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EF1 tornado in Jones County, Iowa

Tornado July 14, 2021 · Jones County, Iowa

EF1
Rating
8.0 mi
Path length
30 yd
Path width
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 30 yards (0.02 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

An EF-1 tornado developed southeast of Monticello and tracked across rural areas east of Monticello along an intermittent 8 mile path through farmland and wooded areas.

The wider storm

Severe thunderstorms developed ahead of an approaching cold front during the afternoon and evening of Wednesday, July 14. Some of the storms produced damaging winds and numerous tornadoes. Brief torrential rainfall was also observed with the stronger storm cells. The areas that were hit hardest were in Buchanan, Delaware, Benton, Linn, and Jones counties in IA, where a total of 14 tornadoes occurred. 7 of the tornadoes had no visible damage.

Began near Monticello Muni Arpt (42.2100, -91.1400).

Other tornadoes from the same storm system

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

EF1 Jones CountyEF1 Jones CountyEF1 Delaware CountyEF1 Benton CountyEF0 Buchanan CountyEFU Benton CountyEFU Buchanan CountyEFU Benton CountyEFU Benton CountyEFU Linn CountyEFU Linn CountyEFU Delaware County

Source: NOAA Storm Events Database, event 964198. Narratives are written by the National Weather Service forecast office that issued the report.

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