Tornadoes · United States · Kansas · 2026
Unrated tornado, Atchison County, Kansas, April 17, 2026
This Unrated tornado ran 0.0 miles across Atchison County on April 17, 2026, touching down at 3:08 PM CDT. It killed nobody.
Preliminary. This is NWS EAX's damage survey, filed in the Damage Assessment Toolkit as Atchison. 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
- April 17, 2026
- Touchdown
- 3:08 PM CDT (20:08 UTC)
- Path length
- 0.0 miles (0.0 km)
- Path width
- 0 yards (0 m)
- Deaths
- 0
- Injuries
- 0
- County
- Atchison County
- Touchdown point
- 39.463, -95.104
- Lift-off point
- 39.463, -95.104
- Surveyed by
- NWS EAX
- The office's name for it
- Atchison
- Survey last edited
- April 18, 2026
- Record number
- None yet. SPC numbers 2026 in the spring of 2027.
What the survey found
Storm chaser observed brief tornado near the intersection of 230th Road and Sheridan Road in Atchison County, KS. Time was approximately 3:08 pm CDT on April 17 as estimated by radar data. Rating as EF-U since no visible damage was observed in this area, according to emergency management.
Written by NWS EAX in the NWS Damage Assessment Toolkit. A survey is revised as better evidence arrives.
The damage survey
1 damage points were recorded along this path by NWS EAX, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EFU.
- Storm chaser observed brief tornado near the intersection of 230th Road and Sheridan Road in Atchison County, KS. Time was approximately 3:08 pm CDT on April 17 as estimated by radar data. Rating as EF-U since no visible damage was observed in this area, according to emergency management.
Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.
The warnings
11 minutes of warning. NWS EAX issued a tornado warning for this county at 19:57 UTC, 11 minutes before the tornado touched down, in force until 20:30 UTC.
The county was under a tornado watch, issued at 18:42 UTC and running to 22:55 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 18:42 UTC | 22:55 UTC | Tornado Watch | EAX |
| 19:27 UTC | 20:15 UTC | Severe Thunderstorm Warning | EAX |
| 19:38 UTC | 20:15 UTC | Severe Thunderstorm Warning | EAX |
| 19:57 UTC | 20:30 UTC | Tornado Warning | EAX |
| 20:07 UTC | 20:45 UTC | Severe Thunderstorm Warning | EAX |
| 20:39 UTC | 21:21 UTC | Severe Thunderstorm Warning | EAX |
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 Enhanced Risk, with a 0.05 chance of a tornado within 25 miles, in the hatched area where significant tornadoes were expected. The outlook in force was issued at 19:53 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.
Topeka, KS (KTOP), 12:00Z
8.1 hours before the tornado, 69 km from the path. April 17, 2026.
- Mixed-layer CAPE
- 2338 J/kg
- Mixed-layer CIN
- -172 J/kg
- Surface CAPE
- 2427 J/kg
- Mixed-layer LCL
- 934 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 379 m²/s²
- 0-3 km storm-relative helicity
- 354 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 16.5
- 0-3 km lapse rate
- 5.7 K/km
Topeka, KS (KTOP), 00:00Z
3.9 hours after it, 69 km from the path. April 18, 2026.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- -100593 J/kg
- Surface CAPE
- 0 J/kg
- Mixed-layer LCL
- 1515 m above ground
- 0-6 km bulk shear
- 87 kt
- 0-1 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -101 m²/s²
- 0-3 km storm-relative helicity
- 177 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
- 0-3 km lapse rate
- 5.5 K/km
The radar
The Pleasant Hill radar (KEAX), 103 km away, was scanning. The volume nearest the touchdown began at 20:08 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.
What was reported nearby
Local storm reports within 60 km of the path, in the three hours either side.
| Time (UTC) | Report | Where | County | Remark |
|---|---|---|---|---|
| 19:29 UTC | HAIL 1 | 1 E Valley Falls | Jefferson, KS | |
| 20:05 UTC | TORNADO | 3 Ne Potter | Atchison, KS | Spotter saw a brief touchdown. |
| 20:08 UTC | HAIL 1 | Atchison | Atchison, KS | Social media report. Time estimated from radar. |
| 20:08 UTC | TORNADO | 3 Ne Potter | Atchison, KS | Storm chaser observed brief tornado near the intersection of 230th Road and Sheridan Road in Atchison County, KS. Time was approximately 3:08 pm CDT on April 17 as estimated by radar data. Rating as EF-U since no visible |
| 20:47 UTC | HAIL 1 | Potter | Atchison, KS | |
| 21:46 UTC | TSTM WND DMG | 1 Nw Kansas City Kansas | Wyandotte, KS | Downed wires and power outages near Everett Avenue. Time estimated from radar. |
| 21:48 UTC | TSTM WND DMG | 1 Wnw Kansas City Kansa | Wyandotte, KS | Downed wires near Nebraska Avenue. Time estimated from radar. |
| 21:52 UTC | TSTM WND DMG | 3 Nnw Roeland Park | Wyandotte, KS | Downed power lines near 31st Street. Time estimated from radar. |
| 22:08 UTC | TSTM WND DMG | 2 Nnw Mission | Wyandotte, KS | Downed wires and power outages near 36th Street. Time estimated from radar. |
From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.
This ground now
The live radar over the trackEvery 2026 tornado in KansasEvery tornado in Kansas since 1950Warnings in force in Kansas nowThe forecast where you are
The other tornadoes of April 17, 2026
88 more have been surveyed in the United States that day, so far.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| April 17 | 1:46 PM CDT | EF0 | Mower, MN | 2.8 | 110 | |||
| April 17 | 1:55 PM CDT | EF0 | Dodge, MN | 5.3 | 150 | |||
| April 17 | 2:19 PM CDT | EF2 | Olmsted, MN | 9.7 | 250 | 2 | ||
| April 17 | 2:32 PM CDT | Unrated | Butler, IA | 1.6 | 10 | |||
| April 17 | 2:33 PM CDT | EF1 | Olmsted, MN | 12.4 | 200 | |||
| April 17 | 2:47 PM CDT | EF1 | Jo Daviess, IL | 3.7 | 100 | |||
| April 17 | 2:47 PM CDT | EF2 | Olmsted, MN | 7.7 | 200 | |||
| April 17 | 2:47 PM CDT | EF0 | Howard, IA | 4.2 | 60 | 1 | ||
| April 17 | 3:26 PM CDT | EF3 | Buffalo, WI | 10.3 | 300 | |||
| April 17 | 3:36 PM CDT | EF2 | Stephenson, IL | 12.5 | 1,250 | |||
| April 17 | 4:07 PM CDT | EF1 | Osage, KS | 1.1 | 75 | |||
| April 17 | 4:09 PM CDT | EF1 | Trempealeau, WI | 5.6 | 90 | |||
| April 17 | 4:17 PM CDT | Unrated | Clayton, IA | 0.6 | 20 | |||
| April 17 | 4:20 PM CDT | EF1 | Trempealeau, WI | 4.6 | 130 | |||
| April 17 | 4:35 PM CDT | Unrated | Winnebago, IL | 0.7 | 50 | |||
| April 17 | 4:44 PM CDT | EF1 | Marathon, WI | 4.3 | 100 | |||
| April 17 | 4:46 PM CDT | EF3 | Marathon, WI | 13.5 | 600 | $8,000 | ||
| April 17 | 4:52 PM CDT | EF1 | Jackson, WI | 2.3 | 150 | |||
| April 17 | 4:57 PM CDT | EF1 | Winnebago, IL | 5.0 | 400 | |||
| April 17 | 5:02 PM CDT | EF1 | Washington, IA | 5.3 | 100 | |||
| April 17 | 5:19 PM CDT | EF1 | Cass, MO | 4.8 | 0 | |||
| April 17 | 6:02 PM CDT | EF1 | Rock, WI | 1.9 | 75 | |||
| April 17 | 6:05 PM CDT | EF1 | Rock, WI | 2.1 | 100 | |||
| April 17 | 6:15 PM CDT | EF1 | Rock, WI | 4.4 | 75 | |||
| April 17 | 6:39 PM CDT | EF1 | Walworth, WI | 3.0 | 75 | |||
| April 17 | 6:40 PM CDT | EF0 | Mercer, IL | 0.9 | 50 | |||
| April 17 | 6:43 PM CDT | EF1 | Walworth, WI | 3.1 | 75 | |||
| April 17 | 6:55 PM CDT | EF1 | Hancock, IL | 5.7 | 150 | |||
| April 17 | 6:55 PM CDT | EF0 | Kay, OK | 5.1 | 100 | |||
| April 17 | 7:03 PM CDT | EF1 | Winnebago, IL | 11.6 | 350 | |||
| April 17 | 7:03 PM CDT | EF1 | Kay, OK | 14.4 | 1,200 | |||
| April 17 | 7:04 PM CDT | EF1 | Henry, IL | 0.3 | 50 | |||
| April 17 | 7:11 PM CDT | EF1 | Kay, OK | 0.9 | 75 | |||
| April 17 | 7:12 PM CDT | EF1 | Kay, OK | 0.3 | 75 | |||
| April 17 | 7:13 PM CDT | EF1 | Hancock, IL | 6.0 | 75 | |||
| April 17 | 7:15 PM CDT | EF1 | Knox, IL | 10.3 | 800 | |||
| April 17 | 7:19 PM CDT | EF1 | Benton, MO | 5.9 | 0 | |||
| April 17 | 7:22 PM CDT | EF0 | Walworth, WI | 1.9 | 50 | |||
| April 17 | 7:23 PM CDT | EF0 | Benton, MO | 0.4 | 200 | |||
| April 17 | 7:25 PM CDT | EF1 | Benton, MO | 1.6 | 150 | |||
| April 17 | 7:29 PM CDT | EF2 | McDonough, IL | 12.8 | 200 | $90 | ||
| April 17 | 7:32 PM CDT | EF0 | Racine, WI | 1.4 | 50 | |||
| April 17 | 7:40 PM CDT | EF2 | Fulton, IL | 18.1 | 500 | $500 | ||
| April 17 | 7:44 PM CDT | EF0 | Morgan, MO | 1.2 | 0 | |||
| April 17 | 7:46 PM CDT | EF1 | Morgan, MO | 7.2 | 300 | |||
| April 17 | 7:50 PM CDT | EF1 | Schuyler, IL | 36.7 | 1,200 | |||
| April 17 | 7:52 PM CDT | EF0 | Waukesha, WI | 0.6 | 70 | |||
| April 17 | 7:55 PM CDT | EF0 | Racine, WI | 3.7 | 50 | |||
| April 17 | 7:56 PM CDT | EF1 | Racine, WI | 5.2 | 75 | |||
| April 17 | 7:59 PM CDT | EF0 | Morgan, MO | 1.3 | 150 | |||
| April 17 | 8:08 PM CDT | EF0 | Cole, MO | 3.5 | 50 | |||
| April 17 | 8:11 PM CDT | EF1 | Mason, IL | 15.4 | 200 | |||
| April 17 | 8:14 PM CDT | EF1 | Bureau, IL | 17.6 | 300 | |||
| April 17 | 8:22 PM CDT | EF1 | Tazewell, IL | 6.3 | 100 | |||
| April 17 | 8:26 PM CDT | EF1 | Menard, IL | 5.9 | 300 | |||
| April 17 | 8:27 PM CDT | EF1 | Tazewell, IL | 2.3 | 500 | |||
| April 17 | 8:27 PM CDT | EF1 | Tazewell, IL | 2.3 | 70 | $50 | ||
| April 17 | 8:29 PM CDT | EF1 | Tazewell, IL | 4.6 | 1,100 | |||
| April 17 | 8:31 PM CDT | EF0 | Callaway, MO | 2.3 | 50 | |||
| April 17 | 8:34 PM CDT | EF2 | Tazewell, IL | 4.0 | 1,000 |
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.