Tornadoes · United States · Kentucky · 1998

F0 tornado, Kehoe, Kentucky, May 24, 1998

This F0 tornado ran 2.0 miles across Greenup County on May 24, 1998, touching down at 4:15 PM EDT and reaching 100 yards wide. It killed nobody, and did $10,000 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 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
May 24, 1998
Touchdown
4:15 PM EDT (20:15 UTC)
Path length
2.0 miles (3.2 km)
Path width
100 yards (91 m)
Deaths
0
Injuries
0
Property damage
$10,000
County
Greenup County
Touchdown point
38.500, -83.070
Lift-off point
38.470, -83.030
Record number
231

What the Weather Service recorded

The tornado skipped along the ground. Peak wind gusts were estimated around 70 mph. The path was through sparsely populated wooded countryside. A survey team saw damage to telephone and electrical lines. Numerous trees were fallen, but no structures were affected.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

The warnings

0 minutes of warning. NWS RLX issued a tornado warning for this county at 20:15 UTC, 0 minutes before the tornado touched down, in force until 20:45 UTC.

Issued (UTC)ExpiredProductOffice
19:39 UTC20:30 UTCSevere Thunderstorm WarningRLX
20:15 UTC20:45 UTCTornado WarningRLX
20:53 UTC21:45 UTCSevere Thunderstorm WarningRLX
22:27 UTC23:00 UTCSevere Thunderstorm WarningRLX

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The forecast that day

The Storm Prediction Center had this point in a Slight Risk. The outlook in force was issued at 11:04 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

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.

Cncnati-Daytn, OH (KILN), 12:00Z

8.3 hours before the tornado, 123 km from the path. May 24, 1998.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 1998-05-24Temperature 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 -197, lifted condensation level 638 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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, Cncnati-Daytn, OH at 12:00Z on 1998-05-24The 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 87 square meters per square second, 0 to 6 km bulk shear 53 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
8 J/kg
Mixed-layer CIN
-197 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
638 m above ground
0-6 km bulk shear
53 kt
0-1 km bulk shear
25 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2
0-3 km lapse rate
4.3 K/km

Open this sounding in Storm Lab

Cncnati-Daytn, OH (KILN), 00:00Z

3.7 hours after it, 123 km from the path. May 25, 1998.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 1998-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 2191 joules per kilogram, CIN -7, lifted condensation level 687 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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, Cncnati-Daytn, OH at 00:00Z on 1998-05-25The 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 40 square meters per square second, 0 to 6 km bulk shear 55 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
2191 J/kg
Mixed-layer CIN
-7 J/kg
Surface CAPE
1891 J/kg
Mixed-layer LCL
687 m above ground
0-6 km bulk shear
55 kt
0-1 km bulk shear
21 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
1.1
Supercell composite
4.0
0-3 km lapse rate
5.5 K/km

Open this sounding in Storm Lab

This ground now

The live radar over the trackEvery 1998 tornado in KentuckyEvery tornado in Kentucky since 1950Warnings in force in Kentucky nowThe forecast where you are

The other tornadoes of May 24, 1998

27 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 241:32 PM MDTF0Arapahoe, CO0.130
May 241:46 PM MDTF0Arapahoe, CO2.050$100,000
May 247:30 PM EDTF1Harrison, WV4.01501$600,000
May 246:45 PM CDTF0Alfalfa, OK0.130
May 246:50 PM CDTF0Alfalfa, OK0.130
May 245:55 PM MDTF0Kiowa, CO0.130
May 246:55 PM CDTF1Alfalfa, OK5.0100$3,000
May 247:10 PM CDTF0Harper, KS1.050$30,000
May 247:23 PM CDTF0Grant, OK0.130
May 246:25 PM MDTF0Sherman, KS0.230
May 247:25 PM CDTF0Grant, OK2.550
May 247:30 PM CDTF0Sumner, KS1.050
May 246:35 PM MDTF1Otero, CO1.050$50,000
May 247:39 PM CDTF0Cowley, KS1.050
May 247:39 PM CDTF0Grant, OK0.130
May 247:40 PM CDTF0Grant, OK0.130
May 247:46 PM CDTF0Grant, OK1.0250
May 247:47 PM CDTF0Grant, OK0.8180
May 248:01 PM CDTF0Cowley, KS4.0100
May 248:20 PM CDTF1Grant, OK2.080$10,000
May 248:29 PM CDTF0Grant, OK5.0280$1,000
May 248:35 PM CDTF1Grant, OK1.0200$10,000
May 248:45 PM CDTF0Cowley, KS1.050
May 248:50 PM CDTF1Grant, OK2.0400$10,000
May 248:55 PM CDTF0Kay, OK0.130
May 249:10 PM CDTF3Grant, OK5.31,300$2.0 million
May 2410:30 PM CDTF0Kay, OK0.130

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.