Tornadoes · United States · Kansas · 1964

F0 tornado, Lyon County, Kansas, April 22, 1964

This F0 tornado ran 0.1 miles across Lyon County on April 22, 1964, touching down at 6:30 PM GMT-6 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 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, estimated from the damage record rather than surveyed
Date
April 22, 1964
Touchdown
6:30 PM GMT-6 (00:30 UTC)
Path length
0.1 miles (0.2 km)
Path width
10 yards (9 m)
Deaths
0
Injuries
0
County
Lyon County
Touchdown point
30.450, -96.120
Record number
143

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.

San Antonio Intl, TX (KSAT), 00:00Z

0.5 hours before the tornado, 242 km from the path. April 23, 1964.

Skew-T log-pSkew-T log-p diagram, San Antonio Intl, TX at 00:00Z on 1964-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1580 joules per kilogram, CIN -53, lifted condensation level 1240 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, San Antonio Intl, TX at 00:00Z on 1964-04-23The 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 79 square meters per square second, 0 to 6 km bulk shear 41 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
1580 J/kg
Mixed-layer CIN
-53 J/kg
Surface CAPE
2021 J/kg
Mixed-layer LCL
1240 m above ground
0-6 km bulk shear
41 kt
0-1 km bulk shear
11 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
0.8
Supercell composite
5.8
0-3 km lapse rate
6.1 K/km

Open this sounding in Storm Lab

San Antonio Intl, TX (KSAT), 12:00Z

11.5 hours after it, 242 km from the path. April 23, 1964.

Skew-T log-pSkew-T log-p diagram, San Antonio Intl, TX at 12:00Z on 1964-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1612 joules per kilogram, CIN -173, lifted condensation level 680 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, San Antonio Intl, TX at 12:00Z on 1964-04-23The 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 157 square meters per square second, 0 to 6 km bulk shear 34 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
1612 J/kg
Mixed-layer CIN
-173 J/kg
Surface CAPE
2102 J/kg
Mixed-layer LCL
680 m above ground
0-6 km bulk shear
34 kt
0-1 km bulk shear
25 kt
0-1 km storm-relative helicity
157 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.1
Supercell composite
5.4
0-3 km lapse rate
4.3 K/km

Open this sounding in Storm Lab

This ground now

The live radar over the trackEvery 1964 tornado in KansasEvery tornado in Kansas since 1950Warnings in force in Kansas nowThe forecast where you are

The other tornadoes of April 22, 1964

25 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
April 222:15 PM GMT-6F1Rooks, KS4.9880$500 to $5,000
April 223:15 PM GMT-6F3Stafford, KS59.78802
April 224:45 PM GMT-6F2Garfield, OK54.07331$50,000 to $500,000
April 225:30 PM GMT-6F1Harvey, KS0.110$500 to $5,000
April 225:30 PM GMT-6F1Garfield, OK28.110$500 to $5,000
April 225:30 PM GMT-6F2McPherson, KS0.110$500 to $5,000
April 225:30 PM GMT-6F1Marion, KS0.1102$500 to $5,000
April 225:45 PM GMT-6F1Noble, OK0.110
April 226:00 PM GMT-6F0Morris, KS0.110
April 226:00 PM GMT-6F0Morris, KS0.110
April 226:00 PM GMT-6F1Morris, KS0.110$500 to $5,000
April 226:00 PM GMT-6F0Chase, KS0.110
April 226:00 PM GMT-6F2Chase, KS0.110$500 to $5,000
April 226:00 PM GMT-6F2Chase, KS0.110
April 226:00 PM GMT-6F1Chase, KS0.110
April 226:30 PM GMT-6F0Lyon, KS0.110
April 226:30 PM GMT-6F0Lyon, KS0.110
April 226:30 PM GMT-6F1Lyon, KS0.110$500 to $5,000
April 226:45 PM GMT-6F1Osage, KS0.110$500 to $5,000
April 227:00 PM GMT-6F0Miami, KS0.110
April 227:00 PM GMT-6F2Franklin, KS0.1101$500 to $5,000
April 227:15 PM GMT-6F1Miami, KS0.110$500 to $5,000
April 227:15 PM GMT-6F1Johnson, KS0.110$500 to $5,000
April 228:00 PM GMT-6F3Delta, TX5.9502$5,000 to $50,000
April 229:40 PM GMT-6F0Bates, MO0.110$500 to $5,000

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.