Supercell thunderstorms developed across South Central Kansas late on Saturday, May 10th, 2008, and moved into portions Southeast Kansas. The storms produced very large hail up to tennis ball size.  Two supercells moved across Labette County, Kansas, one producing a brief tornado touchdown before moving into Cherokee County, Kansas, and the other a tornado 2 miles south of the Kansas/Oklahoma border south of Chetopa, Kansas.  This supercell would eventually produce the EF4 tornado that struck Picher, Oklahoma.

Hail in MONTGOMERY, KANSAS
From 10-MAY-08 15:16:00 to 10-MAY-08 15:16:00 (CST-6)
Location: ELK CITY LAKE
Magnitude: 1.75 
Reported by: Trained Spotter

Hail was reported near Elk City Lake.

Tornado in LABETTE, KANSAS
From 10-MAY-08 16:19:00 to 10-MAY-08 16:20:00 (CST-6)
Location: OSWEGO
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The tornado touched down briefly in an open field.

Hail in SUMNER, KANSAS
From 10-MAY-08 14:25:00 to 10-MAY-08 14:25:00 (CST-6)
Location: GEUDA SPGS
Magnitude: 1.00 
Reported by: Trained Spotter

The hail was mostly the size of dimes but a few quarter sized stones were observed.

Hail in COWLEY, KANSAS
From 10-MAY-08 14:36:00 to 10-MAY-08 14:36:00 (CST-6)
Location: ARKANSAS CITY
Magnitude: 1.75 
Reported by: Emergency Manager

Golfball sized hail was reported on the north side of Arkansas City.

Hail in ELK, KANSAS
From 10-MAY-08 14:40:00 to 10-MAY-08 14:40:00 (CST-6)
Location: GRENOLA
Magnitude: 1.75 
Reported by: Trained Spotter

Golfball sized hail was reported.

Hail in ELK, KANSAS
From 10-MAY-08 14:47:00 to 10-MAY-08 14:47:00 (CST-6)
Location: MOLINE
Magnitude: 1.00 
Reported by: Storm Chaser

Hail in COWLEY, KANSAS
From 10-MAY-08 14:49:00 to 10-MAY-08 14:49:00 (CST-6)
Location: CAMERON CITY
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in COWLEY, KANSAS
From 10-MAY-08 14:56:00 to 10-MAY-08 14:56:00 (CST-6)
Location: DEXTER
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ELK, KANSAS
From 10-MAY-08 14:56:00 to 10-MAY-08 14:56:00 (CST-6)
Location: ELK FALLS
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in ELK, KANSAS
From 10-MAY-08 14:56:00 to 10-MAY-08 14:56:00 (CST-6)
Location: MOLINE ELK CO ARPT
Magnitude: 1.75 
Reported by: Storm Chaser

Hail in COWLEY, KANSAS
From 10-MAY-08 14:30:00 to 10-MAY-08 14:30:00 (CST-6)
Location: RAINBOW BEND
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in MONTGOMERY, KANSAS
From 10-MAY-08 15:35:00 to 10-MAY-08 15:35:00 (CST-6)
Location: CHERRYVALE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in LABETTE, KANSAS
From 10-MAY-08 15:56:00 to 10-MAY-08 15:56:00 (CST-6)
Location: PARSONS
Magnitude: 0.88 
Reported by: Trained Spotter

The storm produced dime to nickel sized hail.

Thunderstorm Wind in MONTGOMERY, KANSAS
From 10-MAY-08 15:40:00 to 10-MAY-08 15:40:00 (CST-6)
Location: CHERRYVALE
Magnitude: 61.00 EG
Reported by: ASOS

The wind gust was measured at the Tri City Airport.

Hail in MONTGOMERY, KANSAS
From 10-MAY-08 15:20:00 to 10-MAY-08 15:20:00 (CST-6)
Location: SYCAMORE
Magnitude: 1.50 
Reported by: Emergency Manager

The hail was driven by estimated 60 mph winds that downed some 11 inch diameter tree limbs.

Hail in NEOSHO, KANSAS
From 10-MAY-08 15:38:00 to 10-MAY-08 15:38:00 (CST-6)
Location: MOREHEAD
Magnitude: 1.25 
Reported by: Law Enforcement

Thunderstorm Wind in MONTGOMERY, KANSAS
From 10-MAY-08 15:20:00 to 10-MAY-08 15:20:00 (CST-6)
Location: SYCAMORE
Magnitude: 52.00 EG
Property damage: 0.20K
Reported by: Emergency Manager

The thunderstorm winds knocked down 11 inch diameter tree limbs.

Hail in LABETTE, KANSAS
From 10-MAY-08 15:39:00 to 10-MAY-08 15:39:00 (CST-6)
Location: DENNIS
Magnitude: 1.00 
Reported by: Law Enforcement

Hail in LABETTE, KANSAS
From 10-MAY-08 15:42:00 to 10-MAY-08 15:42:00 (CST-6)
Location: DENNIS
Magnitude: 1.00 
Reported by: Law Enforcement

Hail in CHAUTAUQUA, KANSAS
From 10-MAY-08 15:30:00 to 10-MAY-08 15:30:00 (CST-6)
Location: SEDAN
Magnitude: 1.75 
Reported by: Broadcast Media

Quarter to golfball sized hail was reported by KAKE-TV storm chaser.

Hail in CHAUTAUQUA, KANSAS
From 10-MAY-08 15:30:00 to 10-MAY-08 15:30:00 (CST-6)
Location: SEDAN
Magnitude: 1.25 
Reported by: Law Enforcement

Hail in WILSON, KANSAS
From 10-MAY-08 15:30:00 to 10-MAY-08 15:30:00 (CST-6)
Location: NEODESHA
Magnitude: 1.75 
Reported by: Trained Spotter

The hail was also driven by an estimated 50 mph wind.

Hail in MONTGOMERY, KANSAS
From 10-MAY-08 15:34:00 to 10-MAY-08 15:34:00 (CST-6)
Location: CHERRYVALE
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in CHAUTAUQUA, KANSAS
From 10-MAY-08 15:19:00 to 10-MAY-08 15:19:00 (CST-6)
Location: WAUNETA
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in MONTGOMERY, KANSAS
From 10-MAY-08 15:20:00 to 10-MAY-08 15:20:00 (CST-6)
Location: SYCAMORE
Magnitude: 2.50 
Reported by: Trained Spotter

Hail in MONTGOMERY, KANSAS
From 10-MAY-08 15:21:00 to 10-MAY-08 15:21:00 (CST-6)
Location: SYCAMORE
Magnitude: 2.50 
Reported by: Law Enforcement

Hail in CHAUTAUQUA, KANSAS
From 10-MAY-08 15:23:00 to 10-MAY-08 15:23:00 (CST-6)
Location: SEDAN
Magnitude: 2.50 
Reported by: Law Enforcement

Hail in WILSON, KANSAS
From 10-MAY-08 15:34:00 to 10-MAY-08 15:34:00 (CST-6)
Location: NEODESHA
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in COWLEY, KANSAS
From 10-MAY-08 14:35:00 to 10-MAY-08 14:35:00 (CST-6)
Location: ARKANSAS CITY
Magnitude: 1.00 
Reported by: Emergency Manager

Hail was reported on the north side of the city.

Hail in COWLEY, KANSAS
From 10-MAY-08 14:50:00 to 10-MAY-08 14:50:00 (CST-6)
Location: CAMERON CITY
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in COWLEY, KANSAS
From 10-MAY-08 14:53:00 to 10-MAY-08 14:53:00 (CST-6)
Location: MAPLE CITY
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in COWLEY, KANSAS
From 10-MAY-08 14:59:00 to 10-MAY-08 14:59:00 (CST-6)
Location: DEXTER
Magnitude: 2.50 
Reported by: Emergency Manager

Hail in ELK, KANSAS
From 10-MAY-08 14:59:00 to 10-MAY-08 14:59:00 (CST-6)
Location: ELK FALLS
Magnitude: 2.50 
Reported by: Trained Spotter

Trained spotter reported hail up to the size of tennis balls.

Hail in COWLEY, KANSAS
From 10-MAY-08 15:06:00 to 10-MAY-08 15:06:00 (CST-6)
Location: HOOSER
Magnitude: 1.00 
Reported by: Emergency Manager

The quarter sized hail was covering the ground.

Hail in MONTGOMERY, KANSAS
From 10-MAY-08 15:16:00 to 10-MAY-08 15:16:00 (CST-6)
Location: ELK CITY
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in CHAUTAUQUA, KANSAS
From 10-MAY-08 15:25:00 to 10-MAY-08 15:25:00 (CST-6)
Location: SEDAN
Magnitude: 1.75 
Reported by: Trained Spotter

Tornado in LABETTE, KANSAS
From 10-MAY-08 16:15:00 to 10-MAY-08 16:16:00 (CST-6)
Location: OSWEGO
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tornado touched down briefly in an open field, throwing corn stalk debris into the air.