Tornadoes · United States · Alabama · 2002
F1 tornado, Red Hill, Alabama, March 29, 2002
This F1 tornado ran 8.7 miles across Marshall County on March 29, 2002, touching down at 11:20 PM CST and reaching 500 yards wide. It killed nobody, and did $1.4 million of property damage.
The rating scale
Tracks are drawn in the color of the rating. The Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.
F040 to 72 mph
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
F173 to 112 mphthis tornado
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
F2113 to 157 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.
F3158 to 206 mph
Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.
F4207 to 260 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
F5261 to 318 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
- F1
- Date
- March 29, 2002
- Touchdown
- 11:20 PM CST (05:20 UTC)
- Path length
- 8.7 miles (14.0 km)
- Path width
- 500 yards (457 m)
- Deaths
- 0
- Injuries
- 0
- Property damage
- $1.4 million
- County
- Marshall County
- Touchdown point
- 34.250, -86.450
- Lift-off point
- 34.250, -86.280
- Record number
- 17
What the Weather Service recorded
A tornado first touched down at a cemetary just west of Red Hill. The F1 tornado travelled on a near due east path crossing CR 14 (Warrenton Road), a small ridge and SR 79. The tornado then climbed another ridge downing trees. Once on top of the ridge, the tornado paralleled Section Line Road (CR 166) downing trees and power lines and causing damage especially to out buildings, farm buildings, chicken houses, and other weak structures. Most substantial structures affected by the tornado had minimal damage as identified from visual inspection. The tornado ended at CR 152 (Oneonta Cut Off Road). Red Cross officials identified 3 structures with major damage and 18 with minor damage. There were no deaths or injuries reported with this tornado.Beg. 34 15.404/86 26.232 End: 34 15.291/86 16.998
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.
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 Slight Risk. The outlook in force was issued at 01:00 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 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
5.3 hours before the tornado, 125 km from the path. March 30, 2002.
- Mixed-layer CAPE
- 1146 J/kg
- Mixed-layer CIN
- -10 J/kg
- Surface CAPE
- 1545 J/kg
- Mixed-layer LCL
- 1460 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 308 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 6.9
- 0-3 km lapse rate
- 7.2 K/km
Birmingham, AL (KBMX), 12:00Z
6.7 hours after it, 125 km from the path. March 30, 2002.
- Mixed-layer CAPE
- 740 J/kg
- Mixed-layer CIN
- -8 J/kg
- Surface CAPE
- 1463 J/kg
- Mixed-layer LCL
- 667 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.1
- 0-3 km lapse rate
- 5.8 K/km
The radar
The Northeast Alabama radar (KHTX), 80 km away, was scanning. The volume nearest the touchdown began at 05:17 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.
This ground now
The live radar over the trackEvery 2002 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are
The other tornadoes of March 29, 2002
3 more were confirmed in the United States that day.
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.