Tornadoes · United States · Alabama · 2000

F1 tornado, Forestdale, Alabama, April 2, 2000

This F1 tornado ran 4.5 miles across Jefferson County on April 2, 2000, touching down at 9:51 PM CDT and reaching 400 yards wide. It killed nobody, and did $150,000 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
April 2, 2000
Touchdown
9:51 PM CDT (02:51 UTC)
Path length
4.5 miles (7.2 km)
Path width
400 yards (366 m)
Deaths
0
Injuries
0
Property damage
$150,000
County
Jefferson County
Touchdown point
33.580, -86.850
Lift-off point
33.580, -86.850
Record number
148

What the Weather Service recorded

The tornado first caused damage just east of Minor Parkway and moved northeast along Crumley Chapel Road and through the Crumley Chapel community. The tornado crossed US 78 at the Wal-Mart shopping center and turned on a more easterly track through a residential area of Forestdale. The damage became less severe as the tornado crossed Cherry Lane with only minor tree damage from there to Coalburg Road.Damage along the track was primarily to trees with some minor roof damage to some houses. A number of houses along the path were severely damaged when trees, some quite large, fell on the structures. Beginning: 33 33.650/86 55.378 End: 33 35.341/86 51.737

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

The warnings

7 minutes of warning. NWS BMX issued a tornado warning for this county at 02:44 UTC, 7 minutes before the tornado touched down, in force until 03:30 UTC.

Issued (UTC)ExpiredProductOffice
02:34 UTC03:30 UTCSevere Thunderstorm WarningBMX
02:44 UTC03:30 UTCTornado WarningBMX
17:29 UTC18:30 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 Slight Risk. The outlook in force was issued at 00:50 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

2.9 hours before the tornado, 45 km from the path. April 3, 2000.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2000-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 430 joules per kilogram, CIN -57, lifted condensation level 982 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 2000-04-03The 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 851 square meters per square second, 0 to 6 km bulk shear 81 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
430 J/kg
Mixed-layer CIN
-57 J/kg
Surface CAPE
532 J/kg
Mixed-layer LCL
982 m above ground
0-6 km bulk shear
81 kt
0-1 km bulk shear
81 kt
0-1 km storm-relative helicity
851 m²/s²
0-3 km storm-relative helicity
851 m²/s²
Significant tornado parameter
2.3
Supercell composite
21.3
0-3 km lapse rate
6.5 K/km

Open this sounding in Storm Lab

Birmingham, AL (KBMX), 12:00Z

9.1 hours after it, 45 km from the path. April 3, 2000.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2000-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 162 joules per kilogram, CIN -57, lifted condensation level 777 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 2000-04-03The 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 178 square meters per square second, 0 to 6 km bulk shear 73 knots.1939587897117Sfc1 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
162 J/kg
Mixed-layer CIN
-57 J/kg
Surface CAPE
3 J/kg
Mixed-layer LCL
777 m above ground
0-6 km bulk shear
73 kt
0-1 km bulk shear
25 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3
0-3 km lapse rate
4.6 K/km

Open this sounding in Storm Lab

The radar

The Birmingham radar (KBMX), 46 km away, was scanning. The volume nearest the touchdown began at 02:51 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 2000 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are

The other tornadoes of April 2, 2000

5 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
April 26:25 PM CDTF1Evangeline Parish, LA1.010$50,000
April 26:30 PM CDTF0Neshoba, MS1.050$10,000
April 26:30 PM CDTF0Cameron Parish, LA5.010
April 26:40 PM CDTF1Cameron Parish, LA15.0202$300,000
April 212:34 AM CDTF2Cleburne, AL1.910016$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.