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EF1 tornado in Lake County, Indiana

Tornado March 31, 2023 · Lake County, Indiana

EF1
Rating
3.2 mi
Path length
325 yd
Path width
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 325 yards (0.18 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 tornado touched down north of U.S. Route 30 near Grant St. in Merrillville and then tracked eastward for roughly 3.3 miles before lifting over the far south side of Hobart along E 73rd Ave just east of Colorado St. The tornado blew out windows and tore sections of roofs off of multiple homes where its winds were able to compromise the residences' garage doors. The tornado also caused damage to power lines and several trees along its path.

The wider storm

During the afternoon and evening of the 31st, a wave of severe thunderstorms produced numerous tornadoes, severe hail, and extensive wind damage across northwestern Indiana. A total of 23 tornadoes were confirmed across the state. The NWS Chicago office tied a record for the most tornadoes to occur in a single calendar day within the office's county warning area with 22, 5 of which occurred in Indiana. Two EF-2 tornadoes occurred in Benton County and one other in Lee County, Illinois. Some of the more notable damage includes a few homes with walls and portions of roofing blown away, a wind turbine that had been snapped in half, and wind turbine blades thrown as far as 600 yards, all a result of the two EF-2 tornadoes in Benton County.

Began near Merrillville (41.4779, -87.3562).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 1086116. Narratives are written by the National Weather Service forecast office that issued the report.

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