EF3 tornado, Bradleytown to Empire, Alabama, April 24, 2010

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 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 mphthis tornado

   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

EF3

Date

April 24, 2010

Touchdown

10:01 PM CDT (03:01 UTC)

Lifted

10:55 PM CDT (03:55 UTC)

On the ground

54 minutes

Path length

29.6 miles (47.7 km)

Path width

400 yards (366 m)

Deaths

0

Injuries

0

Property damage

$658,000

Counties

Walker, Jefferson and Blount counties

Touchdown point

33.734, -87.286

Lift-off point

33.853, -86.793

Record number

1004242101-01

A deepening storm system and associated cold front brought widespread severe thunderstorms, including at least 8 tornadoes, to central Alabama.

This long tracked, strong, tornado first touched down in the Walker County city of Parrish. It then remained on the ground for 54 minutes, traversing nearly 30 miles in three counties. The vast majority of the damage was done in Walker County. In addition to Parrish, heavy damaged occurred in the cities of Cordova, Sumiton, and Empire. Between 70 and 80 homes and other buildings along the path received varying degrees of damage, and at least one home in Parrish was completely destroyed. Somewhere between 800 and 1000 trees were snapped, with a similar number uprooted. While there were no known deaths or injuries directly caused by the tornado, one 50 year old woman died (indirect) after she slipped and fell while going to a storm shelter. The tornado moved into Jefferson County near the intersection of Bankston Road and County Line Road.

The deaths

0 direct deaths are recorded for this tornado, each with what Storm Data knows of it.

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

0 minutes of warning. NWS BMX issued a tornado warning for this county at 03:01 UTC, 0 minutes before the tornado touched down, in force until 03:30 UTC.

The county was under a tornado watch, issued at 00:15 UTC and running to 05:20 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 01:01 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 Birmingham radar (KBMX), 74 km away, was scanning. The volume nearest the touchdown began at 03:00 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 2010 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are

38 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.