Tornadoes · United States · Nebraska · 2026
Unrated tornado, Kimball County, Nebraska, August 13, 2026
This Unrated tornado ran 0.9 miles across Kimball County on August 13, 2026, touching down at 4:46 PM MDT and reaching 10 yards wide. It killed nobody.
Preliminary. This is NWS CYS's damage survey, filed in the Damage Assessment Toolkit. The rating, the path and the casualties are the survey's and can change while it is revised. The Storm Prediction Center compiles the official record of 2026 from these surveys and publishes it in the spring of 2027; this page moves to that tornado's permanent address when it does.
The rating scale
Tracks are drawn in the color of the rating. The Enhanced Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.
EF065 to 85 mph
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
EF186 to 110 mph
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
EF2111 to 135 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.
EF3136 to 165 mph
Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.
EF4166 to 200 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
EF5over 200 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.
Unratedthis tornado
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 survey
- Rating, as surveyed
- Unrated, preliminary
- Date
- August 13, 2026
- Touchdown
- 4:46 PM MDT (22:46 UTC)
- Lifted
- 4:50 PM MDT (22:50 UTC)
- On the ground
- 4 minutes
- Path length
- 0.9 miles (1.4 km)
- Path width
- 10 yards (9 m)
- Deaths
- 0
- Injuries
- 0
- County
- Kimball County
- Touchdown point
- 41.045, -103.683
- Lift-off point
- 41.050, -103.668
- Surveyed by
- NWS CYS
- Survey last edited
- August 31, 2026
- Record number
- None yet. SPC numbers 2026 in the spring of 2027.
What the survey found
A weak landspout was observed from HWY 71 and CR 8 south of Kimball.
Written by NWS CYS in the NWS Damage Assessment Toolkit. A survey is revised as better evidence arrives.
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) | Expired | Product | Office |
|---|---|---|---|
| 21:00 UTC | 04:00 UTC | Flood Watch | CYS |
| 01:10 UTC | 02:00 UTC | Severe Thunderstorm Warning | CYS |
| 01:37 UTC | 04:45 UTC | Flash Flood Warning | CYS |
| 01:55 UTC | 02:45 UTC | Severe Thunderstorm Warning | CYS |
| 02:14 UTC | 02:42 UTC | Tornado Warning | CYS |
| 02:58 UTC | 06:00 UTC | Flash Flood Warning | CYS |
| 03:01 UTC | 03:22 UTC | Severe Thunderstorm Warning | CYS |
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 Marginal 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), 00:00Z
1.2 hours after it, 258 km from the path. August 14, 2026.
- Mixed-layer CAPE
- 980 J/kg
- Mixed-layer CIN
- -44 J/kg
- Surface CAPE
- 2000 J/kg
- Mixed-layer LCL
- 1141 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.9
- 0-3 km lapse rate
- 6.3 K/km
The radar
The Cheyenne radar (KCYS), 95 km away, was scanning. The volume nearest the touchdown began at 22:46 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 2026 tornado in NebraskaEvery tornado in Nebraska since 1950Warnings in force in Nebraska nowThe forecast where you are
The other tornadoes of August 13, 2026
5 more have been surveyed in the United States that day, so far.
What this means
Ratings are the survey's, read off the damage rather than measured; the rating scale is above. A survey can be revised, so the rating, the path and the casualties can all still change.
Sources
NWS Damage Assessment Toolkit, the record the survey teams file from the damage, and NOAA Storm Prediction Center storm reports. Neither is the official database for 2026, which SPC publishes in the spring of 2027.