A warm front lifted north out of the northern Texas during the afternoon hours of the 10th. Also, an upper level disturbance moved out of the Rocky and moved over Oklahoma and a dry line approached from the Texas panhandle. Scattered strong to severe thunderstorms developed over central and south central Oklahoma and moved east during the late afternoon and early evening hours. A strong supercell thunderstorm moved over southern Grady county and moved east. Another supercell developed farther north over McClain county, also moving east. Both of these thunderstorms had large hail to the size of golfballs, and wind gusts near 60 mph.

Hail in GRADY, OKLAHOMA
From 10-APR-07 18:02:00 to 10-APR-07 18:02:00 (CST-6)
Location: RUSH SPRINGS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in STEPHENS, OKLAHOMA
From 10-APR-07 18:02:00 to 10-APR-07 18:02:00 (CST-6)
Location: MARLOW
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in STEPHENS, OKLAHOMA
From 10-APR-07 18:25:00 to 10-APR-07 18:25:00 (CST-6)
Location: VELMA
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in PONTOTOC, OKLAHOMA
From 10-APR-07 19:30:00 to 10-APR-07 19:30:00 (CST-6)
Location: ADA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in JOHNSTON, OKLAHOMA
From 10-APR-07 19:40:00 to 10-APR-07 19:40:00 (CST-6)
Location: TISHOMINGO
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in STEPHENS, OKLAHOMA
From 10-APR-07 18:03:00 to 10-APR-07 18:03:00 (CST-6)
Location: MARLOW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in STEPHENS, OKLAHOMA
From 10-APR-07 18:08:00 to 10-APR-07 18:08:00 (CST-6)
Location: BRAY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in CLEVELAND, OKLAHOMA
From 10-APR-07 18:50:00 to 10-APR-07 18:50:00 (CST-6)
Location: NORMAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Reported on west side of town.

Hail in CLEVELAND, OKLAHOMA
From 10-APR-07 18:58:00 to 10-APR-07 18:58:00 (CST-6)
Location: NORMAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PONTOTOC, OKLAHOMA
From 10-APR-07 19:10:00 to 10-APR-07 19:10:00 (CST-6)
Location: VANOSS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in GRADY, OKLAHOMA
From 10-APR-07 19:08:00 to 10-APR-07 19:08:00 (CST-6)
Location: TABLER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in GARVIN, OKLAHOMA
From 10-APR-07 18:25:00 to 10-APR-07 18:25:00 (CST-6)
Location: PAOLI
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in STEPHENS, OKLAHOMA
From 10-APR-07 18:31:00 to 10-APR-07 18:31:00 (CST-6)
Location: LAKE FUQUA  DAM
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in COMANCHE, OKLAHOMA
From 10-APR-07 17:24:00 to 10-APR-07 17:24:00 (CST-6)
Location: LAKE ELLSWORTH DAM
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in COMANCHE, OKLAHOMA
From 10-APR-07 17:26:00 to 10-APR-07 17:26:00 (CST-6)
Location: FLETCHER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio