Tornadoes · United States · Georgia · 1998

F3 tornado, Pembroke to Rincon, Georgia, April 9, 1998

From Pembroke to Rincon, this F3 tornado ran 8.0 miles across Bryan and Effingham counties on April 9, 1998, touching down at 5:45 AM EDT and reaching 440 yards wide. It killed 2 people and injured 17, and did $2.7 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.

  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 mph

    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 mphthis tornado

    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
F3
Date
April 9, 1998
Touchdown
5:45 AM EDT (09:45 UTC)
Path length
8.0 miles (12.9 km)
Path width
440 yards (402 m)
Deaths
2
Injuries
17
Property damage
$2.7 million
Counties
Bryan and Effingham counties
Touchdown point
32.170, -81.580
Lift-off point
32.230, -81.300
Record number
818

What the Weather Service recorded

Tornado first touched down just northeast of Pembroke and then crossed I-16 at the Olive Branch Road overpass (about 2 miles west of exit 29) then continued northeast. Significant damage occurred in the Olive Branch Rd. area and also just north of Blitchton, where a 38 year-old female and a 41 year old male were killed along with 15 injured. There were seventy-four (74) homes and other buildiings damaged, with fourteen of those destroyed (6 mobile homes, two frame houses, two brick homes, and four other buildings. Numerous trees were uprooted or snapped off 10 to 15 feet above the ground.

The Bryan County tornado crossed the county line and weakened as it moved into a less populated area. Once the tornado moved east of GA State Road 17, it lifted. There were no further reports of damage or touchdowns from the parent supercell until the F1 touchdown reported just west of Hardeeville, S.C., which is approximately 12 miles from the last report of damage in Effingham County, Georgia. There were 40 homes damaged along GA 17, about 5 miles south of Guyton. Six of these were mobile homes that were destroyed. Numerous trees were uprooted or snapped off 10 to 15 feet above the ground.

The deaths

2 direct deaths are recorded for this tornado, each with what Storm Data knows of it.

AgeSexWhereKind
41MMobile/Trailer HomeDirect
38FMobile/Trailer HomeDirect

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

The warnings

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down. One was issued for the county at another hour that day.

Issued (UTC)ExpiredProductOffice
09:51 UTC10:25 UTCTornado WarningCHS
10:56 UTC11:30 UTCSevere Thunderstorm WarningCHS

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 11:00 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), 00:00Z

9.8 hours before the tornado, 156 km from the path. April 9, 1998.

Skew-T log-pSkew-T log-p diagram, Charleston AFB, SC at 00:00Z on 1998-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 0 joules per kilogram, CIN -26197, lifted condensation level 942 meters above ground. Wind barbs in knots down the right edge.LCL10008507005003002001001 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, Charleston AFB, SC at 00:00Z on 1998-04-09The 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 176 square meters per square second, 0 to 6 km bulk shear 62 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
0 J/kg
Mixed-layer CIN
-26197 J/kg
Surface CAPE
16 J/kg
Mixed-layer LCL
942 m above ground
0-6 km bulk shear
62 kt
0-1 km bulk shear
13 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
320 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
4.1 K/km

Open this sounding in Storm Lab

Charleston AFB, SC (KCHS), 12:00Z

2.2 hours after it, 156 km from the path. April 9, 1998.

Skew-T log-pSkew-T log-p diagram, Charleston AFB, SC at 12:00Z on 1998-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 720 joules per kilogram, CIN -13, lifted condensation level 536 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, Charleston AFB, SC at 12:00Z on 1998-04-09The 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 292 square meters per square second, 0 to 6 km bulk shear 80 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
720 J/kg
Mixed-layer CIN
-13 J/kg
Surface CAPE
492 J/kg
Mixed-layer LCL
536 m above ground
0-6 km bulk shear
80 kt
0-1 km bulk shear
33 kt
0-1 km storm-relative helicity
292 m²/s²
0-3 km storm-relative helicity
299 m²/s²
Significant tornado parameter
1.4
Supercell composite
6.1
0-3 km lapse rate
4.9 K/km

Open this sounding in Storm Lab

The surface observations

Savannah - Hilton Head (SAV), 24 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
07:45 UTC69.869.8170° 11 kt1003.7-RA
07:53 UTC6868160° 13 kt1002.7-RA
08:02 UTC6868170° 11 kt191002.7-TSRA BR
08:53 UTC6969180° 13 kt1001.7-TSRA BR
09:03 UTC69.869.8190° 10 kt1002.4TS BR
09:11 UTC69.869.8170° 11 kt1001-TSRA BR
09:20 UTC69.869.8170° 10 kt1001.4-TSRA BR
09:28 UTC69.869.8170° 9 kt181001.7-RA BR
09:36 UTC69.869.8180° 9 kt181001.4TS BR
09:53 UTC6969180° 10 kt161001.4-TSRA BR
10:26 UTC69.869.8200° 9 kt1001.7-RA BR
10:34 UTC69.869.8200° 9 kt151001.7BR
10:53 UTC7170220° 8 kt1002+TSRA BR
10:57 UTC71.669.8200° 7 kt1002+TSRA BR
11:05 UTC69.869.8300° 6 kt1002.7+TSRA BR
11:19 UTC69.869.8260° 7 kt151002.4-TSRA BR
11:23 UTC71.671.6280° 8 kt1002.4TSRA BR
11:31 UTC71.669.8 4 kt1002.4-TSRA BR
11:42 UTC71.669.8 5 kt1002.4-RA BR

From the Iowa Environmental Mesonet's archive of airport observations.

The radar

The Charleston,SC radar (KCLX), 63 km away, was scanning. The volume nearest the touchdown began at 09:47 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 1998 tornado in GeorgiaEvery tornado in Georgia since 1950Warnings in force in Georgia nowThe forecast where you are

The other tornadoes of April 9, 1998

8 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
April 96:22 AM EDTF1Jasper, SC1.0150$50,000
April 96:35 AM EDTF2Long, GA24.5400431$38 million
April 91:45 PM EDTF0Summit, OH0.330$2,000
April 91:45 PM EDTF0Lorain, OH0.130
April 92:30 PM EDTF0Portage, OH0.130
April 92:30 PM EDTF1Beaver, PA0.250$10,000
April 93:28 PM EDTF0Trumbull, OH0.130
April 94:00 PM EDTF0City of Chesapeake, VA5.050$30,000

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.