Tornadoes · United States · Nebraska · 2001
F3 tornado, Edgar, Nebraska, September 22, 2001
This F3 tornado ran 10.0 miles across Clay and Fillmore counties on September 22, 2001, touching down at 7:42 PM CDT and reaching 1,250 yards wide. It killed nobody, and did $1.3 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.
F040 to 72 mph
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 mphthis tornado
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
- F3
- Date
- September 22, 2001
- Touchdown
- 7:42 PM CDT (00:42 UTC)
- Path length
- 10.0 miles (16.1 km)
- Path width
- 1,250 yards (1143 m)
- Deaths
- 0
- Injuries
- 0
- Property damage
- $1.3 million
- Counties
- Clay and Fillmore counties
- Touchdown point
- 40.430, -97.970
- Lift-off point
- 40.470, -97.780
- Record number
- 1155
What the Weather Service recorded
A cold front sagging south into a very unstable airmass was the trigger for severe thunderstorms which produced two tornadoes and some hail across the region. Within an hour of the initial thunderstorm development, the first tornado set down southwest of Saronville in Clay county. This rope-like tornado was witnessed by many people, including numerous storm chasers, in Clay county. The tornado drifted slowly south across farmland and damaged two pivots and did some minor crop damage.The second tornado, which was rated an F3, was on the ground for about 30 minutes. The tornado basically followed state highway 74 from north of Edgar in southeast Clay county, to northwest of Shickley in far southwest Fillmore county. Along its path, 14 irrigation pivots were destroyed, at least 15 grain bins were lost and two farmsteads sustained extensive damage. One farmhouse was deemed a total loss, while another incurred broken windows, damaged siding and minor roof damage. Over 10,000 acres of corn and soybeans suffered an average yield loss of 30 percent.
Tornado exited Clay county and entered Fillmore county.
From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.
The warnings
43 minutes of warning. NWS GID issued a tornado warning for this county at 23:59 UTC, 43 minutes before the tornado touched down, in force until 00:45 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 09:19 UTC | 10:00 UTC | Severe Thunderstorm Warning | GID |
| 10:00 UTC | 10:45 UTC | Severe Thunderstorm Warning | GID |
| 23:59 UTC | 00:45 UTC | Tornado Warning | GID |
| 00:33 UTC | 01:30 UTC | Tornado Warning | GID |
| 01:52 UTC | 02:15 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 20:00 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.
Omaha, NE (KOAX), 00:00Z
0.7 hours before the tornado, 159 km from the path. September 23, 2001.
- Mixed-layer CAPE
- 2845 J/kg
- Mixed-layer CIN
- -12 J/kg
- Surface CAPE
- 2215 J/kg
- Mixed-layer LCL
- 946 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.0
- 0-3 km lapse rate
- 6.3 K/km
Omaha, NE (KOAX), 12:00Z
11.3 hours after it, 159 km from the path. September 23, 2001.
- Mixed-layer CAPE
- 3 J/kg
- Mixed-layer CIN
- -2 J/kg
- Surface CAPE
- 3 J/kg
- Mixed-layer LCL
- 570 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
- 0-3 km lapse rate
- 4.8 K/km
The radar
The Grand Island radar (KUEX), 50 km away, was scanning. The volume nearest the touchdown began at 00:42 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 2001 tornado in NebraskaEvery tornado in Nebraska since 1950Warnings in force in Nebraska nowThe forecast where you are
The other tornadoes of September 22, 2001
1 more were confirmed in the United States that day.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| September 22 | 7:07 PM CDT | F0 | Clay, NE | 3.0 | 150 | $50,000 |
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.