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EF1 tornado in Grant County, Wisconsin

Tornado June 17, 2026 · Grant County, Wisconsin

EF1

Rating

20.8 mi

Whole path

150 yd

Path width

$536K

Damage as recorded

NOAA records this tornado county by county. Its path ran through Grant County → Iowa 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

This tornado developed southeast of Boscobel with generally a weak damage path throughout its duration. The tornado was primarily responsible for tree and farm outbuilding damage along its path with some pockets of more significant damage to trees and outbuildings resulting the EF-1 rating. Eventually the tornado progressed eastward into Iowa County resulting in additional tree and outbuilding damage.

The wider storm

During the late afternoon and early evening hours on June 17th, two long-tracked tornadoes moved across portions of Crawford and Grant Counties. The first of these tornadoes was an EF-2 which moved into Crawford County from northeast Iowa and resulted in several instances of tree and structural damage before dissipating near Boscobel. The second tornado, which was rated EF-1, formed just southeast of Boscobel and moved east-southeast through Grant County resulting in various instances of tree and structural damage before exiting into Iowa County.

Began near Boscobel (43.1144, -90.6560).

Other tornadoes from the same storm system

1 more tornado the National Weather Service filed under this storm episode.

EF2 Crawford County

Source: NOAA Storm Events Database, event 1355058. Narratives are written by the National Weather Service forecast office that issued the report.

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