Tornadoes · United States · Alabama · 1998
F0 tornado, Carrollton to Holman, Alabama, May 9, 1998
From Carrollton to Holman, this F0 tornado ran 6.5 miles across Pickens and Tuscaloosa counties on May 9, 1998, touching down at 7:20 PM CDT and reaching 70 yards wide. It killed nobody, and did $40,000 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.
F040 to 72 mphthis tornado
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
F173 to 112 mph
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
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.
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.
F4207 to 260 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
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.
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
- May 9, 1998
- Touchdown
- 7:20 PM CDT (00:20 UTC)
- Path length
- 6.5 miles (10.5 km)
- Path width
- 70 yards (64 m)
- Deaths
- 0
- Injuries
- 0
- Property damage
- $40,000
- Counties
- Pickens and Tuscaloosa counties
- Touchdown point
- 33.300, -87.900
- Lift-off point
- 33.300, -87.800
- Record number
- 960
What the Weather Service recorded
A weak tornado touched down in a wooded area south of Gordo producing damage along a 6.5 mile track crossing from Pickens County into Tuscaloosa County. Damage was primarily in the form of downed trees though several structures sustained minor damage. This tornado apparently came out of the same thunderstorm that produced the weak tornado on the north side of Carrollton earlier. This tornado damage path also crossed the damage path that occurred with the F3 tornado on April 8, 1998.
A weak tornado touched down northwest of Carrollton and uprooted and snapped several trees. The tornado actually moved across the Pickens County Hospital on the north side of Carrollton on SR 17. Minor roof damage was done at the hospital but there were a number of trees down.
From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.
The warnings
52 minutes of warning. NWS BMX issued a tornado warning for this county at 23:28 UTC, 52 minutes before the tornado touched down, in force until 00:45 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 23:28 UTC | 00:45 UTC | Tornado Warning | BMX |
| 00:41 UTC | 01:15 UTC | Tornado Warning | BMX |
| 02:55 UTC | 03:45 UTC | Severe Thunderstorm Warning | BMX |
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 09:56 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
0.3 hours before the tornado, 100 km from the path. May 10, 1998.
- Mixed-layer CAPE
- 213 J/kg
- Mixed-layer CIN
- -309 J/kg
- Surface CAPE
- 499 J/kg
- Mixed-layer LCL
- 1398 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 241 m²/s²
- 0-3 km storm-relative helicity
- 355 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
- 0-3 km lapse rate
- 6.0 K/km
Birmingham, AL (KBMX), 12:00Z
11.7 hours after it, 100 km from the path. May 10, 1998.
- Mixed-layer CAPE
- 211 J/kg
- Mixed-layer CIN
- -41 J/kg
- Surface CAPE
- 185 J/kg
- Mixed-layer LCL
- 819 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
- 0-3 km lapse rate
- 5.0 K/km
This ground now
The live radar over the trackEvery 1998 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are
The other tornadoes of May 9, 1998
4 more were confirmed in the United States that day.
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.