Tornadoes · United States · Nebraska · 2000

F0 tornado, Elwood, Nebraska, July 20, 2000

This F0 tornado ran 0.1 miles across Gosper County on July 20, 2000, touching down at 5:55 PM CDT and reaching 10 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
July 20, 2000
Touchdown
5:55 PM CDT (22:55 UTC)
Path length
0.1 miles (0.2 km)
Path width
10 yards (9 m)
Deaths
0
Injuries
0
County
Gosper County
Touchdown point
40.480, -99.680
Lift-off point
40.480, -99.680
Record number
399

What the Weather Service recorded

A cluster of severe thunderstorms rumbled southeast across a portion of south-central Nebraska producing large hail and a brief tornado. The tornado was spotted by a deputy sheriff in southeast Gosper county. Large hail across the area did cause considerable property and crop damage from south of Bertrand to the Kansas state line south of Orleans. Reports of softball size hail were recorded south of Loomis with hail nearly as large in Holdrege. Automobiles, houses, and agricultural buildings all sustained damage in southwest Phelps county.As the storm moved southeast, it severely damaged about 33,000 acres of crop and pasture land in western Harlan county. The sheriff reported drifts along Highway 89 south of Orleans stretched for 8 miles, or to about the Kansas state line. The nearly 4 inch rain which followed the hail fell on top of 5 inches of rain just a few days earlier. Losses due to land erosion were estimated at $70,000. Ironically, this storm passed through just 3 weeks after another vicious hailstorm pummeled crops in western Harlan county. Both storms effectively wiped out any prospect of producing any significant corn or soybean crop in the western half of the county.

Brief touchdown reported by sheriff

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
22:12 UTC23:00 UTCSevere Thunderstorm WarningGID
23:00 UTC23:30 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 19:56 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), 12:00Z

10.9 hours before the tornado, 106 km from the path. July 20, 2000.

Skew-T log-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 2000-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 480 joules per kilogram, CIN -280, lifted condensation level 1070 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 12:00Z on 2000-07-20The 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 152 square meters per square second, 0 to 6 km bulk shear 47 knots.1939587897Sfc1 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
480 J/kg
Mixed-layer CIN
-280 J/kg
Surface CAPE
522 J/kg
Mixed-layer LCL
1070 m above ground
0-6 km bulk shear
47 kt
0-1 km bulk shear
26 kt
0-1 km storm-relative helicity
152 m²/s²
0-3 km storm-relative helicity
113 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1
0-3 km lapse rate
4.7 K/km

Open this sounding in Storm Lab

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

1.1 hours after it, 106 km from the path. July 21, 2000.

Skew-T log-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2000-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1425 joules per kilogram, CIN -9, lifted condensation level 1198 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 2000-07-21The 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 8 square meters per square second, 0 to 6 km bulk shear 52 knots.1939587897Sfc1 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
1425 J/kg
Mixed-layer CIN
-9 J/kg
Surface CAPE
2058 J/kg
Mixed-layer LCL
1198 m above ground
0-6 km bulk shear
52 kt
0-1 km bulk shear
1 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.7
0-3 km lapse rate
7.0 K/km

Open this sounding in Storm Lab

The radar

The Grand Island radar (KUEX), 106 km away, was scanning. The volume nearest the touchdown began at 22:57 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

This ground now

The live radar over the trackEvery 2000 tornado in NebraskaEvery tornado in Nebraska since 1950Warnings in force in Nebraska nowThe forecast where you are

The other tornadoes of July 20, 2000

7 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
July 203:35 PM EDTF0Suwannee, FL0.110$1,000
July 201:58 PM MDTF0El Paso, CO0.120
July 204:10 PM CDTF0Lawrence, TN0.120$2,000
July 205:05 PM MDTF0Washington, CO0.120
July 205:21 PM MDTF0Washington, CO0.120
July 206:20 PM MDTF0Baca, CO0.550
July 2011:21 PM CDTF0Pratt, KS1.670

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.