Tornadoes · United States · Virginia · 2003

F1 tornado, Amelia, Virginia, May 9, 2003

This F1 tornado ran 6.0 miles across Amelia County on May 9, 2003, touching down at 3:35 PM EDT and reaching 200 yards wide. It killed nobody, and did $50,000 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
May 9, 2003
Touchdown
3:35 PM EDT (19:35 UTC)
Path length
6.0 miles (9.7 km)
Path width
200 yards (183 m)
Deaths
0
Injuries
0
Property damage
$50,000
County
Amelia County
Touchdown point
37.330, -77.980
Lift-off point
37.300, -77.950
Record number
1150

What the Weather Service recorded

Widespread major damage to trees and power lines, along with some structural damage by F1 tornado in Amelia county. One farm near the end of the tornado path suffered major damage to several barns and outbuildings.

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

The warnings

26 minutes of warning. NWS AKQ issued a tornado warning for this county at 19:09 UTC, 26 minutes before the tornado touched down, in force until 19:40 UTC.

Issued (UTC)ExpiredProductOffice
19:09 UTC19:40 UTCTornado WarningAKQ
19:37 UTC20:15 UTCTornado WarningAKQ

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 06:12 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.

Roanoke, VA (KRNK), 12:00Z

7.6 hours before the tornado, 136 km from the path. May 9, 2003.

Skew-T log-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2003-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 59 joules per kilogram, CIN -186, lifted condensation level 982 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 2003-05-09The 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 153 square meters per square second, 0 to 6 km bulk shear 47 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
59 J/kg
Mixed-layer CIN
-186 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
982 m above ground
0-6 km bulk shear
47 kt
0-1 km bulk shear
23 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
199 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
3.2 K/km

Open this sounding in Storm Lab

Roanoke, VA (KRNK), 00:00Z

4.4 hours after it, 136 km from the path. May 10, 2003.

Skew-T log-pSkew-T log-p diagram, Roanoke, VA at 00:00Z on 2003-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1541 joules per kilogram, CIN -16, lifted condensation level 1135 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 00:00Z on 2003-05-10The 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 90 square meters per square second, 0 to 6 km bulk shear 42 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
1541 J/kg
Mixed-layer CIN
-16 J/kg
Surface CAPE
1931 J/kg
Mixed-layer LCL
1135 m above ground
0-6 km bulk shear
42 kt
0-1 km bulk shear
16 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.3
0-3 km lapse rate
6.5 K/km

Open this sounding in Storm Lab

The surface observations

Chesterfield (FCI), 40 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
17:54 UTC7568 3 kt1012.9
18:54 UTC786840° 9 kt1013.2
19:30 UTC73.466.240° 10 kt1013.2TS
19:54 UTC7168 6 kt1012.9-TSRA BR
20:17 UTC71.668140° 12 kt1010.5-TSRA
20:43 UTC71.668220° 7 kt181010.8BR
20:54 UTC7168200° 6 kt1010.5BR

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

The radar

The Norfolk radar (KAKQ), 93 km away, was scanning. The volume nearest the touchdown began at 19:34 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 2003 tornado in VirginiaEvery tornado in Virginia since 1950Warnings in force in Virginia nowThe forecast where you are

The other tornadoes of May 9, 2003

30 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 91:55 PM EDTF0Augusta, VA5.0100
May 92:20 PM EDTF0Albemarle, VA15.0100$10,000
May 94:35 PM EDTF0Sussex, VA8.0100$10,000
May 94:50 PM EDTF0Southampton, VA4.0100$20,000
May 95:10 PM EDTF0Northampton, NC1.050$10,000
May 95:20 PM EDTF1Hertford, NC7.0100$30,000
May 95:50 PM EDTF0Bertie, NC1.050$10,000
May 96:00 PM EDTF0Chowan, NC1.050$10,000
May 96:08 PM EDTF0Vance, NC5.050$400,000
May 96:30 PM EDTF0Warren, NC0.520
May 96:42 PM EDTF1Washington, NC1.0200$250,000
May 97:20 PM EDTF0Nash, NC0.220
May 97:40 PM CDTF0Sangamon, IL0.320
May 99:10 PM EDTF0Greene, NC0.125
May 98:50 PM CDTF0Caddo, OK0.225
May 99:00 PM CDTF1Caddo, OK1.0100$40,000
May 99:15 PM ESTF1Kosciusko, IN0.125$10,000
May 99:17 PM CDTF0Caddo, OK1.250$10,000
May 99:25 PM CDTF1Cass, MO3.0501$1.0 million
May 99:44 PM CDTF0Cass, MO0.225
May 99:53 PM CDTF1Canadian, OK0.550$3,000
May 910:10 PM CDTF1Oklahoma, OK1.88808$10 million
May 910:15 PM CDTF2Lafayette, MO10.0300$500,000
May 910:18 PM CDTF1Oklahoma, OK0.550$20,000
May 910:29 PM CDTF3Oklahoma, OK17.81,3202$7.0 million
May 910:35 PM CDTF0Saline, MO0.225
May 910:52 PM CDTF0Johnson, MO1.050$1,000
May 911:06 PM CDTF1Oklahoma, OK7.0880$100,000
May 911:49 PM CDTF1Lincoln, OK8.1880$500,000
May 912:25 AM CDTF1Creek, OK2.0300$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.