Tornadoes · United States · Alabama · 2005

F0 tornado, Aliceville, Alabama, April 6, 2005

This F0 tornado ran 1.5 miles across Pickens County on April 6, 2005, touching down at 5:51 PM CDT and reaching 50 yards wide. It killed nobody, and did $50,000 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 mphthis tornado

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

  2. F173 to 112 mph

    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
F0
Date
April 6, 2005
Touchdown
5:51 PM CDT (22:51 UTC)
Path length
1.5 miles (2.4 km)
Path width
50 yards (46 m)
Deaths
0
Injuries
0
Property damage
$50,000
County
Pickens County
Touchdown point
33.130, -88.170
Lift-off point
33.150, -88.150
Record number
70

What the Weather Service recorded

National Weather Service Meteorologists surveyed the damage in Aliceville and determined that the damage was caused by a tornado. The tornado was rated an F0 on the Fujita Scale with localized winds of up to 73 miles an hour. The tornado touched down near the Aliceville Manor nursing home at approximately 551 pm CDT. The weak tornado tracked northeast generally parallel to 17th Street NW. At least 9 homes suffered mainly minor roof damge, although one house had major rood damage. A few porches were completely torn off homes and the debris was tossed up to one half of a mile away. Several outbuildings were damaged and many lawn or outdoor items were overturned. The tornado crossed SR 14 where a few large trees were snapped off or uprooted at the Aliceville Country Club. Several additional trees and power lines were blown down along the relatively short path. The tornado lifted at the end of Country Club Lane at the Aliceville Country Club at approximately 553 pm CDT. The tornado pathlength was one and one half miles long and 50 yards wide at its widest point. No injuries were reported. Begin: 33 07.83/88 10.47 End: 33 08.70/88 09.31

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.

Issued (UTC)ExpiredProductOffice
22:24 UTC23:30 UTCSevere Thunderstorm WarningBMX
03:22 UTC03:45 UTCSevere Thunderstorm 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 Slight Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 20:09 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

10.9 hours before the tornado, 129 km from the path. April 6, 2005.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2005-04-06Temperature 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 -45968, lifted condensation level 1203 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 2005-04-06The 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 148 square meters per square second, 0 to 6 km bulk shear 39 knots.193958Sfc1 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
-45968 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
1203 m above ground
0-6 km bulk shear
39 kt
0-1 km bulk shear
30 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
2.6 K/km

Open this sounding in Storm Lab

Birmingham, AL (KBMX), 00:00Z

1.1 hours after it, 129 km from the path. April 7, 2005.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2005-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 31 joules per kilogram, CIN -56, lifted condensation level 831 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 2005-04-07The 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 73 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
31 J/kg
Mixed-layer CIN
-56 J/kg
Surface CAPE
225 J/kg
Mixed-layer LCL
831 m above ground
0-6 km bulk shear
73 kt
0-1 km bulk shear
44 kt
0-1 km storm-relative helicity
341 m²/s²
0-3 km storm-relative helicity
365 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7
0-3 km lapse rate
5.9 K/km

Open this sounding in Storm Lab

The radar

The Columbus AFB radar (KGWX), 86 km away, was scanning. The volume nearest the touchdown began at 22:52 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 2005 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are

The other tornadoes of April 6, 2005

22 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
April 67:10 AM CDTF3Rankin, MS15.06006$11 million
April 67:36 AM CDTF0Madison, MS2.530$1,000
April 67:40 AM CDTF0Tangipahoa Parish, LA0.220$2,000
April 67:50 AM CDTF2Pike, MS16.01002$500,000
April 67:58 AM CDTF1Rankin, MS1.0200$10,000
April 68:00 AM CDTF1Scott, MS6.0200$700,000
April 68:26 AM CDTF1Leake, MS23.0300$500 million
April 68:32 AM CDTF1Lawrence, MS3.550$80,000
April 69:06 AM CDTF1Simpson, MS7.050$4,000
April 69:42 AM CDTF2Smith, MS13.5500$160,000
April 610:06 AM CDTF0Lincoln, MS0.750$10,000
April 610:10 AM CDTF3Covington, MS28.0600$8.0 million
April 610:22 AM CDTF1Jefferson Parish, LA13.040$120,000
April 611:23 AM CDTF0Smith, MS0.530$2,000
April 611:35 AM CDTF1Hancock, MS1.530$50,000
April 612:12 PM CDTF2Lafourche Parish, LA2.0502$250,000
April 612:49 PM CDTF1Clarke, MS2.075$40,000
April 61:10 PM CDTF1Plaquemines Parish, LA1.050$20,000
April 63:10 PM CDTF1Leake, MS3.0200$250,000
April 63:43 PM CDTF1Smith, MS3.075$30,000
April 65:53 PM CDTF0Covington, MS0.550$10,000
April 69:12 PM CDTF1Smith, MS6.075$300,000

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.