Tornadoes · United States · Ohio · 1973

F2 tornado, Ashland and Wayne counties, Ohio, May 10, 1973

This F2 tornado ran 40.4 miles across Ashland and Wayne counties on May 10, 1973, touching down at 6:15 PM EDT and reaching 667 yards wide. It killed nobody and injured 8, 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 mph

    Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

  3. F2113 to 157 mphthis tornado

    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
F2
Date
May 10, 1973
Touchdown
6:15 PM EDT (22:15 UTC)
Path length
40.4 miles (65.0 km)
Path width
667 yards (610 m)
Deaths
0
Injuries
8
Property damage
$50,000 to $500,000
Counties
Ashland and Wayne counties
Touchdown point
41.030, -82.500
Lift-off point
40.950, -81.730
Record number
346

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.

Pittsburgh, PA (KPIT), 12:00Z

10.3 hours before the tornado, 182 km from the path. May 10, 1973.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 1973-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 96 joules per kilogram, CIN -86, lifted condensation level 1271 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, Pittsburgh, PA at 12:00Z on 1973-05-10The 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 57 square meters per square second, 0 to 6 km bulk shear 38 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
96 J/kg
Mixed-layer CIN
-86 J/kg
Surface CAPE
242 J/kg
Mixed-layer LCL
1271 m above ground
0-6 km bulk shear
38 kt
0-1 km bulk shear
22 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
62 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1
0-3 km lapse rate
6.7 K/km

Open this sounding in Storm Lab

Pittsburgh, PA (KPIT), 00:00Z

1.7 hours after it, 182 km from the path. May 11, 1973.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 00:00Z on 1973-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 78 joules per kilogram, CIN -137, lifted condensation level 1339 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, Pittsburgh, PA at 00:00Z on 1973-05-11The 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 92 square meters per square second, 0 to 6 km bulk shear 48 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
78 J/kg
Mixed-layer CIN
-137 J/kg
Surface CAPE
126 J/kg
Mixed-layer LCL
1339 m above ground
0-6 km bulk shear
48 kt
0-1 km bulk shear
16 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
7.1 K/km

Open this sounding in Storm Lab

The surface observations

Mansfield (MFD), 39 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
21:00 UTC6655200° 17 kt221006.1
22:00 UTC6556170° 11 kt1005.8TSRA DZ
23:00 UTC6159180° 10 kt1005.8-TSRA
00:00 UTC6159180° 9 kt1006.4-TSRA

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

This ground now

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

The other tornadoes of May 10, 1973

14 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 1011:45 AM CDTF1Warren, KY0.110$500 to $5,000
May 102:00 PM EDTF2McCreary, KY2.7105$5,000 to $50,000
May 101:45 PM CDTF1Davidson, TN0.110$500 to $5,000
May 102:00 PM ESTF1Allen, IN1.030$5,000 to $50,000
May 102:05 PM ESTF1Allen, IN0.120$5,000 to $50,000
May 102:10 PM ESTF1Allen, IN1.080$50,000 to $500,000
May 102:15 PM CDTF1Putnam, TN0.110$5,000 to $50,000
May 103:30 PM EDTF1Lycoming, PA1.667$50,000 to $500,000
May 105:40 PM EDTF3Seneca, OH50.1276100$500,000 to $5 million
May 105:41 PM EDTF2Wyandot, OH58.226714$5,000 to $50,000
May 106:49 PM EDTF3Champaign, OH89.63008$500 to $5,000
May 108:25 PM EDTF2Holmes, OH6.2171$50,000 to $500,000
May 1010:30 PM EDTF1Washington, PA2.0103$5,000 to $50,000
May 1011:30 PM EDTF1Grainger, TN0.110$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.