Tornado Warning western Garvin County in southern Oklahoma... northern Stephens County in southern Oklahoma... extreme southeastern Grady County in central Oklahoma... extreme northwestern Carter County in southern Oklahoma...

 242 PM CDT Mon may 20 2013 

The National Weather Service in Norman has issued a 

* Tornado Warning for... 
western Garvin County in southern Oklahoma... 
northern Stephens County in southern Oklahoma... 
extreme southeastern Grady County in central Oklahoma... 
extreme northwestern Carter County in southern Oklahoma... 

* until 315 PM CDT 

* at 237 PM CDT...National Weather Service meteorologists detected a 
severe thunderstorm capable of producing a tornado. This dangerous 
storm was located 5 miles southwest of Bray...and moving east at 30 
mph. A rapidly rotating wall cloud has been reported with this storm.