Tornadoes · United States · Nebraska · 1998

F0 tornado, Minden, Nebraska, May 21, 1998

This F0 tornado ran 0.2 miles across Kearney County on May 21, 1998, touching down at 8:35 PM CDT and reaching 30 yards wide. It killed nobody.

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 21, 1998
Touchdown
8:35 PM CDT (01:35 UTC)
Path length
0.2 miles (0.3 km)
Path width
30 yards (27 m)
Deaths
0
Injuries
0
County
Kearney County
Touchdown point
40.450, -99.020
Lift-off point
40.450, -99.020
Record number
1014

What the Weather Service recorded

Two clusters of strong to severe thunderstorms erupted across south-central Nebraska in the evening and early morning hours. The first dumped hail as large as soft balls on Holdrege and the surrounding area. Dozens of cars and trucks were damaged or totaled by the large hail. A fertilizer operation southwest of town sustained major damage to a storage bin as the hail went through the steel roof. Roofs and siding was damaged along with windows broken and blown in. The first round of thunderstorms also spawned two brief tornado touchdowns to the west of Minden. Both were reported by trained spotters in the area. Large hail north of Arapahoe severely damaged the wheat crop in the area.The second round of storms rolled through around midnight CDT with torrential rains and wind driven hail. Damage was generally confined to crops and, in particular, across a part of northern Hamilton county. As many as fifty sections of beans, corn, and alfalfa were damaged by the wind and hail. Nine sections sustained major damage. Throughout the area, widespread one to four inch rains posed problems for low lying areas and waterlogged early season crops.

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

The warnings

5 minutes of warning. NWS GID issued a tornado warning for this county at 01:30 UTC, 5 minutes before the tornado touched down, in force until 02:00 UTC.

Issued (UTC)ExpiredProductOffice
16:03 UTC16:35 UTCSevere Thunderstorm WarningGID
16:38 UTC17:10 UTCSevere Thunderstorm WarningGID
00:40 UTC01:30 UTCTornado WarningGID
01:30 UTC02:00 UTCTornado WarningGID
02:01 UTC02:30 UTCTornado WarningGID
02:32 UTC03:00 UTCSevere Thunderstorm WarningGID
02:42 UTC03:15 UTCTornado WarningGID
03:14 UTC03:45 UTCTornado WarningGID
04:57 UTC05:45 UTCTornado WarningGID
05:48 UTC06:35 UTCSevere Thunderstorm WarningGID

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 10:39 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.

N. Platte/Lee Bi, NE (KLBF), 00:00Z

1.6 hours before the tornado, 153 km from the path. May 22, 1998.

Skew-T log-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 1998-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 685 joules per kilogram, CIN -16, lifted condensation level 548 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, N. Platte/Lee Bi, NE at 00:00Z on 1998-05-22The 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 34 square meters per square second, 0 to 6 km bulk shear 45 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
685 J/kg
Mixed-layer CIN
-16 J/kg
Surface CAPE
1128 J/kg
Mixed-layer LCL
548 m above ground
0-6 km bulk shear
45 kt
0-1 km bulk shear
12 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1
0-3 km lapse rate
5.3 K/km

Open this sounding in Storm Lab

N. Platte/Lee Bi, NE (KLBF), 12:00Z

10.4 hours after it, 153 km from the path. May 22, 1998.

Skew-T log-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 1998-05-22Temperature 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 -70766, lifted condensation level 873 meters above ground. Wind barbs in knots down the right edge.LCL10008507005003002001001 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, N. Platte/Lee Bi, NE at 12:00Z on 1998-05-22The 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 -19 square meters per square second, 0 to 6 km bulk shear 37 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
0 J/kg
Mixed-layer CIN
-70766 J/kg
Surface CAPE
3 J/kg
Mixed-layer LCL
873 m above ground
0-6 km bulk shear
37 kt
0-1 km bulk shear
8 kt
0-1 km storm-relative helicity
-19 m²/s²
0-3 km storm-relative helicity
13 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
4.2 K/km

Open this sounding in Storm Lab

The surface observations

Holdrege/Brewstr (HDE), 27 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
00:30 UTC66.264.450° 19 kt221004.7
00:34 UTC66.262.660° 18 kt221005.4
01:10 UTC64.462.6100° 10 kt1005.8
01:30 UTC64.462.640° 21 kt261006.4
01:50 UTC64.462.650° 21 kt271006.8
02:10 UTC64.462.670° 17 kt231005.8
02:30 UTC64.462.670° 21 kt251006.4
02:50 UTC64.462.630° 19 kt281007.1
03:10 UTC64.462.670° 22 kt261006.8
03:30 UTC64.460.870° 21 kt261007.1

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

This ground now

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

The other tornadoes of May 21, 1998

14 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 2110:35 AM MDTF0Niobrara, WY2.030
May 2110:50 AM MDTF0Scotts Bluff, NE0.530
May 2110:58 AM MDTF0Scotts Bluff, NE3.030
May 2111:03 AM MDTF2Scotts Bluff, NE4.050$10,000
May 2111:17 AM MDTF1Scotts Bluff, NE0.230$4,000
May 2111:30 AM MDTF0Scotts Bluff, NE3.030
May 213:30 PM MDTF0Weber, UT0.130$20,000
May 213:30 PM MDTF0Davis, UT0.130$20,000
May 214:40 PM CDTF0Camden, MO0.780$30,000
May 217:33 PM CDTF0Red Willow, NE0.230
May 216:45 PM MDTF0Perkins, NE0.130
May 218:30 PM CDTF0Monona, IA0.250
May 219:20 PM CDTF1Cass, IA0.540$70,000
May 219:55 PM CDTF0Kearney, NE0.230

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.