Tornadoes · United States · Alabama · 2021

EF2 tornado, Lavaca to Half Acre, Alabama, March 25, 2021

From Lavaca to Half Acre, this EF2 tornado ran 9.6 miles across Choctaw and Marengo counties on March 25, 2021, touching down at 7:13 PM CDT and reaching 250 yards wide. It killed nobody.

The rating scale

Tracks are drawn in the color of the rating. The Enhanced Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.

  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.

The record

Rating
EF2
Date
March 25, 2021
Touchdown
7:13 PM CDT (00:13 UTC)
Lifted
7:26 PM CDT (00:26 UTC)
On the ground
13 minutes
Path length
9.6 miles (15.5 km)
Path width
250 yards (229 m)
Deaths
0
Injuries
0
Counties
Choctaw and Marengo counties
Touchdown point
32.124, -88.044
Lift-off point
32.183, -87.896
Record number
2103251813-01

The damage survey

21 damage points were recorded along this path by NWS BMX and NWS MOB, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF2. The highest wind the damage implies is 134 mph.

  • Single family home was shifted approximately 6 feet eastward and a large section of the roofing was removed from the north side of the home. A small shed was destroyed and a few trees were uprooted.
  • Shed destroyed along with an uprooted tree. Path width approximately 100 yards.
  • Numerous pine trees snapped and uprooted with a path width of approximately 100 yards.
  • Large swath of pine trees all snapped near the bases. Area of snapped trees approximately 225 yards wide.

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

What the Weather Service recorded

Another in a series of powerful storm systems moved across the region during the day and through the evening. A very unstable airmass developed across the area. This system produced a tornado outbreak just north of the area, however one tornado developed in Choctaw and caused damage.

A potent storm system affected Central Alabama on Thursday, March 25th. A highly-sheared environment combined with increasing instability produced numerous tornadic thunderstorms. Severe parameters were supportive of significant and long-track supercells, prompting the issuance of a rare High Risk Convective Outlook from the Storm Prediction Center for portions of Central Alabama.||A total of 10 tornado tracks were surveyed in Central Alabama. This included 4 EF3 tornadoes, 3 EF2 tornadoes, and 3 EF1 tornadoes. Damage was significant along the paths of the most intense tornadoes and, unfortunately, injuries and fatalities occurred. |Some storms were cyclic, meaning multiple tornadoes were produced by the same storm. The most impressive tornado of the event was the long-track tornado that traveled nearly 80 miles from Hale County to Shelby County. This ranked as the seventh longest single tornado track in the state of Alabama.

The tornado first touched down just west of the Tombigbee River|and just south of Highway 10 in far eastern Choctaw county, AL. The tornado|intensified rapidly upon touchdown and heavily damaged a single family home.|The home was shifted nearly 6 feet off of the foundation. In addition, a|large section of the roof was removed and a small shed adjacent|to the home was destroyed. A few large trees were also uprooted and a power|pole in front of the home was snapped. This tornado continued east across|the river into Marengo county, AL, which is covered by the National Weather|Service office in Birmingham, AL.

National Weather Service meteorologists surveyed damage in southwest Marengo County and determined that it was consistent with an EF2 tornado, with maximum winds near 115 mph.||The tornado crossed the Tombigbee River from Choctaw County just south of Highway 10. It produced significant damage on South Riverview Lane, just south of Alabama Highway 10. In this area, an older single wide mobile home was destroyed with the frame tossed at least 50 yards to the east. In addition, a large storage building was also destroyed. Significant tree damage was noted in the area with several hardwood and softwoods snapped and uprooted. In this area, the tornado is estimated to have been at low end EF2 intensity with winds around 115 mph. The tornado continued northeast and crossed Highway 10, producing substantial tree damage and also heavily damaging one barn and destroying another. The tornado continued to produce substantial tree damage as it crossed Highway 69. As the tornado moved east of Highway 69, the road network did not allow the survey team to assess the damage over a large forested area. However, damage was noted along Highway 17, north of Beaver Creek Road. It is not known how much farther to the northeast the tornado continued due to no road access, but the tornado did not reach Highway 43.

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

The warnings

13 minutes of warning. NWS MOB issued a tornado warning for this county at 00:00 UTC, 13 minutes before the tornado touched down, in force until 00:30 UTC.

The county was under a tornado watch, issued at 16:27 UTC and running to 00:42 UTC.

Issued (UTC)ExpiredProductOffice
09:00 UTC00:35 UTCWind AdvisoryMOB
12:36 UTC13:00 UTCSevere Thunderstorm WarningMOB
16:27 UTC00:42 UTCTornado WatchMOB
23:20 UTC00:00 UTCSevere Thunderstorm WarningMOB
23:58 UTC00:22 UTCSevere Thunderstorm WarningMOB
00:00 UTC00:30 UTCTornado WarningMOB

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 forecast that day

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 22:26 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 air that afternoon

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.

Birmingham, AL (KBMX), 00:00Z

0.2 hours before the tornado, 160 km from the path. March 26, 2021.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2021-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1313 joules per kilogram, CIN -13, lifted condensation level 662 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Birmingham, AL at 00:00Z on 2021-03-26The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 341 square meters per square second, 0 to 6 km bulk shear 68 knots.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
1313 J/kg
Mixed-layer CIN
-13 J/kg
Surface CAPE
1847 J/kg
Mixed-layer LCL
662 m above ground
0-6 km bulk shear
68 kt
0-1 km bulk shear
40 kt
0-1 km storm-relative helicity
341 m²/s²
0-3 km storm-relative helicity
334 m²/s²
Significant tornado parameter
3.1
Supercell composite
13.2
0-3 km lapse rate
5.3 K/km

Open this sounding in Storm Lab

Birmingham, AL (KBMX), 12:00Z

11.8 hours after it, 160 km from the path. March 26, 2021.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2021-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 0 joules per kilogram, CIN -84947, lifted condensation level 1285 meters above ground. Wind barbs in knots down the right edge.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Birmingham, AL at 12:00Z on 2021-03-26The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity -55 square meters per square second, 0 to 6 km bulk shear 72 knots.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
-84947 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
1285 m above ground
0-6 km bulk shear
72 kt
0-1 km bulk shear
19 kt
0-1 km storm-relative helicity
-55 m²/s²
0-3 km storm-relative helicity
151 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1
0-3 km lapse rate
3.3 K/km

Open this sounding in Storm Lab

The surface observations

Demopolis (DYA), 35 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
22:15 UTC73.469.8190° 7 kt1008.5
22:35 UTC7370160° 7 kt1008.5
22:55 UTC7370170° 5 kt1008.1
23:15 UTC7370.2170° 6 kt1008.1
23:35 UTC7370190° 5 kt1008.5
23:55 UTC7370160° 9 kt1008.1RA
00:15 UTC71.871.2180° 8 kt191008.5+RA
00:35 UTC71.671.6170° 6 kt1009.1
00:55 UTC71.671.6190° 4 kt1009.5
01:15 UTC7171200° 6 kt1009.8
01:35 UTC7169.4210° 6 kt1010.2
01:55 UTC70.769.4200° 4 kt1010.8

From the Iowa Environmental Mesonet's archive of airport observations.

The radar

The Birmingham radar (KBMX), 160 km away, was scanning. The volume nearest the touchdown began at 00:15 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.

What was reported nearby

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

Time (UTC)ReportWhereCountyRemark
21:26 UTCTORNADO3 Nne Duffy'S BendHale, ALAN EF3 TORNADO TRACKED FOR 80 MILES ACROSS HALE, PERRY, BIBB, CHILTON AND SHELBY COUNTIES. COUNTLESS TREES WERE DOWNED AND HUNDREDS OF STRUCTURES WERE DAMAGED OR DESTROYED.
00:12 UTCTSTM WND DMG3 Wnw NanafaliaMarengo, ALSEVERAL TRAILERS DAMAGED AND TREES DOWN FROM RIVERVIEW LANE NEAR HIGHWAY 10 EASTWARD ACROSS HIGHWAY 69. POSSIBLE TORNADO.
00:13 UTCTORNADO2 Ese LavacaChoctaw, ALTHE TORNADO FIRST TOUCHED DOWN JUST WEST OF THE TOMBIGBEE RIVER AND JUST SOUTH OF HIGHWAY 10 IN FAR EASTERN CHOCTAW COUNTY, AL. THE TORNADO INTENSIFIED RAPIDLY UPON TOUCHDOWN AND HEAVILY DAMAGED A SINGLE FAMILY HOME. THE
00:14 UTCTORNADO3 Wnw NanafaliaMarengo, ALA TORNADO MOVED INTO MARENGO COUNTY FROM CHOCTAW COUNTY AND STRENGTHENED INTO AN EF2 TORNADO, DOWNING NUMEROUS TREES AND DAMAGING OR DESTROYING SEVERAL STRUCTURES.

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

This ground now

The live radar over the trackEvery 2021 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are

The other tornadoes of March 25, 2021

19 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
March 2512:16 PM CDTEF3Hale, AL11.11,400
March 2512:53 PM CDTEF3Centreville–Columbiana tornado, AL50.11,1405
March 251:35 PM CDTEF1Noxubee, MS to AL6.6515
March 252:31 PM CDTEF3Ohatchee–Piedmont tornado, AL38.21,700610
March 253:57 PM CDTEF1Greene, AL12.1600
March 254:59 PM EDTEF0Laurens, SC2.125
March 254:26 PM CDTEF3Hale, AL79.72,30013
March 254:48 PM CDTEF1Jefferson, AL4.8700
March 257:30 PM CDTEF2Wayne, TN22.13501$350,000
March 259:08 PM EDTEF1Bartow, GA1.7125$100,000
March 258:11 PM CDTEF1Rutherford, TN2.2100$50,000
March 258:25 PM CDTEF0Wilson, TN3.275$50,000
March 258:32 PM CDTEF0Ohio, KY0.750
March 259:01 PM CDTEF2Chilton, AL14.7850
March 259:16 PM CDTEF0Grayson, KY1.040
March 2510:44 PM EDTEF1Larue, KY4.775
March 259:55 PM CDTEF2Clay, AL31.31,000
March 2511:37 PM EDTEF4Newnan–Peachtree City tornado, GA38.61,850$21 million
March 2511:55 PM EDTEF1Bartow, GA2.8200$400,000

What this means

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.

Sources

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