Tornadoes · United States · Nebraska · 1993

F1 tornado, Red Cloud, Nebraska, May 7, 1993

This F1 tornado ran 7.0 miles across Webster County on May 7, 1993, touching down at 6:50 PM CDT and reaching 200 yards wide. It killed nobody, and did $500,000 to $5 million 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
May 7, 1993
Touchdown
6:50 PM CDT (23:50 UTC)
Path length
7.0 miles (11.3 km)
Path width
200 yards (183 m)
Deaths
0
Injuries
0
Property damage
$500,000 to $5 million
County
Webster County
Touchdown point
40.020, -98.530
Lift-off point
40.100, -98.650
Record number
269

What the Weather Service recorded

Tornado touched down five miles south of Red Cloud and moved northwest. A home was damaged just south of Inavale.

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. One was issued for the county at another hour that day.

Issued (UTC)ExpiredProductOffice
23:57 UTC00:30 UTCTornado 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 Moderate Risk. The outlook in force was issued at 07:04 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.

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

11.8 hours before the tornado, 207 km from the path. May 7, 1993.

Skew-T log-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 1993-05-07Temperature 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 -9213, lifted condensation level 1888 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 1993-05-07The 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 45 square meters per square second, 0 to 6 km bulk shear 42 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
0 J/kg
Mixed-layer CIN
-9213 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
1888 m above ground
0-6 km bulk shear
42 kt
0-1 km bulk shear
10 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
163 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
2.8 K/km

Open this sounding in Storm Lab

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

0.2 hours after it, 207 km from the path. May 8, 1993.

Skew-T log-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 1993-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 640 joules per kilogram, CIN -27, lifted condensation level 1829 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 1993-05-08The 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 24 square meters per square second, 0 to 6 km bulk shear 27 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
640 J/kg
Mixed-layer CIN
-27 J/kg
Surface CAPE
1323 J/kg
Mixed-layer LCL
1829 m above ground
0-6 km bulk shear
27 kt
0-1 km bulk shear
8 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4
0-3 km lapse rate
8.4 K/km

Open this sounding in Storm Lab

This ground now

The live radar over the trackEvery 1993 tornado in NebraskaEvery tornado in Nebraska since 1950Warnings in force in Nebraska nowThe forecast where you are

The other tornadoes of May 7, 1993

45 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
May 73:06 PM CDTF0Minnehaha, SD5.050
May 73:06 PM CDTF2Lincoln, SD15.01001$50,000 to $500,000
May 73:06 PM CDTF2Lincoln, SD15.0100$50,000 to $500,000
May 73:57 PM CDTF2Lyon, IA to SD11.5100$50,000 to $500,000
May 74:20 PM CDTF1Rock, MN5.5100
May 74:30 PM CDTF1Hutchinson, SD7.050$5,000 to $50,000
May 75:05 PM CDTF2Pipestone, MN8.0150$500,000 to $5 million
May 75:10 PM CDTF0Russell, KS4.050$500 to $5,000
May 75:30 PM CDTF1Pawnee, KS4.050$50,000 to $500,000
May 75:31 PM CDTF0Stafford, KS0.110
May 75:40 PM CDTF0Stafford, KS0.513
May 75:42 PM CDTF0Kiowa, KS7.020
May 75:45 PM CDTF1Franklin, NE10.0200
May 75:45 PM CDTF0Pawnee, KS3.020$50,000 to $500,000
May 75:50 PM CDTF0Barton, KS0.550$500 to $5,000
May 75:55 PM CDTF1Murray, MN4.0100
May 75:55 PM CDTF0Hemphill, TX0.573
May 75:58 PM CDTF0Stafford, KS0.513
May 75:59 PM CDTF0Kiowa, KS5.020
May 76:05 PM CDTF4Russell, KS25.588016$500,000 to $5 million
May 76:15 PM CDTF2McCook, SD1.073$50,000 to $500,000
May 76:15 PM CDTF2Hutchinson, SD2.073$50,000 to $500,000
May 76:20 PM CDTF1Lyon, MN3.0100
May 76:20 PM CDTF3McCook, SD10.0100$500,000 to $5 million
May 76:20 PM CDTF1Barton, KS0.323$5,000 to $50,000
May 76:25 PM CDTF1Murray, MN4.0100
May 76:25 PM CDTF0Russell, KS2.050$500 to $5,000
May 76:31 PM CDTF0Collingsworth, TX1.0100
May 76:35 PM CDTF1Sherman, NE7.0200$500,000 to $5 million
May 76:37 PM CDTF1Lyon, MN9.0100
May 76:45 PM CDTF0Collingsworth, TX1.0100
May 76:49 PM CDTF0Smith, KS1.573$50 to $500
May 76:52 PM CDTF2Franklin, NE40.0200$500,000 to $5 million
May 76:53 PM CDTF0Lincoln, KS13.0440$5,000 to $50,000
May 76:55 PM CDTF1Moody, SD15.050$50,000 to $500,000
May 77:20 PM CDTF1Lyon, MN1.0704
May 77:23 PM CDTF2Pratt, KS19.5440$500 to $5,000
May 77:25 PM CDTF2Hall, NE2.0150$500,000 to $5 million
May 77:45 PM CDTF0Stafford, KS2.020
May 77:50 PM CDTF3Webster, NE75.02,633$5 million to $50 million
May 78:05 PM CDTF1Rice, KS1.0100$5,000 to $50,000
May 78:10 PM CDTF1Chippewa, MN5.0100$500,000 to $5 million
May 78:22 PM CDTF0Beckham, OK0.113$5,000 to $50,000
May 78:27 PM CDTF0Yellow Medicine, MN0.110
May 79:48 PM CDTF0Kiowa, OK0.870$500 to $5,000

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.