Tornadoes · United States · Virginia · 2000

F0 tornado, Gladys, Virginia, April 17, 2000

This F0 tornado ran 0.1 miles across Campbell County on April 17, 2000, touching down at 3:52 PM EDT and reaching 40 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.

  1. F040 to 72 mphthis tornado

    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 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
F0
Date
April 17, 2000
Touchdown
3:52 PM EDT (19:52 UTC)
Path length
0.1 miles (0.2 km)
Path width
40 yards (37 m)
Deaths
0
Injuries
0
County
Campbell County
Touchdown point
37.170, -79.080
Lift-off point
37.170, -79.080
Record number
176

What the Weather Service recorded

Thunderstorms during the late morning through evening of the 17th generated a tornado, and produced hail up to one and three quarter inches in diameter, damaging winds, flash flooding, and lightning damage.A tornado briefly touched down in a field in Gladys. No damage was reported.Hail drifts were up to 12 inches deep on the north side of Christiansburg in Montgomery County Lightning struck a house 2 miles north of Altavista, starting a fire that burned to house to the ground. A second house in Brookneal was struck by lightning starting a fire that caused minor damage.Heavy thunderstorm rains caused Little Ivy Creek to flood from 1/2 mile east of Vesta to 5 miles east of Vesta, and caused Poplar Road and Alleghany Springs Road to flood 2 miles west of Shawsville. Heavy rain flooded and closed the following; numerous streets in the City of Roanoke, School Board Road in Rocky Mount, Snake Creek Bridge on Route 58 five miles southeast of Hillsville, and McCoy Road in Christiansburg. Heavy rain flooded Spoon Creek onto Route 58, closing it, 2 miles east of Stuart, caused a mudslide closing Route 759 four miles southwest of Sydnorsville, flooded small streams in Rocky Mt, and flooded and closed roads in southeastern Rockbridge County, and across Charlotte County.Heavy rain caused minor small stream flooding of Broad Run onto Route 618 in several places from 4 miles east of New Castle to 4 miles south of New Castle, and Sinking Creek onto Route 608 in Maybrook.After flooding earlier in the afternoon in Roanoke County and the City of Roanoke, additional heavy rain flooded roads in Vinton and in the City of Roanoke, closing some. Carvins and Masons Creeks flooded in northern Roanoke County, and Tinker Creek and Glade Creek also flooded in Roanoke County and in the City of RoanokeThunderstorm winds on the afternoon of the 17th blew out windows in a house in Penhook and downed trees and power lines in central Wythe County.Thunderstorm winds also damaged houses, cars, mobile homes, barns, and downed trees and power lines in southern Franklin County.

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

The warnings

29 minutes of warning. NWS RNK issued a tornado warning for this county at 19:23 UTC, 29 minutes before the tornado touched down, in force until 20:00 UTC.

Issued (UTC)ExpiredProductOffice
19:02 UTC19:45 UTCSevere Thunderstorm WarningRNK
19:23 UTC20:00 UTCTornado WarningRNK
19:45 UTC20:30 UTCSevere Thunderstorm 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 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.

Roanoke, VA (KRNK), 12:00Z

7.9 hours before the tornado, 37 km from the path. April 17, 2000.

Skew-T log-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2000-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 6 joules per kilogram, CIN -138, lifted condensation level 1222 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, Roanoke, VA at 12:00Z on 2000-04-17The 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 85 square meters per square second, 0 to 6 km bulk shear 25 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
6 J/kg
Mixed-layer CIN
-138 J/kg
Surface CAPE
90 J/kg
Mixed-layer LCL
1222 m above ground
0-6 km bulk shear
25 kt
0-1 km bulk shear
20 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.6 K/km

Open this sounding in Storm Lab

Roanoke, VA (KRNK), 00:00Z

4.1 hours after it, 37 km from the path. April 18, 2000.

Skew-T log-pSkew-T log-p diagram, Roanoke, VA at 00:00Z on 2000-04-18Temperature 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 -25195, lifted condensation level 905 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, Roanoke, VA at 00:00Z on 2000-04-18The 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 -173 square meters per square second, 0 to 6 km bulk shear 38 knots.1939Sfc1 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
-25195 J/kg
Surface CAPE
26 J/kg
Mixed-layer LCL
905 m above ground
0-6 km bulk shear
38 kt
0-1 km bulk shear
21 kt
0-1 km storm-relative helicity
-173 m²/s²
0-3 km storm-relative helicity
-38 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.3 K/km

Open this sounding in Storm Lab

This ground now

The live radar over the trackEvery 2000 tornado in VirginiaEvery tornado in Virginia since 1950Warnings in force in Virginia nowThe forecast where you are

The other tornadoes of April 17, 2000

1 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
April 174:20 PM EDTF1Dinwiddie, VA0.7100$10,000

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.