A surface boundary existed from extreme southeast Colorado to north central Kansas earlier in the day on the 20th. East of this boundary was southerly wind and surface dew points in the mid to upper 60s. Convection developed along the surface boundary in west central and north central Kansas. Any storm that developed became severe with wind and hail and moved south across western Kansas in the early evening.
This surface boundary set up the chance for late-afternoon storms the next two days as the atmosphere was able to recover each day. Severe wind and hail were reported on all three days.

Hail in SCOTT, KANSAS
From 20-JUN-17 14:30:00 to 20-JUN-17 14:30:00 (CST-6)
Location: SCOTT CITY
Magnitude: 2.00 
Reported by: Public

Hail in SCOTT, KANSAS
From 20-JUN-17 14:36:00 to 20-JUN-17 14:36:00 (CST-6)
Location: SCOTT CITY
Magnitude: 1.00 
Reported by: Public

Hail in SCOTT, KANSAS
From 20-JUN-17 14:41:00 to 20-JUN-17 14:41:00 (CST-6)
Location: SCOTT CITY
Magnitude: 1.75 
Reported by: Law Enforcement

Hail in SCOTT, KANSAS
From 20-JUN-17 14:42:00 to 20-JUN-17 14:42:00 (CST-6)
Location: SCOTT CITY
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in SCOTT, KANSAS
From 20-JUN-17 14:47:00 to 20-JUN-17 14:47:00 (CST-6)
Location: SCOTT CITY
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in SCOTT, KANSAS
From 20-JUN-17 14:50:00 to 20-JUN-17 14:50:00 (CST-6)
Location: SCOTT CITY
Magnitude: 1.75 
Reported by: Public

Hail in SCOTT, KANSAS
From 20-JUN-17 15:23:00 to 20-JUN-17 15:23:00 (CST-6)
Location: SHALLOW WATER
Magnitude: 0.88 
Reported by: Public

Hail in SCOTT, KANSAS
From 20-JUN-17 15:31:00 to 20-JUN-17 15:31:00 (CST-6)
Location: MODOC
Magnitude: 2.50 
Reported by: Public

Hail in TREGO, KANSAS
From 20-JUN-17 15:32:00 to 20-JUN-17 15:32:00 (CST-6)
Location: TREGO CENTER
Magnitude: 1.50 
Reported by: Public

Hail in SCOTT, KANSAS
From 20-JUN-17 16:14:00 to 20-JUN-17 16:14:00 (CST-6)
Location: SCOTT CITY ARPT
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in SCOTT, KANSAS
From 20-JUN-17 16:25:00 to 20-JUN-17 16:25:00 (CST-6)
Location: MODOC
Magnitude: 1.50 
Reported by: Public

Hail in KEARNY, KANSAS
From 20-JUN-17 16:46:00 to 20-JUN-17 16:46:00 (CST-6)
Location: DEERFIELD
Magnitude: 1.50 
Reported by: Public

Hail in KEARNY, KANSAS
From 20-JUN-17 16:53:00 to 20-JUN-17 16:53:00 (CST-6)
Location: DEERFIELD
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in KEARNY, KANSAS
From 20-JUN-17 17:02:00 to 20-JUN-17 17:02:00 (CST-6)
Location: LAKIN
Magnitude: 1.75 
Reported by: Emergency Manager

Hail in HAMILTON, KANSAS
From 20-JUN-17 16:07:00 to 20-JUN-17 16:07:00 (MST-7)
Location: KENDALL
Magnitude: 2.75 
Reported by: Emergency Manager

Hail in KEARNY, KANSAS
From 20-JUN-17 17:07:00 to 20-JUN-17 17:07:00 (CST-6)
Location: LAKIN
Magnitude: 2.75 
Reported by: Emergency Manager

Hail in FINNEY, KANSAS
From 20-JUN-17 17:20:00 to 20-JUN-17 17:20:00 (CST-6)
Location: RITCHAL
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in FINNEY, KANSAS
From 20-JUN-17 17:22:00 to 20-JUN-17 17:22:00 (CST-6)
Location: HOLCOMB
Magnitude: 1.50 
Reported by: Emergency Manager

Hail in GRANT, KANSAS
From 20-JUN-17 18:05:00 to 20-JUN-17 18:05:00 (CST-6)
Location: ULYSSES ARPT
Magnitude: 1.75 
Reported by: Public

Windows were broken at this location.

Hail in GRANT, KANSAS
From 20-JUN-17 18:10:00 to 20-JUN-17 18:10:00 (CST-6)
Location: ULYSSES ARPT
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in GRANT, KANSAS
From 20-JUN-17 18:15:00 to 20-JUN-17 18:15:00 (CST-6)
Location: ULYSSES
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in GRANT, KANSAS
From 20-JUN-17 18:23:00 to 20-JUN-17 18:23:00 (CST-6)
Location: ULYSSES ARPT
Magnitude: 2.00 
Reported by: Emergency Manager

Hail in GRANT, KANSAS
From 20-JUN-17 18:24:00 to 20-JUN-17 18:24:00 (CST-6)
Location: ULYSSES
Magnitude: 4.25 
Reported by: Emergency Manager

Hail in GRANT, KANSAS
From 20-JUN-17 18:46:00 to 20-JUN-17 18:46:00 (CST-6)
Location: COLUMBIAN CARBON
Magnitude: 1.50 
Reported by: Public

There was also 50 MPH wind gusts with the hail.

Hail in GRANT, KANSAS
From 20-JUN-17 19:12:00 to 20-JUN-17 19:12:00 (CST-6)
Location: COLUMBIAN CARBON
Magnitude: 0.88 
Reported by: Public

Hail in GRANT, KANSAS
From 20-JUN-17 19:17:00 to 20-JUN-17 19:17:00 (CST-6)
Location: HICKOK
Magnitude: 1.00 
Reported by: Emergency Manager

Thunderstorm Wind in ELLIS, KANSAS
From 20-JUN-17 17:24:00 to 20-JUN-17 17:24:00 (CST-6)
Location: TURKVILLE
Magnitude: 65.00 EG
Reported by: Emergency Manager

A 4 x 6 wood post was broken at the base and a double wide mobile home had roof damage.

Thunderstorm Wind in FORD, KANSAS
From 20-JUN-17 19:10:00 to 20-JUN-17 19:10:00 (CST-6)
Location: BUCKLIN
Magnitude: 61.00 EG
Reported by: Public

Three inch diameter tree limbs were broken and a trampoline was thrown into power lines.

Thunderstorm Wind in KEARNY, KANSAS
From 20-JUN-17 16:44:00 to 20-JUN-17 16:44:00 (CST-6)
Location: LAKIN
Magnitude: 61.00 EG
Reported by: Trained Spotter

Wind gusts were estimated to be 70 MPH.

Thunderstorm Wind in FINNEY, KANSAS
From 20-JUN-17 17:18:00 to 20-JUN-17 17:18:00 (CST-6)
Location: HOLCOMB
Magnitude: 51.00 MG
Reported by: Broadcast Media

Observed at the Holcomb middle school.

Thunderstorm Wind in GRANT, KANSAS
From 20-JUN-17 18:16:00 to 20-JUN-17 18:16:00 (CST-6)
Location: ULYSSES ARPT
Magnitude: 52.00 MG
Reported by: ASOS

Thunderstorm Wind in ELLIS, KANSAS
From 20-JUN-17 17:40:00 to 20-JUN-17 17:40:00 (CST-6)
Location: EMMERAM
Magnitude: 58.00 EG
Reported by: Public

Winds were estimated at 60 to 70 MPH.

Thunderstorm Wind in GRANT, KANSAS
From 20-JUN-17 19:23:00 to 20-JUN-17 19:23:00 (CST-6)
Location: RYUS
Magnitude: 52.00 EG
Reported by: Public

Winds were estimated to be 60 MPH.

Hail in SCOTT, KANSAS
From 20-JUN-17 14:21:00 to 20-JUN-17 14:21:00 (CST-6)
Location: MODOC
Magnitude: 1.50 
Reported by: Public

Hail in SCOTT, KANSAS
From 20-JUN-17 14:02:00 to 20-JUN-17 14:02:00 (CST-6)
Location: SCOTT STATE PARK
Magnitude: 2.00 
Reported by: Public

Hail in GRANT, KANSAS
From 20-JUN-17 18:25:00 to 20-JUN-17 18:25:00 (CST-6)
Location: ULYSSES ARPT
Magnitude: 1.50 
Reported by: Emergency Manager

Hail in GRANT, KANSAS
From 20-JUN-17 18:25:00 to 20-JUN-17 18:25:00 (CST-6)
Location: ULYSSES
Magnitude: 2.50 
Reported by: Public

Broken windows in Ulysses.