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EF0 tornado in Johnson County, Iowa

Tornado May 25, 2008 · Johnson County, Iowa

EF0
Rating
0.1 mi
Path length
100 yd
Path width
$10K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 100 yards (0.06 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 brief tornado spun up where two intersecting boundaries enhanced a strengthening updraft. A house incurred minor damage to the gutters and siding, and lost some shingles off the roof. The garage door was also blown in. Several trees were uprooted and a few were snapped off.

The wider storm

Heavy rain-producing showers and thunderstorms moved across much of eastern Iowa and northwest and west central Illinois from the evening of May 25th to the early morning of May 26th. Some of the stronger storms also produced tornadoes, damaging winds, and large hail. Buchanan, Delaware, and Dubuque counties in Iowa were hardest hit with the heavy rains, where rainfall totals of 3 to 8 inches fell resulting in flash flooding.

Began near North Liberty (41.7889, -91.6101).

Other tornadoes from the same storm system

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

EF3 Buchanan CountyEF1 Buchanan CountyEF1 Delaware CountyEF1 Iowa County

Source: NOAA Storm Events Database, event 106105. Narratives are written by the National Weather Service forecast office that issued the report.

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