Tornadoes · United States · Missouri · 1964

F1 tornado, Ray County, Missouri, June 11, 1964

This F1 tornado ran 0.5 miles across Ray County on June 11, 1964, touching down at 3:30 PM GMT-5 and reaching 10 yards wide. It killed nobody, and did $500 to $5,000 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
June 11, 1964
Touchdown
3:30 PM GMT-5 (20:30 UTC)
Path length
0.5 miles (0.8 km)
Path width
10 yards (9 m)
Deaths
0
Injuries
0
Property damage
$500 to $5,000
County
Ray County
Touchdown point
39.430, -94.150
Record number
383

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.

Topeka, KS (KTOP), 12:00Z

8.5 hours before the tornado, 137 km from the path. June 11, 1964.

Skew-T log-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 1964-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 8 joules per kilogram, CIN -457, lifted condensation level 1535 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, Topeka, KS at 12:00Z on 1964-06-11The 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 121 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
8 J/kg
Mixed-layer CIN
-457 J/kg
Surface CAPE
52 J/kg
Mixed-layer LCL
1535 m above ground
0-6 km bulk shear
25 kt
0-1 km bulk shear
31 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
3.9 K/km

Open this sounding in Storm Lab

Topeka, KS (KTOP), 00:00Z

3.5 hours after it, 137 km from the path. June 12, 1964.

Skew-T log-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 1964-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1411 joules per kilogram, CIN -80, lifted condensation level 1249 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, Topeka, KS at 00:00Z on 1964-06-12The 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 91 square meters per square second, 0 to 6 km bulk shear 23 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
1411 J/kg
Mixed-layer CIN
-80 J/kg
Surface CAPE
2571 J/kg
Mixed-layer LCL
1249 m above ground
0-6 km bulk shear
23 kt
0-1 km bulk shear
17 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
176 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.8
0-3 km lapse rate
6.5 K/km

Open this sounding in Storm Lab

This ground now

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

The other tornadoes of June 11, 1964

14 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
June 111:00 PM GMT-5F0Brown, KS0.110
June 1112:20 PM GMT-7F2Quay, NM0.110$500 to $5,000
June 113:30 PM GMT-4F0Hillsborough, FL0.110$500 to $5,000
June 115:30 PM GMT-5F2Curry, NM to TX23.267$5,000 to $50,000
June 118:00 PM GMT-5F0Thayer, NE0.110
June 118:00 PM GMT-5F0Buffalo, NE0.110
June 118:00 PM GMT-5F1Clay, NE0.110
June 118:00 PM GMT-5F0York, NE0.110
June 118:00 PM GMT-5F0Seward, NE0.110
June 118:00 PM GMT-5F1Saline, NE0.110
June 118:00 PM GMT-5F1Fillmore, NE0.110
June 118:30 PM GMT-5F0Barnes, ND2.010$50 to $500
June 118:30 PM GMT-5F2Swisher, TX1.0274$500 to $5,000
June 1111:00 PM GMT-5F1Buena Vista, IA2.0100$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.