EF0 tornado, Boonshill, Tennessee, March 2, 2012

1. EF065 to 85 mphthis tornado

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

2. EF186 to 110 mph

   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

EF0

Date

March 2, 2012

Touchdown

2:45 PM CST (20:45 UTC)

Lifted

2:47 PM CST (20:47 UTC)

On the ground

2 minutes

Path length

0.6 miles (1.0 km)

Path width

50 yards (46 m)

Deaths

0

Injuries

0

County

Lincoln County

Touchdown point

35.212, -86.742

Lift-off point

35.212, -86.731

Record number

1203021445-01

Southern middle Tennessee experienced a portion of a much larger outbreak of tornadoes and severe weather from the Ohio Valley south through the Tennessee Valley to the Gulf Coast in advance of a strong cold front. The storms came in two waves, one during the mid to late morning, and another throughout the afternoon hours. One of the morning supercell storms produced a tornado that made a very short track (1/4 mile) into far southwest Franklin County. This storm was one of a pair of tornadic supercells which tracked through Limestone and Madison Counties in north central Alabama.||During the early afternoon, numerous thunderstorms re-erupted across north Alabama which moved into southern Tennessee, including several supercells. Most of these storms were large hail producers, including up to baseball sized in Franklin County during the mid afternoon. One supercell produced an isolated tornado in the Boonshill community in Lincoln County. The cold front moved through during the mid to late evening, ending the threat of severe weather.

A tornado of EF-0 intensity with peak wind speeds of 65 mph began a short path in Boonshill. The tornado produced shingle damage at the Boonshill Community Center, uprooted eight medium to large trees and destroyed an hold barn along Delina Boonshill Road.

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

17 minutes of warning. NWS HUN issued a tornado warning for this county at 20:28 UTC, 17 minutes before the tornado touched down, in force until 21:00 UTC.

The county was under a tornado watch, issued at 19:20 UTC and running to 02:57 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 0.15 chance of a tornado within 25 miles, in the hatched area where significant tornadoes were expected. The outlook in force was issued at 19:56 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.

The Northeast Alabama radar (KHTX), 67 km away, was scanning. The volume nearest the touchdown began at 20:43 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

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 2012 tornado in TennesseeEvery tornado in Tennessee since 1950Warnings in force in Tennessee nowThe forecast where you are

69 more were confirmed in the United States that day.

All 70 of them

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.