Tornadoes · United States · Missouri · 1973

F1 tornado, Dunklin County, Missouri, May 27, 1973

This F1 tornado ran 0.5 miles across Dunklin County on May 27, 1973, touching down at 3:00 AM CDT and reaching 30 yards wide. It killed nobody, and did $50,000 to $500,000 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
May 27, 1973
Touchdown
3:00 AM CDT (08:00 UTC)
Path length
0.5 miles (0.8 km)
Path width
30 yards (27 m)
Deaths
0
Injuries
0
Property damage
$50,000 to $500,000
County
Dunklin County
Touchdown point
36.220, -90.070
Record number
448

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.

Little Rock, AR (KLIT), 00:00Z

8.0 hours before the tornado, 155 km from the path. May 27, 1973.

Skew-T log-pSkew-T log-p diagram, Little Rock, AR at 00:00Z on 1973-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 3967 joules per kilogram, CIN -4, lifted condensation level 993 meters above ground. Wind barbs in knots down the right edge.LCLEL10008507005003002001001 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, Little Rock, AR at 00:00Z on 1973-05-27The 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 219 square meters per square second, 0 to 6 km bulk shear 72 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
3967 J/kg
Mixed-layer CIN
-4 J/kg
Surface CAPE
3967 J/kg
Mixed-layer LCL
993 m above ground
0-6 km bulk shear
72 kt
0-1 km bulk shear
20 kt
0-1 km storm-relative helicity
219 m²/s²
0-3 km storm-relative helicity
339 m²/s²
Significant tornado parameter
8.4
Supercell composite
28.7
0-3 km lapse rate
6.9 K/km

Open this sounding in Storm Lab

Little Rock, AR (KLIT), 12:00Z

4.0 hours after it, 155 km from the path. May 27, 1973.

Skew-T log-pSkew-T log-p diagram, Little Rock, AR at 12:00Z on 1973-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 0 joules per kilogram, CIN -9606, lifted condensation level 1922 meters above ground. Wind barbs in knots down the right edge.LCL10008507005003002001001 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, Little Rock, AR at 12:00Z on 1973-05-27The 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 38 square meters per square second, 0 to 6 km bulk shear 74 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
0 J/kg
Mixed-layer CIN
-9606 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
1922 m above ground
0-6 km bulk shear
74 kt
0-1 km bulk shear
29 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
-127 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
4.6 K/km

Open this sounding in Storm Lab

This ground now

The live radar over the trackEvery 1973 tornado in MissouriEvery tornado in Missouri since 1950Warnings in force in Missouri nowThe forecast where you are

The other tornadoes of May 27, 1973

40 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 273:35 AM CDTF2Shelby, TN2.0100$5,000 to $50,000
May 274:36 AM CDTF1Carroll, TN0.110$500 to $5,000
May 276:00 AM CDTF1Benton, MS5.4100$5,000 to $50,000
May 278:00 AM CDTF1Alcorn, MS2.010$5,000 to $50,000
May 2711:00 AM CDTF2Lincoln, TN0.110$50,000 to $500,000
May 2711:34 AM CDTF1Itawamba, MS0.110$500 to $5,000
May 272:15 PM CDTF3Jones, MS15.0400135$500,000 to $5 million
May 272:30 PM CDTF2Marshall, AL31.55003$50,000 to $500,000
May 272:45 PM CDTF1Hinds, MS0.5150$5,000 to $50,000
May 273:15 PM CDTF2Jackson, AL4.35004$50,000 to $500,000
May 273:50 PM ESTF2Sullivan, IN77.950$50,000 to $500,000
May 273:56 PM CDTF2Jefferson, AL1.05003$50,000 to $500,000
May 274:00 PM CDTF2Clarke, MS3.04401$5,000 to $50,000
May 274:00 PM CDTF2Clarke, MS0.1101$5,000 to $50,000
May 274:00 PM CDTF2Clarke, MS0.1101$5,000 to $50,000
May 274:20 PM CDTF2Lauderdale, MS0.1103$50,000 to $500,000
May 274:35 PM CDTF2St. Clair, AL8.4500$50,000 to $500,000
May 275:30 PM ESTF2Monroe, IN30.050$50,000 to $500,000
May 276:00 PM ESTF2Monroe, IN34.350$50,000 to $500,000
May 276:20 PM CDTF3Greenville, SC to NC60.215040$500,000 to $5 million
May 276:20 PM CDTF4Hale, AL139.18007199$5 million to $50 million
May 277:30 PM EDTF1Alleghany, NC0.1101$50,000 to $500,000
May 277:30 PM EDTF1Rabun, GA0.150$5,000 to $50,000
May 276:30 PM CDTF2Lauderdale, MS0.110$50,000 to $500,000
May 276:50 PM CDTF3Jefferson, AL41.6800144$5 million to $50 million
May 278:00 PM EDTF1Catawba, NC31.3300$50,000 to $500,000
May 278:00 PM EDTF1Walker, GA0.150$500 to $5,000
May 279:10 PM EDTF0Barry, MI0.113under $50
May 279:15 PM EDTF0Rutherford, NC0.110
May 279:30 PM EDTF2Oconee, SC22.52001$50,000 to $500,000
May 279:30 PM EDTF2Abbeville, SC11.81007$50,000 to $500,000
May 2710:00 PM EDTF1Caldwell, NC10.4100$5,000 to $50,000
May 2710:00 PM EDTF2Heard, GA0.8100$500,000 to $5 million
May 2710:30 PM EDTF0Lincoln, NC0.110$5,000 to $50,000
May 274:56 PM HSTF0Hawaii, HI0.110
May 2711:00 PM EDTF2Pickens, SC23.6150$5,000 to $50,000
May 2711:30 PM EDTF2Oconee, SC1.0100$5,000 to $50,000
May 2712:00 AM EDTF1Ionia, MI0.2133$500 to $5,000
May 271:05 AM EDTF1Wilkes, NC32.3103$50,000 to $500,000
May 271:30 AM EDTF3Fulton, GA0.5100$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.