EF1 tornado, Tennessee City to Pond, Tennessee, April 4, 2011

1. EF065 to 85 mph

   Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

2. EF186 to 110 mphthis tornado

   Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

3. EF2111 to 135 mph

   Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

4. EF3136 to 165 mph

   Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

5. EF4166 to 200 mph

   Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

6. EF5over 200 mph

   Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

7. Unrated

   The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

Rating

EF1

Date

April 4, 2011

Touchdown

1:33 PM CDT (18:33 UTC)

Lifted

1:41 PM CDT (18:41 UTC)

On the ground

8 minutes

Path length

7.3 miles (11.7 km)

Path width

150 yards (137 m)

Deaths

0

Injuries

0

Property damage

$110,000

Crop damage

$12,000

County

Dickson County

Touchdown point

36.095, -87.539

Lift-off point

36.084, -87.410

Record number

1104041233-01

From the morning through mid afternoon hours on Monday, April 4th, a line of showers and thunderstorms moved across Middle Tennessee ahead of the passage of a strong surface and upper level frontal system. As a result, a widespread convective wind event occurred across the area, resulting in numerous reports of thunderstorm wind damage. Also, severe thunderstorms produced several funnel clouds and a few tornadoes.

Initial damage was noted along U.S. Highway 70 approximately 1 mile west of |Tennessee City in western Dickson County. Damage was nearly continuous along a 7.3 mile track into the west side of the city of Dickson. The last evidence of damage was just west of Dickson Lake. The maximum path width of the tornado was nearly 150 yards.||Hundreds of hardwood trees were snapped and uprooted along the damage path. Several structures experienced significant roof damage including a fire hall in Tennessee City. Several outbuildings and barns were also heavily damaged.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down. One was issued for the county at another hour that day.

The county was under a tornado watch, issued at 16:34 UTC and running to 20:11 UTC.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The Storm Prediction Center had this point in a Moderate Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 16:29 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Local storm reports within 60 km of the path, in the three hours either side.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

The live radar over the trackEvery 2011 tornado in TennesseeEvery tornado in Tennessee since 1950Warnings in force in Tennessee nowThe forecast where you are

42 more were confirmed in the United States that day.

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.