Tornadoes · United States · North Carolina · 1998

F2 tornado, Garner, North Carolina, March 20, 1998

This F2 tornado ran 1.5 miles across Wake County on March 20, 1998, touching down at 6:40 PM EST and reaching 100 yards wide. It killed nobody and injured 2, and did $650,000 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.

  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 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.

  4. 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.

  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
F2
Date
March 20, 1998
Touchdown
6:40 PM EST (23:40 UTC)
Path length
1.5 miles (2.4 km)
Path width
100 yards (91 m)
Deaths
0
Injuries
2
Property damage
$650,000
County
Wake County
Touchdown point
35.720, -78.620
Lift-off point
35.720, -78.620
Record number
881

What the Weather Service recorded

The tornado remained a funnel as it roared over the Greenbrier Estates just east of US401. Trees were sporadically uprooted and snapped off. Several trees fell on homes and outbuildings. The tornado touched down on Highway 70 at a church. The roof of one section was taken off and the steeple was blown off the chapel. The debris from the church took out windows at a car lot across the street. A block way, the wind removed several large siding sheets from a business.

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

The warnings

14 minutes of warning. NWS RAH issued a tornado warning for this county at 23:26 UTC, 14 minutes before the tornado touched down, in force until 00:00 UTC.

Issued (UTC)ExpiredProductOffice
23:00 UTC23:35 UTCSevere Thunderstorm WarningRAH
23:26 UTC00:00 UTCTornado WarningRAH
00:05 UTC00:35 UTCSevere Thunderstorm WarningRAH
01:54 UTC02:30 UTCTornado WarningRAH
02:52 UTC03:10 UTCSevere Thunderstorm WarningRAH
02:52 UTC03:10 UTCSevere Thunderstorm WarningRAH

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

0.3 hours after it, 122 km from the path. March 21, 1998.

Skew-T log-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 00:00Z on 1998-03-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 486 joules per kilogram, CIN -41, lifted condensation level 840 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, Greensboro/Hi Pt, NC at 00:00Z on 1998-03-21The 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 82 square meters per square second, 0 to 6 km bulk shear 64 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
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

Open this sounding in Storm Lab

The surface observations

Raleigh / Durham (RDU), 24 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
21:51 UTC6961150° 12 kt17998
22:51 UTC6761140° 12 kt996.6-RA
23:15 UTC66.260.8140° 11 kt996.3
23:35 UTC64.462.6150° 11 kt997
23:51 UTC6560150° 6 kt997-RA
00:10 UTC64.460.8130° 6 kt997
00:41 UTC64.460.8140° 8 kt996.3
00:51 UTC6461130° 8 kt995.9
01:05 UTC64.460.8150° 10 kt995.6
01:33 UTC64.460.8160° 13 kt995.3

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.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
March 206:25 AM ESTF3Hall, GA4.010012171$20 million
March 202:42 PM ESTF0Mecklenburg, NC0.130
March 203:14 PM ESTF1Stokes, NC1.5303$100,000
March 203:25 PM ESTF3Rockingham, NC12.0300227$34 million
March 203:56 PM ESTF1Henry, VA13.0150$1.0 million
March 206:15 PM ESTF0Wake, NC0.130
March 206:30 PM ESTF2Durham, NC2.51001$600,000
March 206:45 PM ESTF0Wake, NC0.230$10,000
March 206:55 PM ESTF2Granville, NC1.5100$100,000
March 207:35 PM ESTF1Franklin, NC0.150$50,000
March 208:45 PM ESTF1Robeson, NC0.5301$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.