Tornadoes · United States · Illinois · 1967

F1 tornado, Will County, Illinois, June 10, 1967

This F1 tornado ran 0.2 miles across Will County on June 10, 1967, touching down at 6:30 PM GMT-5 and reaching 100 yards wide. It killed nobody, and did $5,000 to $50,000 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 10, 1967
Touchdown
6:30 PM GMT-5 (23:30 UTC)
Path length
0.2 miles (0.3 km)
Path width
100 yards (91 m)
Deaths
0
Injuries
0
Property damage
$5,000 to $50,000
County
Will County
Touchdown point
41.630, -88.050
Record number
424

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.

Peoria Regional, IL (KPIA), 12:00Z

11.5 hours before the tornado, 168 km from the path. June 10, 1967.

Skew-T log-pSkew-T log-p diagram, Peoria Regional, IL at 12:00Z on 1967-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1224 joules per kilogram, CIN -33, lifted condensation level 759 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, Peoria Regional, IL at 12:00Z on 1967-06-10The 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 -16 square meters per square second, 0 to 6 km bulk shear 14 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
1224 J/kg
Mixed-layer CIN
-33 J/kg
Surface CAPE
716 J/kg
Mixed-layer LCL
759 m above ground
0-6 km bulk shear
14 kt
0-1 km bulk shear
26 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.9 K/km

Open this sounding in Storm Lab

Peoria Regional, IL (KPIA), 00:00Z

0.5 hours after it, 168 km from the path. June 11, 1967.

Skew-T log-pSkew-T log-p diagram, Peoria Regional, IL at 00:00Z on 1967-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 20 joules per kilogram, CIN -143, lifted condensation level 820 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, Peoria Regional, IL at 00:00Z on 1967-06-11The 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 143 square meters per square second, 0 to 6 km bulk shear 39 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
20 J/kg
Mixed-layer CIN
-143 J/kg
Surface CAPE
41 J/kg
Mixed-layer LCL
820 m above ground
0-6 km bulk shear
39 kt
0-1 km bulk shear
24 kt
0-1 km storm-relative helicity
143 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.3 K/km

Open this sounding in Storm Lab

This ground now

The live radar over the trackEvery 1967 tornado in IllinoisEvery tornado in Illinois since 1950Warnings in force in Illinois nowThe forecast where you are

The other tornadoes of June 10, 1967

24 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
June 101:10 AM GMT-5F2Ellis, OK0.110$500 to $5,000
June 103:00 AM GMT-5F1McDonald, MO1.050$500 to $5,000
June 1012:00 PM GMT-5F0Lafayette, MO0.217under $50
June 103:05 PM GMT-5F1Walworth, WI0.110$50,000 to $500,000
June 104:30 PM GMT-5F1Ellis, OK3.8100$500 to $5,000
June 105:30 PM GMT-5F0Finney, KS1.0440$5,000 to $50,000
June 105:30 PM GMT-5F0Ellis, OK0.110
June 106:00 PM GMT-5F2Jefferson, MO0.217$5,000 to $50,000
June 106:04 PM GMT-5F4Custer, OK8.730041$50,000 to $500,000
June 106:09 PM GMT-5F0Custer, OK0.110
June 105:15 PM GMT-6F2Baca, CO14.21004$50,000 to $500,000
June 106:50 PM GMT-5F0Ford, KS0.110
June 106:55 PM GMT-5F0Ford, KS0.110
June 107:30 PM GMT-5F1Custer, OK0.110$50 to $500
June 107:35 PM GMT-5F1Ford, KS0.110$50,000 to $500,000
June 108:48 PM GMT-5F0Pawnee, KS0.110
June 109:30 PM GMT-5F2Blaine, OK0.310$50,000 to $500,000
June 109:40 PM GMT-5F0Finney, KS0.110
June 109:45 PM GMT-5F4Blaine, OK0.110$500,000 to $5 million
June 1010:00 PM GMT-5F0Garfield, OK0.110
June 1010:30 PM GMT-5F0Custer, OK0.110
June 1010:35 PM GMT-5F0Canadian, OK16.910$500,000 to $5 million
June 1010:35 PM GMT-5F0Oklahoma, OK0.110$5,000 to $50,000
June 1011:00 PM GMT-5F3Kingfisher, OK16.7101$500,000 to $5 million

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.