Tornadoes · United States · Kansas · 1984

F0 tornado, Cowley County, Kansas, June 8, 1984

This F0 tornado ran 0.1 miles across Cowley County on June 8, 1984, touching down at 8:28 PM CDT and reaching 10 yards wide. It killed nobody, and did under $50 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 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
June 8, 1984
Touchdown
8:28 PM CDT (01:28 UTC)
Path length
0.1 miles (0.2 km)
Path width
10 yards (9 m)
Deaths
0
Injuries
0
Property damage
under $50
County
Cowley County
Touchdown point
37.250, -97.080
Record number
531

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.

Ok Cty/Will Rgrs, OK (KOKC), 00:00Z

1.5 hours before the tornado, 211 km from the path. June 9, 1984.

Skew-T log-pSkew-T log-p diagram, Ok Cty/Will Rgrs, OK at 00:00Z on 1984-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 3212 joules per kilogram, CIN -17, lifted condensation level 1161 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, Ok Cty/Will Rgrs, OK at 00:00Z on 1984-06-09The 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 156 square meters per square second, 0 to 6 km bulk shear 32 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
3212 J/kg
Mixed-layer CIN
-17 J/kg
Surface CAPE
5178 J/kg
Mixed-layer LCL
1161 m above ground
0-6 km bulk shear
32 kt
0-1 km bulk shear
23 kt
0-1 km storm-relative helicity
156 m²/s²
0-3 km storm-relative helicity
326 m²/s²
Significant tornado parameter
2.9
Supercell composite
25.3
0-3 km lapse rate
6.8 K/km

Open this sounding in Storm Lab

Ok Cty/Will Rgrs, OK (KOKC), 12:00Z

10.5 hours after it, 211 km from the path. June 9, 1984.

Skew-T log-pSkew-T log-p diagram, Ok Cty/Will Rgrs, OK at 12:00Z on 1984-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1587 joules per kilogram, CIN -120, lifted condensation level 587 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, Ok Cty/Will Rgrs, OK at 12:00Z on 1984-06-09The 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 253 square meters per square second, 0 to 6 km bulk shear 33 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
1587 J/kg
Mixed-layer CIN
-120 J/kg
Surface CAPE
417 J/kg
Mixed-layer LCL
587 m above ground
0-6 km bulk shear
33 kt
0-1 km bulk shear
31 kt
0-1 km storm-relative helicity
253 m²/s²
0-3 km storm-relative helicity
295 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.5
0-3 km lapse rate
4.4 K/km

Open this sounding in Storm Lab

The surface observations

Mcconnell_afb (IAB), 45 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
00:00 UTC716850° 4 kt1006.8TSRA FG
01:00 UTC7268110° 7 kt1005.8TSRA
02:00 UTC6763170° 15 kt1005.1TSRA
03:00 UTC6662160° 10 kt1006.1TSRA

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

This ground now

The live radar over the trackEvery 1984 tornado in KansasEvery tornado in Kansas since 1950Warnings in force in Kansas nowThe forecast where you are

The other tornadoes of June 8, 1984

16 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
June 81:10 AM CDTF2Dane, WI18.050$500,000 to $5 million
June 81:25 AM CDTF2Columbia, WI16.050$50,000 to $500,000
June 81:41 AM CDTF3Columbia, WI29.02001$500,000 to $5 million
June 81:49 AM CDTF1Columbia, WI9.030$50,000 to $500,000
June 82:17 AM CDTF2Dodge, WI11.0501$500,000 to $5 million
June 83:27 PM MDTF1Grand, CO0.350$500 to $5,000
June 85:50 PM CDTF1Nodaway, MO0.550
June 86:02 PM CDTF1Nodaway, MO1.050$5,000 to $50,000
June 87:00 PM CDTF1Alfalfa, OK0.117$5,000 to $50,000
June 87:05 PM CDTF0Grant, OK0.117
June 87:15 PM CDTF0Audrain, MO0.350
June 87:30 PM CDTF1Audrain, MO1.077$50,000 to $500,000
June 87:25 PM MDTF0Sherman, KS0.110$500 to $5,000
June 88:26 PM CDTF0Cowley, KS0.110under $50
June 88:30 PM CDTF0Cowley, KS0.110under $50
June 89:46 PM CDTF0Cowley, KS1.050under $50

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.