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EF1 tornado in Jefferson County, Missouri

Tornado December 31, 2010 · Jefferson County, Missouri

EF1
Rating
8.6 mi
Whole path
50 yd
Path width

NOAA records this tornado county by county. Its path ran through Franklin County → Jefferson 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 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

The tornado skipped northeast and moved into northwest Jefferson County. Additional medium to large tree limbs were snapped while some medium size trees were uprooted along the Dittmer-Catawissa Road or 3 miles northwest of Dittmer. As the tornado continued to skip northeast, several large trees including large pine trees were snapped at the base or uprooted on Highway NN or 3 miles north of Dittmer. The tree damage was on a ridge crest along Highway NN. The damage was rated EF1 at this location. The damage width was approximately 50 yards. The tornado moved northeast and caused minor tree damage on Dutch Creek Road 1.5 miles southwest of Byrnesville. The tornado then lifted and dissipated.

The wider storm

Severe thunderstorms developed ahead of a strong cold front, triggering numerous showers and thunderstorms. A number of tornadoes were reported as well as damaging winds and large hail.

Began near Oermann (38.3282, -90.7571).

Other tornadoes from the same storm system

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

EF3 St. Louis County 1 deadEF2 Franklin CountyEF1 St. Louis CountyEF1 St. Louis (c) CountyEF1 Franklin CountyEF1 Crawford CountyEF0 St. Charles County

Source: NOAA Storm Events Database, event 275088. Narratives are written by the National Weather Service forecast office that issued the report.

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