Tornadoes · United States · Virginia · 1999

F1 tornado, Ararat, Virginia, September 29, 1999

This F1 tornado ran 0.2 miles across Patrick County on September 29, 1999, touching down at 6:31 PM EDT and reaching 50 yards wide. It killed nobody, and did $60,000 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 mphthis tornado

    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 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
F1
Date
September 29, 1999
Touchdown
6:31 PM EDT (22:31 UTC)
Path length
0.2 miles (0.3 km)
Path width
50 yards (46 m)
Deaths
0
Injuries
0
Property damage
$60,000
County
Patrick County
Touchdown point
36.570, -80.500
Lift-off point
36.570, -80.500
Record number
978

What the Weather Service recorded

Thunderstorms on the 29th produced damaging winds, flash flooding, and two tornadoes.Thunderstorm winds downed 10 trees at the intersection of State Route 653 and U.S Route 58, eleven miles southeast of Hillsville, downed several trees 2.5 miles south of Ararat, downed several trees and broke off large tree limbs from 4 miles east-northeast of Ararat to 4.5 miles east-northeast of Ararat, downed large trees in Halifax, including a tree that closed Route 501 southbound for two hours, and downed trees and damaged a mobile home 4 miles south of New Canton.Heavy rain flooded Route 707, five miles southeast of Chatham, 6 creeks in western Campbell County, closing several roads, flooded and closed Route 460 one mile north of Concord, stranding a motorist, numerous small streams and roads in Amherst County, several roads in the City of Lynchburg, forcing them to be closed, flooded Mill Stream Bridge in Gretna, and several streams in western Appomattox County, closing several roads.A thunderstorm spawned two tornadoes in Patrick County, during the early evening of the 29th.The first tornado formed 2.2 miles south-southeast of Ararat at 1731 EST. It was on the ground for about a quarter of a mile before dissipating at near 1732 EST. The path was 50 yards wide. This tornado tore off part of the roof of a tobacco curing shelter, uprooted several trees, and broke off large tree limbs. One large tree fell on and destroyed a mobile home. Maximum wind speeds were estimated at about 80 miles an hour.The second tornado formed 2.5 miles southeast of Ararat at 1734 EST, and travelled northeast for nearly a mile, to 2.5 miles east-southeast of Ararat before dissipating at 1736. This tornado damaged the roof of a house, tore shingles and a gutter off of a church, damaged out buildings and a barn, uprooted several trees, broke off large tree limbs, and damaged some tobacco crops. This tornado was 50 yards wide and maximum winds were also estimated at about 80 miles an hour.

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
22:32 UTC23:35 UTCSevere Thunderstorm WarningRNK
23:01 UTC00:00 UTCTornado WarningRNK

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 General Thunderstorms Risk. The outlook in force was issued at 19:58 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), 12:00Z

10.5 hours before the tornado, 77 km from the path. September 29, 1999.

Skew-T log-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 1999-09-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 196 joules per kilogram, CIN -49, lifted condensation level 508 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 12:00Z on 1999-09-29The 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 106 square meters per square second, 0 to 6 km bulk shear 24 knots.193958Sfc1 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
196 J/kg
Mixed-layer CIN
-49 J/kg
Surface CAPE
183 J/kg
Mixed-layer LCL
508 m above ground
0-6 km bulk shear
24 kt
0-1 km bulk shear
14 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
4.5 K/km

Open this sounding in Storm Lab

Greensboro/Hi Pt, NC (KGSO), 00:00Z

1.5 hours after it, 77 km from the path. September 30, 1999.

Skew-T log-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 00:00Z on 1999-09-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 334 joules per kilogram, CIN -8, lifted condensation level 583 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 1999-09-30The 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 182 square meters per square second, 0 to 6 km bulk shear 48 knots.19395878Sfc1 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
334 J/kg
Mixed-layer CIN
-8 J/kg
Surface CAPE
1199 J/kg
Mixed-layer LCL
583 m above ground
0-6 km bulk shear
48 kt
0-1 km bulk shear
18 kt
0-1 km storm-relative helicity
182 m²/s²
0-3 km storm-relative helicity
363 m²/s²
Significant tornado parameter
0.3
Supercell composite
4.9
0-3 km lapse rate
5.5 K/km

Open this sounding in Storm Lab

The surface observations

Mount_airy/Surry_county_aprt (MWK), 13 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
20:40 UTC71.671.6160° 3 kt1011.5
23:00 UTC71.671.6160° 8 kt1009.8BR
23:20 UTC71.669.8170° 8 kt1009.8
23:40 UTC69.869.8170° 5 kt1009.5
00:00 UTC69.869.8160° 6 kt1009.1
00:20 UTC69.869.8160° 6 kt1009.1

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

The radar

The Roanoke radar (KFCX), 54 km away, was scanning. The volume nearest the touchdown began at 22:33 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 1999 tornado in VirginiaEvery tornado in Virginia since 1950Warnings in force in Virginia nowThe forecast where you are

The other tornadoes of September 29, 1999

6 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
September 296:00 PM EDTF2Stanly, NC0.150$30,000
September 296:20 PM EDTF1Surry, NC2.040$150,000
September 296:34 PM EDTF1Patrick, VA1.050$130,000
September 297:00 PM EDTF2Stanly, NC6.0100$3.0 million
September 298:10 PM EDTF0Montgomery, NC0.250
September 298:40 PM EDTF1Darlington, SC15.0206$240,000

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.