EF2 tornado, Horton to Albertville Muni Arp, Alabama, March 19, 2018

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 mphthis tornado

   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

EF2

Date

March 19, 2018

Touchdown

7:26 PM CDT (00:26 UTC)

Lifted

7:41 PM CDT (00:41 UTC)

On the ground

15 minutes

Path length

3.8 miles (6.0 km)

Path width

690 yards (631 m)

Deaths

0

Injuries

0

County

Marshall County

Touchdown point

34.222, -86.294

Lift-off point

34.227, -86.229

Record number

1803191826-01

58 damage points were recorded along this path by NWS BMX and NWS HUN, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF2. The highest wind the damage implies is 112 mph.

• seen to east further in woods.
• damage to West facing top of siding and shingle damage west side.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

An isolated supercell produced hail during the early afternoon hours across far northwest and north central Alabama. By mid afternoon, a cluster of supercells developed in northern Mississippi and tracked east-southeast through much of north Alabama through the early evening hours. Two main supercell clusters produced multiple tornadoes and very large hail. Tornadoes ranged in strength from EF-0 to EF-2. The largest hail fell in Cullman County, with widespread and severe damage reported as a result. The largest hail stone reported to the National Weather Service was 5.25 inches in diameter weighing 8.9 ounces.

The tornado began west of Old Oneota Road and Dixie Dale Road. Numerous trees were |either snapped or uprooted along and adjacent to Old Oneota Road, indicative of 90 mph. More significant damage was noted on the west side of Ole Oneota Road where two chicken houses and a barn were destroyed. The team determined winds to be 112 mph, or a low-end EF-2. A second set of chicken houses were destroyed near Oneota |Cutoff Rd, however these were not as heavily as damaged. As the tornado tracked due east toward Hwy 75 , the most prevalent damage was snapped or uprooted trees. On the west side of Highway 75, damage was noted to a weak farm building. Numerous snapped or uprooted trees were observed along White Oak Road and east toward Whitesville Road. Structural damage was recorded on Whitesville Road to a third set of chicken houses. The tornado was estimated to lift just east of Whitesville Road before Walnut Street.

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

15 minutes of warning. NWS HUN issued a tornado warning for this county at 00:11 UTC, 15 minutes before the tornado touched down, in force until 00:45 UTC.

The county was under a tornado watch, issued at 20:28 UTC and running to 01:46 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 20:00 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), 80 km away, was scanning. The volume nearest the touchdown began at 00:28 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 2018 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are

19 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.