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.

  1. F040 to 72 mph

    Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

  2. F173 to 112 mphthis tornado

    Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

  3. 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.

  4. 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.

  5. F4207 to 260 mph

    Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

  6. 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.

  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
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.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2002-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1146 joules per kilogram, CIN -10, lifted condensation level 1460 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 2002-03-30The 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 123 square meters per square second, 0 to 6 km bulk shear 41 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
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

Open this sounding in Storm Lab

Birmingham, AL (KBMX), 12:00Z

6.7 hours after it, 125 km from the path. March 30, 2002.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2002-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 740 joules per kilogram, CIN -8, lifted condensation level 667 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 12:00Z on 2002-03-30The 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 -28 square meters per square second, 0 to 6 km bulk shear 39 knots.19395878Sfc1 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
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

Open this sounding in Storm Lab

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.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
March 295:08 PM CSTF0Poinsett, AR0.210
March 296:45 PM ESTF0Breathitt, KY0.120$1,000
March 2910:05 PM CSTF0Taylor, TX0.220

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.