One supercell thunderstorm developed over Ottawa county around 5pm on May 25th. That storm went on to produce 4 documented tornadoes including a 26 mile long violent EF4 tornado that was on the ground for around 90 minutes.  Most of the damage was done in Dickinson County Kansas where 20-25 homes were damaged or destroyed. The supercell thunderstorm continued into Morris and Wabaunsee counties where it produced 2 more tornadoes before dissipating that evening.

Hail in OTTAWA, KANSAS
From 25-MAY-16 17:30:00 to 25-MAY-16 17:31:00 (CST-6)
Location: LINDSEY
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in OTTAWA, KANSAS
From 25-MAY-16 17:43:00 to 25-MAY-16 17:44:00 (CST-6)
Location: BENNINGTON
Magnitude: 1.75 
Reported by: Emergency Manager

Hail in DICKINSON, KANSAS
From 25-MAY-16 19:40:00 to 25-MAY-16 19:41:00 (CST-6)
Location: MOONLIGHT
Magnitude: 1.00 
Reported by: Fire Department/Rescue

Just north of Detroit, Kansas.

Tornado in MORRIS, KANSAS
From 25-MAY-16 20:27:00 to 25-MAY-16 20:40:00 (CST-6)
Location: DWIGHT
Tornado F-scale: EF1
Reported by: NWS Storm Survey

The 3rd tornado of the day that was spawned by the long lived supercell occurred just east of Dwight and tracked ESE doing damage to barns and power poles along the path. The track is based on local storm reports and radar data with input from Emergency Managers.

Tornado in WABAUNSEE, KANSAS
From 25-MAY-16 21:25:00 to 25-MAY-16 21:32:00 (CST-6)
Location: ESKRIDGE
Tornado F-scale: EF1
Reported by: NWS Storm Survey

The 4th and final tornado of the day was produced by the same long lived supercell thunderstorm that produced all other tornadoes.  This tornado did damage to one structure and to power poles along its path.  The tornado was reported to be on the ground at K-99 and K-31 by law enforcement and it dissipated around one half mile east of this location.

Hail in OTTAWA, KANSAS
From 25-MAY-16 17:09:00 to 25-MAY-16 17:10:00 (CST-6)
Location: MINNEAPOLIS
Magnitude: 1.75 
Reported by: Trained Spotter

Tornado in OTTAWA, KANSAS
From 25-MAY-16 17:08:00 to 25-MAY-16 17:09:00 (CST-6)
Location: TESCOTT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Off duty NWS employee reported a brief tornado that lasted around 90 seconds in an open field.

Tornado in DICKINSON, KANSAS
From 25-MAY-16 18:20:00 to 25-MAY-16 19:40:00 (CST-6)
Location: SOLOMON
Tornado F-scale: EF4
Reported by: NWS Storm Survey

The long track violent tornado began 1-2 miles NNE of Niles Kansas and destroyed 2 homes in Ottawa county before crossing into Dickinson county north of Solomon.  The tornado tracked 2-3 miles north of the city of Abilene following a meandering path approximately east along 2700 avenue in Dickinson county before veering southeast and crossing interstate 70 approx. 2 miles west of the city of Chapman.  The tornado then moved ESE and then east along a path around 1 mile south of Chapman destroying 1 farmstead and several other homes in the area.  The worst damage was done to a farmstead 1 mile southwest of Chapman along old highway 40 where the home was destroyed and all outbuildings were blown away.  The sub floor of the home was removed from a bolted sill plate and the poured concrete foundation was cracked on the south side exposing the rebar where the strongest forces from the lifting structure occurred as it was being removed and blown away likely occurred.  Much of the brick facade of the home did remain where it fell around the structure however so the area was not swept clean. Winds approaching 200 mph were likely in this area while a woman home at the time took shelter in the basement and was ok with only superficial injuries.  The approximate number of minor injuries was 5 reported to NWS however none required a hospital visit.  Photos of the damage are available off of the NWS damage assessment toolkit website at https://apps.dat.noaa.gov/StormDamage/DamageViewer/ .

Tornado in OTTAWA, KANSAS
From 25-MAY-16 18:07:00 to 25-MAY-16 18:20:00 (CST-6)
Location: NILES
Tornado F-scale: EF3
Reported by: NWS Storm Survey

The 26 mile long violent tornado began 1-2 miles NNE of Niles Kansas and destroyed 2 homes in Ottawa county before crossing into Dickinson county.  The tornado produced high end EF3 damage in extreme eastern Ottawa county.  Only 3 minor injuries were reported but none requiring a trip to the hospital.