EF0 tornado in Alger County, Michigan

Tornado June 30, 2026 · Alger County, Michigan

EF0

Rating

0.6 mi

Whole path

25 yd

Path width

NOAA records this tornado county by county. Its path ran through Delta County → Alger County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 25 yards (0.01 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF0 means. On the Enhanced Fujita scale, EF0 is light damage: shingles and siding peeled, gutters torn, branches broken, consistent with estimated gusts of 65–85 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 thunderstorm initiating in southern Marquette County continued to develop into a supercell thunderstorm as it moved east into Delta and Alger County. As the thunderstorm began splitting, the southern segment intensified and produced a weak, EF-0 tornado south of Trenary, MI in Delta County. The tornado crossed Alger Delta 43rd road and proceeded northeast before dissipating.

The wider storm

As a significant ridge was over the southeastern US, hot and unstable air was over Michigan's Upper Peninsula by the 30th. This warm and moist air caused unseasonable heat impacts, and forcing from an approaching upper level disturbance over the Canadian Prairie initiated thunderstorms that caused multiple forms of severe weather, including the first confirmed tornado for the Upper Peninsula since 2020.

Began near Winters (46.1589, -86.9588).

Source: NOAA Storm Events Database, event 1345527. Narratives are written by the National Weather Service forecast office that issued the report.

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