Tornadoes · United States · Alabama · 2001

F1 tornado, Uniontown, Alabama, October 13, 2001

This F1 tornado ran 1.5 miles across Perry County on October 13, 2001, touching down at 2:38 PM CDT and reaching 50 yards wide. It killed nobody, and did $110,000 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
October 13, 2001
Touchdown
2:38 PM CDT (19:38 UTC)
Path length
1.5 miles (2.4 km)
Path width
50 yards (46 m)
Deaths
0
Injuries
0
Property damage
$110,000
County
Perry County
Touchdown point
32.450, -87.520
Lift-off point
32.470, -87.520
Record number
496

What the Weather Service recorded

A small tornado touched down just southwest of Uniontown in an open area and traveled north-northeast across the western portions of Uniontown. The tornado ended just north-northwest of Uniontown in an open area. The tornado tore shingles off several houses in the southwest section of Uniontown in addition to downing trees and power lines. The tornado did similar damage to residential structures in the northwest portion of Uniontown. A one-story apartment complex lost a portion of it's roof. Several trees fell on homes and blocked residential streets. Beginning: 32 26.587/87 31.219 End: 32 27.857/87 30.951

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. One was issued for the county at another hour that day.

Issued (UTC)ExpiredProductOffice
19:10 UTC19:45 UTCSevere Thunderstorm WarningBMX
19:59 UTC20:45 UTCSevere Thunderstorm WarningBMX
20:49 UTC21:15 UTCTornado WarningBMX

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. The outlook in force was issued at 17:04 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), 12:00Z

7.6 hours before the tornado, 106 km from the path. October 13, 2001.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2001-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 185 joules per kilogram, CIN -20, lifted condensation level 592 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 2001-10-13The 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 233 square meters per square second, 0 to 6 km bulk shear 37 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
185 J/kg
Mixed-layer CIN
-20 J/kg
Surface CAPE
573 J/kg
Mixed-layer LCL
592 m above ground
0-6 km bulk shear
37 kt
0-1 km bulk shear
32 kt
0-1 km storm-relative helicity
233 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.3
0-3 km lapse rate
4.9 K/km

Open this sounding in Storm Lab

Birmingham, AL (KBMX), 00:00Z

4.4 hours after it, 106 km from the path. October 14, 2001.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2001-10-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 222 joules per kilogram, CIN -7, lifted condensation level 558 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 2001-10-14The 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 569 square meters per square second, 0 to 6 km bulk shear 65 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
222 J/kg
Mixed-layer CIN
-7 J/kg
Surface CAPE
350 J/kg
Mixed-layer LCL
558 m above ground
0-6 km bulk shear
65 kt
0-1 km bulk shear
44 kt
0-1 km storm-relative helicity
569 m²/s²
0-3 km storm-relative helicity
684 m²/s²
Significant tornado parameter
1.0
Supercell composite
4.6
0-3 km lapse rate
5.0 K/km

Open this sounding in Storm Lab

This ground now

The live radar over the trackEvery 2001 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are

The other tornadoes of October 13, 2001

31 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
October 132:39 AM CDTF1Trinity, TX0.530$10,000
October 132:45 AM CDTF1Polk, TX0.325$30,000
October 134:55 AM CDTF1Jefferson, TX2.015$1.0 million
October 135:05 AM CDTF1Beauregard Parish, LA0.510$50,000
October 137:30 AM CDTF1Baldwin, AL0.130$50,000
October 137:35 AM CDTF0Baldwin, AL0.120$10,000
October 138:39 AM CDTF0Rankin, MS0.230
October 138:45 AM CDTF1Acadia Parish, LA0.510$120,000
October 138:45 AM CDTF0Rankin, MS0.230$10,000
October 139:00 AM CDTF1Vermilion Parish, LA0.510$70,000
October 1310:25 AM CDTF0Copiah, MS0.230
October 1310:30 AM CDTF0Lincoln, MS1.040$30,000
October 1312:55 PM CDTF0Marion, MS0.225$1,000
October 131:00 PM CDTF0Baldwin, AL0.230$20,000
October 131:25 PM CDTF3Baldwin, AL1.0440$250,000
October 131:30 PM CDTF0Lamar, MS0.225$1,000
October 131:35 PM CDTF1Marengo, AL7.1450$40,000
October 131:40 PM CDTF0Baldwin, AL0.230$10,000
October 131:44 PM CDTF2Baldwin, AL0.7200$200,000
October 131:58 PM CDTF0Jones, MS0.225
October 132:20 PM CDTF0Jones, MS0.225$30,000
October 132:45 PM CDTF0Baldwin, AL0.330$30,000
October 133:05 PM CDTF0Clarke, MS0.230$1,000
October 133:40 PM CDTF0Lauderdale, MS0.325$3,000
October 133:59 PM CDTF1Lowndes, MS0.230$80,000
October 134:40 PM CDTF1Santa Rosa, FL0.550$620,000
October 135:35 PM CDTF0Escambia, FL2.0200$250,000
October 136:20 PM CDTF0Plaquemines Parish, LA0.320$10,000
October 1310:15 PM CDTF1Walton, FL1.0100$750,000
October 1311:00 PM CDTF1Washington, FL2.7100$300,000
October 131:30 AM EDTF1Franklin, FL0.250$330,000

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.