A lone supercell formed in Sheridan county during the early evening and remained about stationary for over an hour, producing multiple tornadoes, hail and flash flooding.

Tornado in SHERIDAN, KANSAS
From 11-JUN-10 20:00:00 to 11-JUN-10 20:07:00 (CST-6)
Location: LUCERNE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement relayed a spotter report of two distinct tornadoes about 1/4 to 1/2 mile apart moving slowly northwest.  The tornadoes did not merge nor appear to rotate around one another and were mostly right along or just south of the Sheridan-Decatur county line..

Hail in DECATUR, KANSAS
From 11-JUN-10 19:51:00 to 11-JUN-10 19:51:00 (CST-6)
Location: LEOVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report relayed by law enforcement.

Hail in GREELEY, KANSAS
From 11-JUN-10 20:27:00 to 11-JUN-10 20:27:00 (MST-7)
Location: TRIBUNE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in GREELEY, KANSAS
From 11-JUN-10 20:28:00 to 11-JUN-10 20:28:00 (MST-7)
Location: HORACE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in WALLACE, KANSAS
From 11-JUN-10 20:32:00 to 11-JUN-10 20:32:00 (MST-7)
Location: SHARON SPGS ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DECATUR, KANSAS
From 11-JUN-10 20:35:00 to 11-JUN-10 20:35:00 (CST-6)
Location: JENNINGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rainfall was also causing ditches to fill rapidly.

Hail in SHERMAN, KANSAS
From 11-JUN-10 20:43:00 to 11-JUN-10 20:43:00 (MST-7)
Location: RULETON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Tornado in SHERIDAN, KANSAS
From 11-JUN-10 19:15:00 to 11-JUN-10 19:45:00 (CST-6)
Location: LUCERNE
Tornado F-scale: EF1
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

A tornado formed in northeast Sheridan county and moved very slowly north.  One farmhouse had most of its windows blown in and many tall cedar trees uprooted.  Several doors were damaged and had to be replaced.  Part of the roof was off a barn and farm implements were overturned.  A center pivot and an anhydrous ammonia tank were also overturned just south of the farmhouse.

Tornado in SHERIDAN, KANSAS
From 11-JUN-10 20:00:00 to 11-JUN-10 20:07:00 (CST-6)
Location: LUCERNE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement relayed a spotter report of two distinct tornadoes about 1/4 to 1/2 mile apart moving slowly northwest.  The tornadoes did not merge nor appear to rotate around one another and were mostly right along or just south of the Sheridan-Decatur county line..

Tornado in SHERIDAN, KANSAS
From 11-JUN-10 19:17:00 to 11-JUN-10 19:20:00 (CST-6)
Location: LUCERNE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A distinct satellite tornado formed and after several minutes merged with the first tornado which had formed two minutes earlier.  A series of pictures showed two tornadoes about a quarter mile apart with one rotating around the other and finally the two merged over open fields.  Thus this satellite tornado produced no damage while the first tornado went on to damage a farmhouse.

Flash Flood in NORTON, KANSAS
From 11-JUN-10 22:30:00 to 12-JUN-10 06:00:00 (CST-6)
Location: CLAYTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Extremely heavy rainfall occurred just west of Clayton in Norton county during the evening with radar estimated rainfall of 6 to 10 inches.  Law enforcement later that night reported that Prairie Dog Creek had gone out of its banks 4 miles east of Clayton sometime during the night, with locations of debris indicating a rapid water rise out of the banks.  Time of event is estimated from radar, rain gauge reports and law enforcement observations.

Flash Flood in DECATUR, KANSAS
From 11-JUN-10 20:25:00 to 11-JUN-10 23:25:00 (CST-6)
Location: LEOVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was reported over highway 9 from mile marker 3 to the east.