Tornadoes · United States · Texas · 1975

F0 tornado, Travis County, Texas, May 5, 1975

This F0 tornado ran 3.0 miles across Travis County on May 5, 1975, touching down at 2:25 PM CDT and reaching 400 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
May 5, 1975
Touchdown
2:25 PM CDT (19:25 UTC)
Path length
3.0 miles (4.8 km)
Path width
400 yards (366 m)
Deaths
0
Injuries
0
County
Travis County
Touchdown point
30.180, -97.850
Record number
300

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.

Victoria Regiona, TX (KVCT), 12:00Z

7.4 hours before the tornado, 174 km from the path. May 5, 1975.

Skew-T log-pSkew-T log-p diagram, Victoria Regiona, TX at 12:00Z on 1975-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 2106 joules per kilogram, CIN -102, lifted condensation level 685 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, Victoria Regiona, TX at 12:00Z on 1975-05-05The 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 192 square meters per square second, 0 to 6 km bulk shear 50 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
2106 J/kg
Mixed-layer CIN
-102 J/kg
Surface CAPE
2146 J/kg
Mixed-layer LCL
685 m above ground
0-6 km bulk shear
50 kt
0-1 km bulk shear
21 kt
0-1 km storm-relative helicity
192 m²/s²
0-3 km storm-relative helicity
303 m²/s²
Significant tornado parameter
2.9
Supercell composite
19.7
0-3 km lapse rate
3.6 K/km

Open this sounding in Storm Lab

Victoria Regiona, TX (KVCT), 00:00Z

4.6 hours after it, 174 km from the path. May 6, 1975.

Skew-T log-pSkew-T log-p diagram, Victoria Regiona, TX at 00:00Z on 1975-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 2633 joules per kilogram, CIN -10, lifted condensation level 647 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, Victoria Regiona, TX at 00:00Z on 1975-05-06The 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 86 square meters per square second, 0 to 6 km bulk shear 51 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
2633 J/kg
Mixed-layer CIN
-10 J/kg
Surface CAPE
2399 J/kg
Mixed-layer LCL
647 m above ground
0-6 km bulk shear
51 kt
0-1 km bulk shear
10 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
1.5
Supercell composite
5.3
0-3 km lapse rate
5.4 K/km

Open this sounding in Storm Lab

This ground now

The live radar over the trackEvery 1975 tornado in TexasEvery tornado in Texas since 1950Warnings in force in Texas nowThe forecast where you are

The other tornadoes of May 5, 1975

1 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 56:30 PM MDTF1Pennington, SD27.420$5,000 to $50,000

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.