Tornadoes · United States · Alabama · 2003

F1 tornado, Wedowee, Alabama, May 7, 2003

This F1 tornado ran 12.9 miles across Randolph County on May 7, 2003, touching down at 4:40 PM CDT and reaching 500 yards wide. It killed nobody, and did $90,000 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
May 7, 2003
Touchdown
4:40 PM CDT (21:40 UTC)
Path length
12.9 miles (20.8 km)
Path width
500 yards (457 m)
Deaths
0
Injuries
0
Property damage
$90,000
County
Randolph County
Touchdown point
33.280, -85.480
Lift-off point
33.370, -85.270
Record number
302

What the Weather Service recorded

A tornado touched down 1.6 miles south-southwest of Wedowee or just west of CR 15. The tornado crossed CR 15 and US 431 where a restaurant and several other buildings suffered minor damage. The tornado continued on an east-northeast path crossing through primarily rural areas damaging a few buildings and downing a large number of trees. Tornado intensity varied along the path and in some locations there was significant tree damage with some trees splintered. The tornado crossed through the Napoleon area and crossed CR 39 before ending close to the Alabama-Georgia state line. Damage toward the end of the path became very minor.Beg: 33 17.229/85 29.559 End: 33 21.147/85 16.994

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

The warnings

31 minutes of warning. NWS BMX issued a tornado warning for this county at 21:09 UTC, 31 minutes before the tornado touched down, in force until 22:00 UTC.

Issued (UTC)ExpiredProductOffice
20:13 UTC21:15 UTCTornado WarningBMX
20:50 UTC01:00 UTCFlash Flood WarningBMX
21:09 UTC22:00 UTCTornado WarningBMX
21:23 UTC22:15 UTCTornado WarningBMX
22:08 UTC23:00 UTCTornado WarningBMX
22:55 UTC23:45 UTCTornado WarningBMX
23:41 UTC00:15 UTCTornado WarningBMX
00:22 UTC04:15 UTCFlash Flood WarningBMX
04:06 UTC08:00 UTCFlash Flood 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 20:11 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.

Peachtre/Fal Fld, GA (KFFC), 12:00Z

9.7 hours before the tornado, 81 km from the path. May 7, 2003.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2003-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 913 joules per kilogram, CIN -121, lifted condensation level 601 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, Peachtre/Fal Fld, GA at 12:00Z on 2003-05-07The 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 147 square meters per square second, 0 to 6 km bulk shear 48 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
913 J/kg
Mixed-layer CIN
-121 J/kg
Surface CAPE
68 J/kg
Mixed-layer LCL
601 m above ground
0-6 km bulk shear
48 kt
0-1 km bulk shear
28 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7
0-3 km lapse rate
4.3 K/km

Open this sounding in Storm Lab

The radar

The Atlanta radar (KFFC), 75 km away, was scanning. The volume nearest the touchdown began at 21:38 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 2003 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are

The other tornadoes of May 7, 2003

28 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 72:03 AM CDTF1Hot Spring, AR4.0300
May 72:10 AM CDTF0Marion, TX to LA13.025
May 75:16 AM CDTF1Arkansas, AR2.9350
May 75:43 AM CDTF1Lincoln Parish, LA5.3100
May 79:25 AM CDTF2Chickasaw, MS27.54406$3.0 million
May 711:11 AM CDTF1Lamar, AL0.525$10,000
May 712:11 PM CDTF1Walker, AL2.440$20,000
May 72:10 PM CDTF1St. Clair, AL4.550$90,000
May 72:40 PM CDTF1Talladega, AL4.650$10,000
May 72:45 PM CDTF1Shelby, AL1.350$170,000
May 72:46 PM CDTF1Dallas, AR27.2150
May 73:20 PM CDTF0Scott, MS0.330$10,000
May 73:21 PM CDTF0St. Clair, AL0.225$10,000
May 72:30 PM MDTF0Adams, CO0.150
May 73:41 PM CDTF0Clay, AL1.270$1,000
May 73:45 PM CDTF0Newton, MS0.530$30,000
May 73:57 PM CDTF0Clay, AL1.150$2,000
May 74:08 PM CDTF0Clay, AL1.220$3,000
May 75:25 PM EDTF1Fauquier, VA5.075$10,000
May 76:15 PM EDTF0Heard, GA0.150$80,000
May 76:20 PM EDTF0Heard, GA0.250$3,000
May 75:31 PM CDTF0Marengo, AL0.140$1,000
May 76:32 PM EDTF0Coweta, GA0.125$1,000
May 77:23 PM EDTF0Saint Mary's, MD0.575$30,000
May 77:30 PM EDTF0Saint Mary's, MD2.0100$30,000
May 77:50 PM CDTF1Callahan, TX3.0500
May 78:00 PM CDTF0Eastland, TX0.350
May 710:18 PM CDTF0Wilbarger, 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.