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EF1 tornado in Hanson County, South Dakota

Tornado May 5, 2007 · Hanson County, South Dakota

EF1

Rating

1.9 mi

Whole path

100 yd

Path width

$10K

Damage as recorded

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

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 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

A tornado damaged a farmstead, blowing the roof off a gust house. The tornado also caused tree damage. The tornado crossed into eastern Davison County before dissipating.

The wider storm

Numerous thunderstorms during the afternoon and evening of May 5th produced large hail, damaging winds, several tornadoes, and flash flooding in southeast South Dakota. Significant damage was reported from several locations.

Began near Riverside (43.7118, -97.9387).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 34975. Narratives are written by the National Weather Service forecast office that issued the report.

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