Tornadoes · United States · Georgia · 2004
F1 tornado, Thunderbolt to Hardeeville, Georgia, September 6, 2004
From Thunderbolt to Hardeeville, this F1 tornado ran 6.0 miles across Chatham and Jasper counties on September 6, 2004, touching down at 10:02 AM CDT and reaching 300 yards wide. It killed nobody.
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 mphthis tornado
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
- F1
- Date
- September 6, 2004
- Touchdown
- 10:02 AM CDT (15:02 UTC)
- Path length
- 6.0 miles (9.7 km)
- Path width
- 300 yards (274 m)
- Deaths
- 0
- Injuries
- 0
- Counties
- Chatham and Jasper counties
- Touchdown point
- 32.030, -80.980
- Lift-off point
- 32.120, -81.170
- Record number
- 1665
What the Weather Service recorded
Hurricane Frances made land fall over the Florida Panhandle and continued to track in a generally northward direction into Georgia, before turning more to the northeast. This track placed the Charleston County Warning Area in the favorable right side of the remnants of Frances which produced numerous tornadoes and areas of straight line wind damage over southeast Georgia and south coastal South Carolina. Several Georgia counties also experienced flash flooding as there were isolated rainfall amounts of 5 to 8 inches over a 24 to 36 hour period. This was on top of already saturated ground from heavy rains during the month of August. The South Carolina counties experienced more nuisance type flooding as the rainfall amounts were not as high as what occurred in southeast Georgia.
Hurricane Frances made land fall over the Florida Panhandle and continued to track in a generally northward direction into Georgia, before turning more to the northeast. This track placed the Charleston County Warning Area in the favorable right side of the remnants of Frances which produced numerous tornadoes and areas of straight line wind damage over southeast Georgia and south coastal South Carolina. Several Georgia counties also experienced flash flooding as there were isolated rainfall amounts of 5 to 8 inches over a 24 to 36 hour period. This was on top of already saturated ground from heavy rains during the month of August. The South Carolina counties experienced more nuisance type flooding as the rainfall amounts were not as high as what occurred in southeast Georgia.
A tornado knocked down trees and power lines and destroyed a fence. The tornado tracked into Jasper county South Carolina before dissipating.
A tornado crossed into Jasper County from Chatham County Georgia. The tornado tracked through a marshy area and no significant damage occurred.
From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.
The warnings
6 minutes of warning. NWS CHS issued a tornado warning for this county at 14:56 UTC, 6 minutes before the tornado touched down, in force until 15:30 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 03:59 UTC | 04:30 UTC | Tornado Warning | CHS |
| 04:32 UTC | 05:00 UTC | Tornado Warning | CHS |
| 06:40 UTC | 07:15 UTC | Tornado Warning | CHS |
| 11:29 UTC | 12:00 UTC | Tornado Warning | CHS |
| 14:56 UTC | 15:30 UTC | Tornado Warning | CHS |
| 21:59 UTC | 22:45 UTC | Severe Thunderstorm Warning | CHS |
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 12:21 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.
Charleston AFB, SC (KCHS), 12:00Z
3.0 hours before the tornado, 136 km from the path. September 6, 2004.
- Mixed-layer CAPE
- 1111 J/kg
- Mixed-layer CIN
- -15 J/kg
- Surface CAPE
- 495 J/kg
- Mixed-layer LCL
- 595 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 224 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 4.4
- 0-3 km lapse rate
- 5.2 K/km
Charleston AFB, SC (KCHS), 00:00Z
9.0 hours after it, 136 km from the path. September 7, 2004.
- Mixed-layer CAPE
- 1460 J/kg
- Mixed-layer CIN
- -3 J/kg
- Surface CAPE
- 960 J/kg
- Mixed-layer LCL
- 474 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 205 m²/s²
- 0-3 km storm-relative helicity
- 253 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 6.5
- 0-3 km lapse rate
- 5.0 K/km
This ground now
The live radar over the trackEvery 2004 tornado in GeorgiaEvery tornado in Georgia since 1950Warnings in force in Georgia nowThe forecast where you are
The other tornadoes of September 6, 2004
13 more were confirmed in the United States that day.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| September 6 | 2:15 AM EDT | F0 | Saint Johns, FL | 1.0 | 75 | $60,000 | ||
| September 6 | 3:30 AM EDT | F0 | Bryan, GA | 0.5 | 30 | |||
| September 6 | 4:20 AM EDT | F0 | Bulloch, GA | 5.0 | 60 | |||
| September 6 | 9:00 AM EDT | F1 | Liberty, GA | 8.5 | 75 | |||
| September 6 | 10:32 AM EDT | F0 | Polk, FL | 0.3 | 30 | |||
| September 6 | 1:05 PM EDT | F0 | Colleton, SC | 0.5 | 40 | |||
| September 6 | 2:40 PM EDT | F1 | Beaufort, SC | 1.0 | 75 | |||
| September 6 | 2:55 PM EDT | F1 | Jasper, SC | 2.0 | 100 | 1 | ||
| September 6 | 4:40 PM EDT | F0 | Palm Beach, FL | 0.2 | 10 | |||
| September 6 | 6:45 PM EDT | F1 | Clay, FL | 0.5 | 75 | |||
| September 6 | 7:10 PM EDT | F0 | Saint Johns, FL | 1.0 | 75 | $10,000 | ||
| September 6 | 7:20 PM EDT | F0 | Saint Johns, FL | 1.0 | 75 | $20,000 | ||
| September 6 | 10:00 PM EDT | F0 | Pasco, FL | 0.2 | 30 |
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.