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EF1 tornado in Lee County, Iowa

Tornado March 10, 2026 · Lee County, Iowa

EF1

Rating

1.2 mi

Path length

50 yd

Path width

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The path drawn at its surveyed width of 50 yards (0.03 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 survey was completed with the help of the Denmark Fire Department. This EF-1 tornado caused damage to a large section of shingles that it tore off a roof and the soffit blew in on multiple sides of a house. About 10-15 snapped trees, with most snapped halfway up. There were also 5-8 trees that were uprooted. In addition, a power pole was snapped. Damage largely confined to along and just west of 330th Avenue. This EF-1 tornado had peak estimated winds of 100 MPH along its 1.16 mile path with a peak width of 50 yards.

The wider storm

Numerous severe thunderstorms developed during the afternoon on Tuesday producing hail that ranged in size from penny (0.88) to baseball (2.75) in diameter. There was a total of 10 reports with hail over 2.00 inches in diameter. During the early evening hours, one storm produced three different EF-1 tornadoes in Lee County near Donnellson.

Began near Denmark (40.7100, -91.2900).

Other tornadoes from the same storm system

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

EF1 Lee County EF1 Lee County

Source: NOAA Storm Events Database, event 1322021. Narratives are written by the National Weather Service forecast office that issued the report.

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