narrow path was seen beyond this point.

The wider storm

The combination of a moist and unseasonably warm air mass and an approaching low pressure system and cold front brought multiple rounds of severe weather to southern Indiana during the early morning hours on March 1. In the end, there were 5 tornadoes across southern Indiana, the strongest being an EF-2 that tracked through portions of Dubois County. In addition to the tornadoes, there were several areas of intense straight-line winds estimated up to 100 mph in places. The impacts included numerous areas of structural damage and downed trees. The widespread heavy rain brought the Muscatatuck River at Deputy into minor flood.

Began near Borden (38.4680, -85.9520).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 675728. Narratives are written by the National Weather Service forecast office that issued the report.

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