Tornadoes · United States · North Carolina · 1998
F0 tornado, Holly Spgs to Raleigh, North Carolina, March 20, 1998
From Holly Spgs to Raleigh, this F0 tornado ran 0.1 miles across Wake County on March 20, 1998, touching down at 6:15 PM EST and reaching 30 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 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
- March 20, 1998
- Touchdown
- 6:15 PM EST (23:15 UTC)
- Path length
- 0.1 miles (0.2 km)
- Path width
- 30 yards (27 m)
- Deaths
- 0
- Injuries
- 0
- County
- Wake County
- Touchdown point
- 35.630, -78.850
- Lift-off point
- 35.630, -78.850
- Record number
- 880
What the Weather Service recorded
A home video of this storm showed a wall cloud with several small vortices. One of these touched down very briefly and damaged the roof of one home. The adjacent homes, and there were many, were untouched. The insulation from the home was then spread into adjacent trees.
The storm that hit Garner produced another tornado 6 miles to the northeast on the east side of Raleigh. Damage began just off US64 at Wake Medical Center and the Tower Shopping Center. Cars were overturned, trees were damaged, and a steel-beamed billboard was twisted. The tornado then crossed the highway where it lifted the roof off the business office of a tree nursey, damaged two sheds, and destroyed 5 greenhouses. Insulation and debris was strewn up in the trees well away from the path.
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) | Expired | Product | Office |
|---|---|---|---|
| 23:00 UTC | 23:35 UTC | Severe Thunderstorm Warning | RAH |
| 23:26 UTC | 00:00 UTC | Tornado Warning | RAH |
| 00:05 UTC | 00:35 UTC | Severe Thunderstorm Warning | RAH |
| 01:54 UTC | 02:30 UTC | Tornado Warning | RAH |
| 02:52 UTC | 03:10 UTC | Severe Thunderstorm Warning | RAH |
| 02:52 UTC | 03:10 UTC | Severe Thunderstorm Warning | RAH |
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 11:01 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.
Greensboro/Hi Pt, NC (KGSO), 00:00Z
0.7 hours after it, 107 km from the path. March 21, 1998.
- Mixed-layer CAPE
- 486 J/kg
- Mixed-layer CIN
- -41 J/kg
- Surface CAPE
- 249 J/kg
- Mixed-layer LCL
- 840 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.2
- 0-3 km lapse rate
- 5.5 K/km
The surface observations
Raleigh / Durham (RDU), 30 km from the path, in the two hours either side.
| Time (UTC) | Temp (°F) | Dew point (°F) | Wind | Gust (kt) | Pressure (mb) | Weather |
|---|---|---|---|---|---|---|
| 21:51 UTC | 69 | 61 | 150° 12 kt | 17 | 998 | |
| 22:51 UTC | 67 | 61 | 140° 12 kt | 996.6 | -RA | |
| 23:15 UTC | 66.2 | 60.8 | 140° 11 kt | 996.3 | ||
| 23:35 UTC | 64.4 | 62.6 | 150° 11 kt | 997 | ||
| 23:51 UTC | 65 | 60 | 150° 6 kt | 997 | -RA | |
| 00:10 UTC | 64.4 | 60.8 | 130° 6 kt | 997 | ||
| 00:41 UTC | 64.4 | 60.8 | 140° 8 kt | 996.3 | ||
| 00:51 UTC | 64 | 61 | 130° 8 kt | 995.9 | ||
| 01:05 UTC | 64.4 | 60.8 | 150° 10 kt | 995.6 | ||
| 01:33 UTC | 64.4 | 60.8 | 160° 13 kt | 995.3 |
From the Iowa Environmental Mesonet's archive of airport observations.
This ground now
The live radar over the trackEvery 1998 tornado in North CarolinaEvery tornado in North Carolina since 1950Warnings in force in North Carolina nowThe forecast where you are
The other tornadoes of March 20, 1998
11 more were confirmed in the United States that day.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| March 20 | 6:25 AM EST | F3 | Hall, GA | 4.0 | 100 | 12 | 171 | $20 million |
| March 20 | 2:42 PM EST | F0 | Mecklenburg, NC | 0.1 | 30 | |||
| March 20 | 3:14 PM EST | F1 | Stokes, NC | 1.5 | 30 | 3 | $100,000 | |
| March 20 | 3:25 PM EST | F3 | Rockingham, NC | 12.0 | 300 | 2 | 27 | $34 million |
| March 20 | 3:56 PM EST | F1 | Henry, VA | 13.0 | 150 | $1.0 million | ||
| March 20 | 6:30 PM EST | F2 | Durham, NC | 2.5 | 100 | 1 | $600,000 | |
| March 20 | 6:40 PM EST | F2 | Wake, NC | 1.5 | 100 | 2 | $650,000 | |
| March 20 | 6:45 PM EST | F0 | Wake, NC | 0.2 | 30 | $10,000 | ||
| March 20 | 6:55 PM EST | F2 | Granville, NC | 1.5 | 100 | $100,000 | ||
| March 20 | 7:35 PM EST | F1 | Franklin, NC | 0.1 | 50 | $50,000 | ||
| March 20 | 8:45 PM EST | F1 | Robeson, NC | 0.5 | 30 | 1 | $20,000 |
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.