Tornadoes · United States · Texas · 1979

F1 tornado, Taylor County, Texas, May 2, 1979

This F1 tornado ran 2.0 miles across Taylor County on May 2, 1979, touching down at 9:25 PM CDT and reaching 10 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 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 2, 1979
Touchdown
9:25 PM CDT (02:25 UTC)
Path length
2.0 miles (3.2 km)
Path width
10 yards (9 m)
Deaths
0
Injuries
0
County
Taylor County
Touchdown point
32.470, -100.100
Record number
210

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.

Stephenville/Cla, TX (KSEP), 00:00Z

2.4 hours before the tornado, 190 km from the path. May 3, 1979.

Skew-T log-pSkew-T log-p diagram, Stephenville/Cla, TX at 00:00Z on 1979-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 2906 joules per kilogram, CIN -46, lifted condensation level 579 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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, Stephenville/Cla, TX at 00:00Z on 1979-05-03The 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 55 square meters per square second, 0 to 6 km bulk shear 57 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
2906 J/kg
Mixed-layer CIN
-46 J/kg
Surface CAPE
3274 J/kg
Mixed-layer LCL
579 m above ground
0-6 km bulk shear
57 kt
0-1 km bulk shear
6 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.9
Supercell composite
3.2
0-3 km lapse rate
4.6 K/km

Open this sounding in Storm Lab

Stephenville/Cla, TX (KSEP), 12:00Z

9.6 hours after it, 190 km from the path. May 3, 1979.

Skew-T log-pSkew-T log-p diagram, Stephenville/Cla, TX at 12:00Z on 1979-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 2390 joules per kilogram, CIN -112, lifted condensation level 626 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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, Stephenville/Cla, TX at 12:00Z on 1979-05-03The 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 89 square meters per square second, 0 to 6 km bulk shear 43 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
2390 J/kg
Mixed-layer CIN
-112 J/kg
Surface CAPE
2527 J/kg
Mixed-layer LCL
626 m above ground
0-6 km bulk shear
43 kt
0-1 km bulk shear
17 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.0
0-3 km lapse rate
4.4 K/km

Open this sounding in Storm Lab

The surface observations

Dyess Afb/Abilene (DYS), 24 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
01:00 UTC7668120° 7 kt1005.1
02:00 UTC7467110° 10 kt1005.4
02:13 UTC130° 10 kt1005.8
03:00 UTC7368150° 8 kt1006.8TS
03:19 UTC180° 5 kt1007.8
04:00 UTC7368170° 11 kt1007.5

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

This ground now

The live radar over the trackEvery 1979 tornado in TexasEvery tornado in Texas since 1950Warnings in force in Texas nowThe forecast where you are

The other tornadoes of May 2, 1979

8 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 24:50 PM CDTF0Woods, OK0.313
May 25:15 PM CDTF4Major, OK20.6880125$500,000 to $5 million
May 25:17 PM CDTF2Major, OK20.31,760$50,000 to $500,000
May 25:30 PM CDTF0Sumner, KS0.113$5,000 to $50,000
May 26:45 PM CDTF3Garfield, OK8.4120$50,000 to $500,000
May 27:50 PM CDTF2Logan, OK1.040$50,000 to $500,000
May 28:13 PM CDTF1Payne, OK0.313$5,000 to $50,000
May 212:35 AM CDTF1Washington, AR4.750$50,000 to $500,000

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.