Tornadoes · United States · South Dakota · 1998

F1 tornado, Hot Spgs, South Dakota, June 24, 1998

This F1 tornado ran 0.3 miles across Fall River County on June 24, 1998, touching down at 5:20 PM MDT and reaching 70 yards wide. It killed nobody and injured 1, and did $170,000 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 24, 1998
Touchdown
5:20 PM MDT (23:20 UTC)
Path length
0.3 miles (0.5 km)
Path width
70 yards (64 m)
Deaths
0
Injuries
1
Property damage
$170,000
County
Fall River County
Touchdown point
43.430, -103.550
Lift-off point
43.430, -103.550
Record number
375

What the Weather Service recorded

As thunderstorms passed over the southwest corner of South Dakota, a brief tornado touched down in the Hot Springs area. One person was injured when the porch of the mobile home he was standing on was destroyed. The mobile home was also destroyed. The roof of a nearby home was torn off by the same tornado as well as damaging two campers and a boat trailer. This same storm later resulted in high winds of 55 to 70 mph which raced across west central South Dakota, east of the Black Hills. A vacant mobile home was destroyed along with a roof being torn off a shed in the Fairburn area.

A roof was blown off a house, and two campers and a boat trailer were damaged. A mobile home was also destroyed with a young man on the porch of the house thrown.

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

The warnings

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.

Issued (UTC)ExpiredProductOffice
23:50 UTC00:35 UTCSevere Thunderstorm WarningUNR

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 General Thunderstorms Risk. The outlook in force was issued at 11:20 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.

Rapid City, SD (KUNR), 12:00Z

11.3 hours before the tornado, 89 km from the path. June 24, 1998.

Skew-T log-pSkew-T log-p diagram, Rapid City, SD at 12:00Z on 1998-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 340 joules per kilogram, CIN -331, lifted condensation level 1992 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, Rapid City, SD at 12:00Z on 1998-06-24The 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 17 square meters per square second, 0 to 6 km bulk shear 31 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
340 J/kg
Mixed-layer CIN
-331 J/kg
Surface CAPE
45 J/kg
Mixed-layer LCL
1992 m above ground
0-6 km bulk shear
31 kt
0-1 km bulk shear
4 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
4.5 K/km

Open this sounding in Storm Lab

Rapid City, SD (KUNR), 00:00Z

0.7 hours after it, 89 km from the path. June 25, 1998.

Skew-T log-pSkew-T log-p diagram, Rapid City, SD at 00:00Z on 1998-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1308 joules per kilogram, CIN -102, lifted condensation level 1446 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, Rapid City, SD at 00:00Z on 1998-06-25The 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 66 square meters per square second, 0 to 6 km bulk shear 24 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
1308 J/kg
Mixed-layer CIN
-102 J/kg
Surface CAPE
1927 J/kg
Mixed-layer LCL
1446 m above ground
0-6 km bulk shear
24 kt
0-1 km bulk shear
12 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
168 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.0
0-3 km lapse rate
7.2 K/km

Open this sounding in Storm Lab

This ground now

The live radar over the trackEvery 1998 tornado in South DakotaEvery tornado in South Dakota since 1950Warnings in force in South Dakota nowThe forecast where you are

The other tornadoes of June 24, 1998

6 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
June 245:25 PM EDTF0Eaton, MI0.130$10,000
June 246:06 PM EDTF1Jackson, MI11.350$500,000
June 247:10 PM CDTF0McIntosh, ND0.230
June 247:23 PM CDTF0Polk, MN0.230
June 248:45 PM EDTF2Ottawa, OH3.510013$20 million
June 249:33 PM CDTF0Olmsted, MN0.250

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.