EF0 tornado in Brown County, South Dakota

Tornado May 22, 2010 · Brown County, South Dakota

EF0

Rating

18.6 mi

Whole path

50 yd

Path width

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

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 50 yards (0.03 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 tornado entered into western Brown county from southeast Mcpherson county. The tornado was an EF2 before entering Brown county. The tornado slowly dissipated shortly after entering the county with some tree damage observed.

The wider storm

Several supercell thunderstorms developed along a very strong warm front and produced nine tornadoes from Akaska to Bowdle to Hecla. The largest of the tornadoes was an EF4 tornado which occurred near Bowdle. This tornado produced devastating damage in the Bowdle area. The other tornadoes ranged from EF0 to EF2 and caused extensive tree and building damage. Nearly one-hundred power poles were downed along with several high line towers leaving nearly a thousand customers without power. Also, very strong straight line winds and large hail up to the size of golfballs affected parts of the area causing some damage.

Began near Barnard (45.6900, -98.7300).

Other tornadoes from the same storm system

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

EF4 Walworth County EF2 Brown County EF1 Walworth County EF1 Hyde County EF0 Walworth County EF0 Edmunds County EF0 Edmunds County EF0 Edmunds County

Source: NOAA Storm Events Database, event 236007. Narratives are written by the National Weather Service forecast office that issued the report.

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