Tornadoes · United States · Georgia · 1998
F2 tornado, Smyrna to Sandy Spgs, Georgia, April 8, 1998
From Smyrna to Sandy Spgs, this F2 tornado ran 3.5 miles across Cobb and Fulton counties on April 8, 1998, touching down at 12:20 AM EDT and reaching 200 yards wide. It killed nobody and injured 4, and did $25 million 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 mph
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 mphthis tornado
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
- F2
- Date
- April 8, 1998
- Touchdown
- 12:20 AM EDT (04:20 UTC)
- Path length
- 3.5 miles (5.6 km)
- Path width
- 200 yards (183 m)
- Deaths
- 0
- Injuries
- 4
- Property damage
- $25 million
- Counties
- Cobb and Fulton counties
- Touchdown point
- 33.880, -84.520
- Lift-off point
- 33.880, -84.420
- Record number
- 777
What the Weather Service recorded
The same supercell that had tracked from Alabama across Haralson and Paulding counties spawned another tornado in Smyrna. The touchdown was along Windy Hill Road just west of Cobb Parkway where a commercial building sustained heavy damage. A filling station and car dealership less than a block east also sustained heavy damage. There was $500,000 to $750,000 in damage to new cars. Trees over a foot in diameter were snapped or uprooted. In total, 59 buildings were damaged, but no injuries were reported. Aerial and ground surveys by NWS employees showed the path varied from 100 to 200 yards wide with a length of about 3 miles. The tornado crossed just into Fulton county near I-285 and the Chattahoochee River. Dime to quarter size hail and other wind damage were also reported in north and central Cobb county.
The tornado continued into Fulton county before lifting temporarily. Large trees were snapped, power lines were downed and damage occurred to buildings. Four minor injuries were reported.
From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.
The warnings
13 minutes of warning. NWS FFC issued a tornado warning for this county at 04:07 UTC, 13 minutes before the tornado touched down, in force until 04:45 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 22:31 UTC | 23:15 UTC | Severe Thunderstorm Warning | FFC |
| 01:44 UTC | 02:15 UTC | Severe Thunderstorm Warning | FFC |
| 03:51 UTC | 04:30 UTC | Severe Thunderstorm Warning | FFC |
| 04:07 UTC | 04:45 UTC | Tornado Warning | FFC |
| 05:13 UTC | 05:45 UTC | Tornado Warning | FFC |
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 10:55 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), 00:00Z
4.3 hours before the tornado, 57 km from the path. April 9, 1998.
- Mixed-layer CAPE
- 771 J/kg
- Mixed-layer CIN
- -28 J/kg
- Surface CAPE
- 977 J/kg
- Mixed-layer LCL
- 478 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 176 m²/s²
- 0-3 km storm-relative helicity
- 313 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 8.3
- 0-3 km lapse rate
- 5.1 K/km
Peachtre/Fal Fld, GA (KFFC), 12:00Z
7.7 hours after it, 57 km from the path. April 9, 1998.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- -2478 J/kg
- Surface CAPE
- 31 J/kg
- Mixed-layer LCL
- 1458 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -256 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
- 0-3 km lapse rate
- 4.4 K/km
This ground now
The live radar over the trackEvery 1998 tornado in GeorgiaEvery tornado in Georgia since 1950Warnings in force in Georgia nowThe forecast where you are
The other tornadoes of April 8, 1998
13 more were confirmed in the United States that day.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| April 8 | 4:40 AM CDT | F0 | Hays, TX | 0.5 | 100 | |||
| April 8 | 4:57 AM CDT | F0 | Hays, TX | 1.0 | 150 | |||
| April 8 | 7:43 AM CDT | F1 | Claiborne Parish, LA | 0.2 | 400 | $70,000 | ||
| April 8 | 10:20 AM CDT | F1 | Covington, AL | 0.1 | 30 | $30,000 | ||
| April 8 | 6:20 PM CDT | F0 | Crittenden, AR | 0.5 | 30 | $1,000 | ||
| April 8 | 7:00 PM CDT | F0 | Lawrence, TN | 0.5 | 200 | |||
| April 8 | 7:01 PM CDT | F3 | Pickens, AL | 19.5 | 300 | 1 | $820,000 | |
| April 8 | 7:42 PM CDT | F5 | Oak Grove–Birmingham tornado, AL | 30.3 | 1,320 | 32 | 259 | $200 million |
| April 8 | 8:00 PM CDT | F1 | Coffee, TN | 1.0 | 200 | $50,000 | ||
| April 8 | 8:23 PM CDT | F1 | DeKalb, AL | 1.8 | 100 | $100,000 | ||
| April 8 | 8:56 PM CDT | F2 | St. Clair, AL | 14.4 | 200 | 2 | 12 | $2.0 million |
| April 8 | 11:30 PM EDT | F1 | Haralson, GA | 3.5 | 200 | $300,000 | ||
| April 8 | 12:35 AM EDT | F2 | DeKalb, GA | 19.0 | 800 | 1 | 10 | $75 million |
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.