A supercell thunderstorm moved southward across Northwest Kansas producing flash flooding, hail up to hen egg size, and damaging winds.  The largest hail reported was in north of Goodland and in southeast Sherman County.  The slow movement of the storm and heavy rainfall caused flash flooding across northern Sherman County including flooding the South Beaver Creek and many roads.  Estimated wind gusts up to 90 MPH rolled a camper trailer, blew down a cottonwood tree, and uprooted a pine tree in Goodland.

Hail in CHEYENNE, KANSAS
From 31-MAY-17 16:55:00 to 31-MAY-17 17:15:00 (CST-6)
Location: ST FRANCIS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail up to dime size is still occurring after 20 minutes of nickel size hail.

Hail in CHEYENNE, KANSAS
From 31-MAY-17 17:00:00 to 31-MAY-17 17:23:00 (CST-6)
Location: ST FRANCIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail started off around nickel size then grew to quarter size and is still falling.  Hail is covering the ground.

Hail in SHERMAN, KANSAS
From 31-MAY-17 18:24:00 to 31-MAY-17 18:24:00 (MST-7)
Location: GOODLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in SHERMAN, KANSAS
From 31-MAY-17 18:32:00 to 31-MAY-17 18:32:00 (MST-7)
Location: GOODLAND ARPT
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in SHERMAN, KANSAS
From 31-MAY-17 18:26:00 to 31-MAY-17 18:26:00 (MST-7)
Location: GOODLAND
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SHERMAN, KANSAS
From 31-MAY-17 18:45:00 to 31-MAY-17 18:45:00 (MST-7)
Location: EDSON
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail was just a little over two inches in diameter.

Hail in LOGAN, KANSAS
From 31-MAY-17 20:10:00 to 31-MAY-17 20:40:00 (CST-6)
Location: MC ALLASTER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

During this time 0.88 inches of rain also fell.

Thunderstorm Wind in SHERMAN, KANSAS
From 31-MAY-17 18:24:00 to 31-MAY-17 18:24:00 (MST-7)
Location: GOODLAND
Magnitude: 78.00 EG
Property damage: 25.50K
Crop damage: 0.00K
Reported by: Public

Near the hospital a 30 ft. camper trailer was rolled three times, including rolling over a privacy fence and a shed.  A large cottonwood tree was also blown over and a pine tree was uprooted on the hospital campus.

Thunderstorm Wind in SHERMAN, KANSAS
From 31-MAY-17 18:19:00 to 31-MAY-17 18:25:00 (MST-7)
Location: GOODLAND ARPT
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Dime to nickel size hail also occurred with the wind gusts.

Thunderstorm Wind in SHERMAN, KANSAS
From 31-MAY-17 18:22:00 to 31-MAY-17 18:22:00 (MST-7)
Location: CARUSO
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in SHERMAN, KANSAS
From 31-MAY-17 18:45:00 to 31-MAY-17 18:45:00 (MST-7)
Location: GOODLAND ARPT
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in SHERMAN, KANSAS
From 31-MAY-17 18:28:00 to 31-MAY-17 18:30:00 (MST-7)
Location: GOODLAND ARPT
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in SHERMAN, KANSAS
From 31-MAY-17 18:36:00 to 31-MAY-17 18:40:00 (MST-7)
Location: GOODLAND ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in SHERMAN, KANSAS
From 31-MAY-17 18:53:00 to 31-MAY-17 18:55:00 (MST-7)
Location: GOODLAND ARPT
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Hail in SHERMAN, KANSAS
From 31-MAY-17 18:16:00 to 31-MAY-17 18:16:00 (MST-7)
Location: GOODLAND ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail stones of dime to nickel size accompanied the severe wind gusts.

Hail in SHERMAN, KANSAS
From 31-MAY-17 18:35:00 to 31-MAY-17 18:35:00 (MST-7)
Location: EDSON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in SHERMAN, KANSAS
From 31-MAY-17 18:30:00 to 31-MAY-17 18:30:00 (MST-7)
Location: EDSON
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

Three irrigation pivots were blown over.

Flash Flood in SHERMAN, KANSAS
From 31-MAY-17 18:30:00 to 31-MAY-17 21:00:00 (MST-7)
Location: GOODLAND ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Rainfall rate was so high water was running into the basement of the house.

Flash Flood in CHEYENNE, KANSAS
From 31-MAY-17 18:35:00 to 31-MAY-17 21:35:00 (CST-6)
Location: ST FRANCIS ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts of up to four inches in a couple hours occurred.  The rapid runoff quickly filled the channel of the Little Beaver Creek not long after the heavy rain began.  Water was reported over CR 20 south of the CR 20/CR B intersection at the Little Beaver Creek.

Flash Flood in CHEYENNE, KANSAS
From 31-MAY-17 18:35:00 to 31-MAY-17 21:35:00 (CST-6)
Location: ST FRANCIS ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts of up to four inches in a couple hours occurred.  The rapid runoff quickly filled the channel of the Little Beaver Creek not long after the heavy rain began.  Water was reported over Highway 27 at the Little Beaver Creek.

Flash Flood in CHEYENNE, KANSAS
From 31-MAY-17 20:35:00 to 31-MAY-17 23:35:00 (CST-6)
Location: BIRD CITY ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts of up to four inches in a couple hours occurred.  The rapid runoff quickly filled the channel of the Little Beaver Creek after the heavy rain began.  Water was reported over CR 23 at the Little Beaver Creek north of the CR 23/CR C intersection.

Flash Flood in CHEYENNE, KANSAS
From 31-MAY-17 19:35:00 to 31-MAY-17 22:35:00 (CST-6)
Location: BIRD CITY ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts of up to four inches in a couple hours occurred.  The rapid runoff quickly filled the channel of the Little Beaver Creek not long after the heavy rain began.  Water was reported over CR 21 at the Little Beaver Creek.