Tornadoes · United States · Alabama · 2021
EF1 tornado, Berlin to Simcoe, Alabama, March 28, 2021
From Berlin to Simcoe, this EF1 tornado ran 2.1 miles across Cullman County on March 28, 2021, touching down at 5:38 AM CDT and reaching 100 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.
EF065 to 85 mph
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
EF186 to 110 mphthis tornado
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
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.
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.
EF4166 to 200 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
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.
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
- EF1
- Date
- March 28, 2021
- Touchdown
- 5:38 AM CDT (10:38 UTC)
- Lifted
- 5:42 AM CDT (10:42 UTC)
- On the ground
- 4 minutes
- Path length
- 2.1 miles (3.4 km)
- Path width
- 100 yards (91 m)
- Deaths
- 0
- Injuries
- 0
- County
- Cullman County
- Touchdown point
- 34.190, -86.740
- Lift-off point
- 34.201, -86.706
- Record number
- 2103280438-01
The damage survey
9 damage points were recorded along this path by NWS HUN, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 86 mph.
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
A strong to severe line of thunderstorms, some with embedded supercellular storms, roared east across north Alabama from shortly after Midnight through around 6 am LST. Damaging winds were reported at numerous locations, including a narrow swath of damage with winds up to 80 mph in the town of Russellville in Franklin County, a short track EF-1 tornado in Fairview in Cullman County, and a narrow swath of damage with winds up to 85 mph in the town of Fyffe in DeKalb County.
A tornado touched down southwest of the Fairview community in Cullman County, snapping trees near the intersection of CR 747 and 1621. From there, the tornado moved northeast and continued snapping numerous hard and softwood trees along the path. Along CR 1634, the tornado destroyed a couple of farm outbuildings and was at its widest point near this location. A large swath of trees in a grove were snapped and uprooted to the northeast of the outbuilding damage. Damage continued as the tornado moved northeast, snapping trees, stopping short of County Road 1651. This was the end of the tornado path.
From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.
The warnings
No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.
The county was under a tornado watch, issued at 04:28 UTC and running to 10:48 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 21:28 UTC | 22:15 UTC | Severe Thunderstorm Warning | HUN |
| 22:14 UTC | 22:33 UTC | Severe Thunderstorm Warning | HUN |
| 04:28 UTC | 10:48 UTC | Tornado Watch | HUN |
| 10:02 UTC | 10:30 UTC | Severe Thunderstorm Warning | HUN |
| 10:30 UTC | 11:00 UTC | Severe Thunderstorm Warning | HUN |
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 Marginal Risk, with a 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 05:55 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
10.6 hours before the tornado, 113 km from the path. March 28, 2021.
- Mixed-layer CAPE
- 643 J/kg
- Mixed-layer CIN
- -22 J/kg
- Surface CAPE
- 1363 J/kg
- Mixed-layer LCL
- 1359 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.7
- 0-3 km lapse rate
- 7.6 K/km
Birmingham, AL (KBMX), 12:00Z
1.4 hours after it, 113 km from the path. March 28, 2021.
- Mixed-layer CAPE
- 757 J/kg
- Mixed-layer CIN
- -3 J/kg
- Surface CAPE
- 1422 J/kg
- Mixed-layer LCL
- 650 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 326 m²/s²
- 0-3 km storm-relative helicity
- 355 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 9.1
- 0-3 km lapse rate
- 7.0 K/km
The radar
The Northeast Alabama radar (KHTX), 101 km away, was scanning. The volume nearest the touchdown began at 10:37 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) | Report | Where | County | Remark |
|---|---|---|---|---|
| 08:22 UTC | TSTM WND DMG | 6 E Somerville | Morgan, AL | REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF. |
| 08:56 UTC | TSTM WND GST 60 | 1 N Trinity | Morgan, AL | ESTIMATED WINDS OF 60 MPH OR HIGHER IN TRINITY. |
| 09:02 UTC | TSTM WND GST 51 | 4 Wnw Mooresville | Limestone, AL | AT PRYOR FIELD IN DECATUR. |
| 09:09 UTC | TSTM WND DMG | 3 Wnw Huntsville | Madison, AL | AT LEAST 3 TO 5 TREES WERE UPROOTED OR BLOWN DOWN IN THE SHERWOOD PARK COMMUNITY NEAR HERMITAGE WOOD ROAD. THE TOP OF ONE TREE WAS SNAPPED OFF 8 TO 10 FEET UP FROM ITS BASE ON GREENDALE DRIVE NW IN THIS NEIGHBORHOOD. |
| 10:08 UTC | HAIL 0.5 | 5 Se Huntsville | Madison, AL | |
| 10:33 UTC | TSTM WND DMG | 3 Ene Cullman | Cullman, AL | *** 1 INJ *** MOBILE HOME WAS BLOWN OFF OF ITS FOUNDATION. A PERSON INSIDE SUFFERED MINOR INJURIES. TIME ESTIMATED FROM RADAR. OTHER TREES WERE DOWNED NE OF CULLMAN TOWARDS THE COMMUNITY OF FAIRVIEW. |
| 10:55 UTC | TSTM WND DMG | 12 W Good Hope | Cullman, AL | REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN; POWER POLES BROKEN. |
| 11:10 UTC | TSTM WND DMG | 1 W Guntersville | Marshall, AL | NUMEROUS TREES DOWN NEAR THE COURTHOUSE IN GUNTERSVILLE. |
| 11:15 UTC | TSTM WND DMG | 7 W Geraldine | Marshall, AL | ROOF DAMAGE NEAR THE ASBURY COMMUNITY. |
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
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.