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EF1 tornado in Lawrence County, Indiana

Tornado March 1, 2017 · Lawrence County, Indiana

EF1
Rating
0.2 mi
Path length
40 yd
Path width
$22K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 40 yards (0.02 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

This EF-1 tornado, with winds up to 110 mph, uprooted trees at the start of the path. Uphill, a barn's roof was lofted nearly 100 yards to the northeast. The associated house had the majority of the roof lofted and thrown over 100 yards to the northeast. The east wall of the house and garage displayed widespread mud and insulation splatter. Insulation also splattered inside the mailbox from an east wind component. A lamp post was broken, laying westward.

The wider storm

A low pressure system brought very warm and unstable air for late February and early March to central Indiana. The result was severe thunderstorms and 7 tornadoes from the 28th of February to March 1st. A surface frontal system interacted with an unstable and high shear environment to produce the severe weather.

Began near Mitchell (38.7281, -86.5129).

Other tornadoes from the same storm system

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

EF2 Daviess CountyEF2 Daviess CountyEF2 Lawrence CountyEF2 Jackson CountyEF1 Daviess County

Source: NOAA Storm Events Database, event 687139. Narratives are written by the National Weather Service forecast office that issued the report.

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