Upper level troughing over the northern plains and upper midwest and a baroclinic zone across the southern and central plains were set up on August 10. A component of the mid level flow across the Rockies resulted in weak low level troughing over the southern high plains and low level moisture inflow into southwestern Kansas A weak cold front approached western Kansas by the evening as a disturbance in northwesterly flow passed to our northeast. Ample low level moisture, surface heating and 40-50kt 0-6 km bulk shear all helped in the development of thunderstorms. Supercell thunderstorms developed in the afternoon before convection evolved into a large cluster, accompanied by widespread large hail, damaging wind and flooding.

Thunderstorm Wind in MORTON, KANSAS
From 10-AUG-17 20:15:00 to 10-AUG-17 20:15:00 (CST-6)
Location: RICHFIELD
Magnitude: 56.00 MG
Reported by: Public

Thunderstorm Wind in MORTON, KANSAS
From 10-AUG-17 21:00:00 to 10-AUG-17 21:00:00 (CST-6)
Location: ROLLA
Magnitude: 52.00 EG
Reported by: Public

Winds were estimated to be 60 MPH.

Thunderstorm Wind in MORTON, KANSAS
From 10-AUG-17 21:02:00 to 10-AUG-17 21:02:00 (CST-6)
Location: (1K5)ELKHART
Magnitude: 56.00 MG
Reported by: COOP Observer

Heavy Rain in MEADE, KANSAS
From 10-AUG-17 22:00:00 to 11-AUG-17 03:00:00 (CST-6)
Location: MEADE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Rainfall was 2.60 inches.

Heavy Rain in SCOTT, KANSAS
From 10-AUG-17 19:10:00 to 11-AUG-17 00:10:00 (CST-6)
Location: SCOTT CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Rainfall was 3.58 inches.

Heavy Rain in CLARK, KANSAS
From 10-AUG-17 22:00:00 to 11-AUG-17 06:00:00 (CST-6)
Location: ASHLAND KRIER ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall was 4.89 inches.

Heavy Rain in SEWARD, KANSAS
From 10-AUG-17 22:00:00 to 11-AUG-17 06:00:00 (CST-6)
Location: HAYNE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall was 5.24 inches.

Heavy Rain in SEWARD, KANSAS
From 10-AUG-17 22:00:00 to 11-AUG-17 06:00:00 (CST-6)
Location: (LBL)LIBERAL ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Rainfall was 5.20 inches at the airport.

Heavy Rain in MORTON, KANSAS
From 10-AUG-17 22:00:00 to 11-AUG-17 06:00:00 (CST-6)
Location: RICHFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall was 4.0 inches.

Heavy Rain in HAMILTON, KANSAS
From 10-AUG-17 22:00:00 to 11-AUG-17 05:00:00 (MST-7)
Location: KENDALL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall was 3.26 inches.

Heavy Rain in MEADE, KANSAS
From 10-AUG-17 22:00:00 to 11-AUG-17 06:00:00 (CST-6)
Location: MEADE STATE PARK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall was 3.29 inches.

Heavy Rain in STANTON, KANSAS
From 10-AUG-17 22:00:00 to 11-AUG-17 06:00:00 (CST-6)
Location: JOHNSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall was 2.52 inches.

Heavy Rain in COMANCHE, KANSAS
From 10-AUG-17 22:00:00 to 11-AUG-17 06:00:00 (CST-6)
Location: PROTECTION
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall was 2.50 inches.

Heavy Rain in GRANT, KANSAS
From 10-AUG-17 22:00:00 to 11-AUG-17 06:00:00 (CST-6)
Location: STANO STATION
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall was 2.26 inches.

Heavy Rain in SCOTT, KANSAS
From 10-AUG-17 02:00:00 to 11-AUG-17 03:10:00 (CST-6)
Location: GRIGSTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Rainfall was 2.18 inches.

Hail in TREGO, KANSAS
From 10-AUG-17 13:30:00 to 10-AUG-17 13:30:00 (CST-6)
Location: VODA
Magnitude: 4.25 
Reported by: Emergency Manager

Winds were 70 to 80 MPH while the giant hail fell.

Hail in TREGO, KANSAS
From 10-AUG-17 13:31:00 to 10-AUG-17 13:31:00 (CST-6)
Location: VODA
Magnitude: 4.25 
Reported by: Emergency Manager

High winds accompanied the hail.

Hail in TREGO, KANSAS
From 10-AUG-17 13:37:00 to 10-AUG-17 13:37:00 (CST-6)
Location: WAKEENEY
Magnitude: 2.50 
Reported by: NWS Employee

Winds were at least 70 MPH while the hail fell.  Nearly every window was broken in structures and vehicles.

Hail in TREGO, KANSAS
From 10-AUG-17 13:38:00 to 10-AUG-17 13:38:00 (CST-6)
Location: WAKEENEY
Magnitude: 2.50 
Reported by: NWS Employee

Winds were at least 70 MPH.

Hail in TREGO, KANSAS
From 10-AUG-17 13:48:00 to 10-AUG-17 13:48:00 (CST-6)
Location: WAKEENEY
Magnitude: 2.50 
Reported by: Public

Hail in RUSH, KANSAS
From 10-AUG-17 15:25:00 to 10-AUG-17 15:25:00 (CST-6)
Location: TIMKEN
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in STAFFORD, KANSAS
From 10-AUG-17 16:10:00 to 10-AUG-17 16:10:00 (CST-6)
Location: SEWARD
Magnitude: 1.75 
Reported by: Public

Hail in STAFFORD, KANSAS
From 10-AUG-17 16:35:00 to 10-AUG-17 16:35:00 (CST-6)
Location: ST JOHN
Magnitude: 1.00 
Reported by: Public

Hail in FORD, KANSAS
From 10-AUG-17 16:50:00 to 10-AUG-17 16:50:00 (CST-6)
Location: BELLEFONT
Magnitude: 1.00 
Reported by: Public

Hail in KIOWA, KANSAS
From 10-AUG-17 17:35:00 to 10-AUG-17 17:35:00 (CST-6)
Location: JOY
Magnitude: 1.00 
Reported by: Public

Hail in KIOWA, KANSAS
From 10-AUG-17 17:55:00 to 10-AUG-17 17:55:00 (CST-6)
Location: JOY
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in KIOWA, KANSAS
From 10-AUG-17 18:19:00 to 10-AUG-17 18:19:00 (CST-6)
Location: GREENSBURG
Magnitude: 1.00 
Reported by: Law Enforcement

Hail in STANTON, KANSAS
From 10-AUG-17 19:35:00 to 10-AUG-17 19:35:00 (CST-6)
Location: MANTER
Magnitude: 2.00 
Reported by: Public

Hail in STANTON, KANSAS
From 10-AUG-17 19:45:00 to 10-AUG-17 19:45:00 (CST-6)
Location: MANTER
Magnitude: 1.25 
Reported by: Public

Hail in MORTON, KANSAS
From 10-AUG-17 20:50:00 to 10-AUG-17 20:50:00 (CST-6)
Location: ROLLA
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in MORTON, KANSAS
From 10-AUG-17 21:00:00 to 10-AUG-17 21:00:00 (CST-6)
Location: ROLLA
Magnitude: 0.75 
Reported by: Public

Heavy Rain in TREGO, KANSAS
From 10-AUG-17 12:00:00 to 10-AUG-17 18:00:00 (CST-6)
Location: OGALLAH
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Rainfall was 2.55 inches of which most fell in an hour.

Heavy Rain in SEWARD, KANSAS
From 10-AUG-17 18:00:00 to 10-AUG-17 23:00:00 (CST-6)
Location: LIBERAL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall was 5.0 inches.

Heavy Rain in STANTON, KANSAS
From 10-AUG-17 18:00:00 to 10-AUG-17 23:00:00 (CST-6)
Location: MANTER
Reported by: Mesonet

Thunderstorm Wind in STANTON, KANSAS
From 10-AUG-17 09:45:00 to 10-AUG-17 09:45:00 (CST-6)
Location: JOHNSON
Magnitude: 74.00 EG
Reported by: Law Enforcement

Twenty power poles were blown down by the high wind.

Thunderstorm Wind in TREGO, KANSAS
From 10-AUG-17 13:30:00 to 10-AUG-17 13:30:00 (CST-6)
Location: WAKEENEY
Magnitude: 78.00 EG
Reported by: Law Enforcement

A semi tractor trailer was blown over on the interstate.

Thunderstorm Wind in TREGO, KANSAS
From 10-AUG-17 13:36:00 to 10-AUG-17 13:36:00 (CST-6)
Location: WAKEENEY
Magnitude: 70.00 EG
Reported by: NWS Employee

Siding was blown off a DQ but was also accompanied by very large hail shattering much of the siding.

Thunderstorm Wind in TREGO, KANSAS
From 10-AUG-17 13:36:00 to 10-AUG-17 13:36:00 (CST-6)
Location: WAKEENEY
Magnitude: 78.00 EG
Reported by: NWS Employee

Many homes had siding damage from hail and high wind.  A nearby crop field was completely destroyed.

Thunderstorm Wind in TREGO, KANSAS
From 10-AUG-17 13:48:00 to 10-AUG-17 13:48:00 (CST-6)
Location: WAKEENEY
Magnitude: 87.00 EG
Reported by: Public

Windows were broken and trees were uprooted by the high wind.

Thunderstorm Wind in ELLIS, KANSAS
From 10-AUG-17 14:24:00 to 10-AUG-17 14:24:00 (CST-6)
Location: HOG BACK
Magnitude: 65.00 EG
Reported by: Public

Winds were estimated to be 75 MPH.

Thunderstorm Wind in STAFFORD, KANSAS
From 10-AUG-17 16:10:00 to 10-AUG-17 16:10:00 (CST-6)
Location: SEWARD
Magnitude: 61.00 EG
Reported by: Law Enforcement

Power lines were blown down.

Thunderstorm Wind in STEVENS, KANSAS
From 10-AUG-17 10:51:00 to 10-AUG-17 10:51:00 (CST-6)
Location: WOODS
Magnitude: 52.00 EG
Reported by: Public

Two to three inch diameter tree branches were broken by the high wind.

Thunderstorm Wind in MORTON, KANSAS
From 10-AUG-17 19:45:00 to 10-AUG-17 19:45:00 (CST-6)
Location: WILBURTON
Magnitude: 53.00 MG
Reported by: Public

Thunderstorm Wind in MORTON, KANSAS
From 10-AUG-17 20:00:00 to 10-AUG-17 20:00:00 (CST-6)
Location: ELKHART
Magnitude: 65.00 MG
Reported by: C-MAN Station