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EF1 tornado in Hamilton County, Tennessee

Tornado April 27, 2011 · Hamilton County, Tennessee

EF1
Rating
17.0 mi
Whole path
120 yd
Path width
1
Death
$125K
Damage as recorded

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

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 120 yards (0.07 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

Ooltewah-to-Cleveland Tornado. A NWS storm survey reported an EF1 tornado touched down about 2 miles south of Ooltewah and tracked NNE through Ooltewah to near on I-75 at about mile marker 12. The path then turned more NE (at 35.101N/85.020W) to the Bradley County line. The 90 mph wind produced minor to moderate roof damage on a few homes and downed numerous trees.

The wider storm

Favorable atmospheric conditions resulted in a deadly tornado outbreak across east Tennessee on the 27th. The thunderstorms produced more than 50 tornadoes across the east Tennessee area with 32 deaths and more than 200 injured. The tornadoes produced from light to heavy damage to hundreds of homes and businesses. Hail as large as baseballs was also reported.

Began near Collegedale (35.0400, -85.0700).

Other tornadoes from the same storm system

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

EF4 Hamilton County 20 deadEF4 Bledsoe County 4 deadEF4 Blount CountyEF4 Rhea CountyEF3 Greene County 6 deadEF3 Greene County 2 deadEF2 Bradley County 4 deadEF2 Johnson County 2 deadEF2 Hamilton CountyEF2 Monroe CountyEF2 Sequatchie CountyEF2 Marion CountyEF2 Monroe CountyEF2 Washington CountyEF2 Bradley CountyEF1 Hamilton CountyEF1 Cocke CountyEF1 Cocke CountyEF1 Hamilton CountyEF1 Hamilton CountyEF1 Hamilton CountyEF1 Knox CountyEF1 Marion CountyEF1 McMinn CountyEF1 Monroe CountyEF1 Monroe CountyEF1 Monroe CountyEF1 Rhea CountyEF1 Sequatchie CountyEF0 Bradley Countyand 20 more

Source: NOAA Storm Events Database, event 300746. Narratives are written by the National Weather Service forecast office that issued the report.

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