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.
F040 to 72 mphthis tornado
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
F173 to 112 mph
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
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.
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.
F4207 to 260 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
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.
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) | Expired | Product | Office |
|---|---|---|---|
| 16:03 UTC | 16:35 UTC | Severe Thunderstorm Warning | GID |
| 16:38 UTC | 17:10 UTC | Severe Thunderstorm Warning | GID |
| 00:40 UTC | 01:30 UTC | Tornado Warning | GID |
| 01:30 UTC | 02:00 UTC | Tornado Warning | GID |
| 02:01 UTC | 02:30 UTC | Tornado Warning | GID |
| 02:32 UTC | 03:00 UTC | Severe Thunderstorm Warning | GID |
| 02:42 UTC | 03:15 UTC | Tornado Warning | GID |
| 03:14 UTC | 03:45 UTC | Tornado Warning | GID |
| 04:57 UTC | 05:45 UTC | Tornado Warning | GID |
| 05:48 UTC | 06:35 UTC | Severe Thunderstorm Warning | GID |
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.
- 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
N. Platte/Lee Bi, NE (KLBF), 12:00Z
10.4 hours after it, 153 km from the path. May 22, 1998.
- 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
The surface observations
Holdrege/Brewstr (HDE), 27 km from the path, in the two hours either side.
| Time (UTC) | Temp (°F) | Dew point (°F) | Wind | Gust (kt) | Pressure (mb) | Weather |
|---|---|---|---|---|---|---|
| 00:30 UTC | 66.2 | 64.4 | 50° 19 kt | 22 | 1004.7 | |
| 00:34 UTC | 66.2 | 62.6 | 60° 18 kt | 22 | 1005.4 | |
| 01:10 UTC | 64.4 | 62.6 | 100° 10 kt | 1005.8 | ||
| 01:30 UTC | 64.4 | 62.6 | 40° 21 kt | 26 | 1006.4 | |
| 01:50 UTC | 64.4 | 62.6 | 50° 21 kt | 27 | 1006.8 | |
| 02:10 UTC | 64.4 | 62.6 | 70° 17 kt | 23 | 1005.8 | |
| 02:30 UTC | 64.4 | 62.6 | 70° 21 kt | 25 | 1006.4 | |
| 02:50 UTC | 64.4 | 62.6 | 30° 19 kt | 28 | 1007.1 | |
| 03:10 UTC | 64.4 | 62.6 | 70° 22 kt | 26 | 1006.8 | |
| 03:30 UTC | 64.4 | 60.8 | 70° 21 kt | 26 | 1007.1 |
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.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| May 21 | 10:35 AM MDT | F0 | Niobrara, WY | 2.0 | 30 | |||
| May 21 | 10:50 AM MDT | F0 | Scotts Bluff, NE | 0.5 | 30 | |||
| May 21 | 10:58 AM MDT | F0 | Scotts Bluff, NE | 3.0 | 30 | |||
| May 21 | 11:03 AM MDT | F2 | Scotts Bluff, NE | 4.0 | 50 | $10,000 | ||
| May 21 | 11:17 AM MDT | F1 | Scotts Bluff, NE | 0.2 | 30 | $4,000 | ||
| May 21 | 11:30 AM MDT | F0 | Scotts Bluff, NE | 3.0 | 30 | |||
| May 21 | 3:30 PM MDT | F0 | Weber, UT | 0.1 | 30 | $20,000 | ||
| May 21 | 3:30 PM MDT | F0 | Davis, UT | 0.1 | 30 | $20,000 | ||
| May 21 | 4:40 PM CDT | F0 | Camden, MO | 0.7 | 80 | $30,000 | ||
| May 21 | 7:33 PM CDT | F0 | Red Willow, NE | 0.2 | 30 | |||
| May 21 | 6:45 PM MDT | F0 | Perkins, NE | 0.1 | 30 | |||
| May 21 | 8:30 PM CDT | F0 | Monona, IA | 0.2 | 50 | |||
| May 21 | 9:20 PM CDT | F1 | Cass, IA | 0.5 | 40 | $70,000 | ||
| May 21 | 9:55 PM CDT | F0 | Kearney, NE | 0.2 | 30 |
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.