Two boundaries moved into/toward Oklahoma during the day on the 6th. A dry line moved slowly east into parts of central Oklahoma, and a cold front moved south out of Kansas. A strong cap was in place for much of the day, and any attempt for thunderstorm development failed into later in the evening. The cold front began to overtake the dry line from north to south after dark. This combined with a weakening cap allowed for thunderstorms to develop from parts of north central Oklahoma into southern Oklahoma. The thunderstorms became severe with marginally severe hail and heavy rain reported. The hail size occasionally grew as large as golf-ball size, but hail sizes averaged quarter to half-dollar size. The storms moved into southeast Oklahoma shortly after midnight, but the severe thunderstorm threat had ended.

Hail in JEFFERSON, OKLAHOMA
From 06-APR-10 22:35:00 to 06-APR-10 22:35:00 (CST-6)
Location: WAURIKA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CLEVELAND, OKLAHOMA
From 06-APR-10 21:38:00 to 06-APR-10 21:38:00 (CST-6)
Location: NORMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in STEPHENS, OKLAHOMA
From 06-APR-10 21:53:00 to 06-APR-10 21:53:00 (CST-6)
Location: CORUM
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The report was relayed by KSWO-7 in Lawton.

Hail in STEPHENS, OKLAHOMA
From 06-APR-10 22:22:00 to 06-APR-10 22:22:00 (CST-6)
Location: VELMA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in POTTAWATOMIE, OKLAHOMA
From 06-APR-10 22:40:00 to 06-APR-10 22:40:00 (CST-6)
Location: TECUMSEH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Brief power outages were reported throughout town.

Hail in SEMINOLE, OKLAHOMA
From 06-APR-10 22:55:00 to 06-APR-10 22:55:00 (CST-6)
Location: SEMINOLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A wind gust of 50 mph accompanied the hail.

Hail in MCCLAIN, OKLAHOMA
From 06-APR-10 21:20:00 to 06-APR-10 21:20:00 (CST-6)
Location: GOLDSBY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in CLEVELAND, OKLAHOMA
From 06-APR-10 21:33:00 to 06-APR-10 21:33:00 (CST-6)
Location: NORMAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in CLEVELAND, OKLAHOMA
From 06-APR-10 21:58:00 to 06-APR-10 21:58:00 (CST-6)
Location: NOBLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Wind gusts to 50 mph were also reported at this location.

Hail in STEPHENS, OKLAHOMA
From 06-APR-10 23:10:00 to 06-APR-10 23:10:00 (CST-6)
Location: SUNRAY
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in CANADIAN, OKLAHOMA
From 06-APR-10 20:40:00 to 06-APR-10 20:40:00 (CST-6)
Location: PIEDMONT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in NOBLE, OKLAHOMA
From 06-APR-10 20:42:00 to 06-APR-10 20:42:00 (CST-6)
Location: RED ROCK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LOGAN, OKLAHOMA
From 06-APR-10 20:45:00 to 06-APR-10 20:45:00 (CST-6)
Location: GUTHRIE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in LOGAN, OKLAHOMA
From 06-APR-10 21:09:00 to 06-APR-10 21:09:00 (CST-6)
Location: GUTHRIE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in MCCLAIN, OKLAHOMA
From 06-APR-10 21:22:00 to 06-APR-10 21:22:00 (CST-6)
Location: BLANCHARD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LOGAN, OKLAHOMA
From 06-APR-10 21:25:00 to 06-APR-10 21:25:00 (CST-6)
Location: MERIDIAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LOGAN, OKLAHOMA
From 06-APR-10 20:45:00 to 06-APR-10 20:45:00 (CST-6)
Location: MULHALL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in LOGAN, OKLAHOMA
From 06-APR-10 20:59:00 to 06-APR-10 20:59:00 (CST-6)
Location: GUTHRIE
Magnitude: 1.75 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The hail cracked the windshield of a fire truck. Monetary damages were estimated.

Hail in LOGAN, OKLAHOMA
From 06-APR-10 20:35:00 to 06-APR-10 20:35:00 (CST-6)
Location: CRESCENT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in PAYNE, OKLAHOMA
From 06-APR-10 21:08:00 to 06-APR-10 21:08:00 (CST-6)
Location: LAKE CARL BLACKWELL DAM
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager