This just in from the National Weather Service, Fort Worth:

A powerful upper level storm system will approach the region Saturday and bring a chance of severe thunderstorms during the afternoon and evening....generally from Oklahoma through Nebraska. Thunderstorms will move into North Texas after midnight with storm chances increasing from west to east through the day Sunday. Some storms may be severe with large hail...damaging winds and isolated tornadoes. Most storms should move into East Texas Sunday evening.

HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FORT WORTH TX 426 AM CDT SAT APR 14 2012 TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-150930- MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN- HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS- ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL- JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO- FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE- LEON-MILAM-ROBERTSON- 426 AM CDT SAT APR 14 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS. .DAY ONE...TODAY AND TONIGHT. A WIND ADVISORY WILL BE IN EFFECT FROM 9 AM TO 7 PM TODAY. SUSTAINED WIND SPEEDS WILL EXCEED 25 MPH AT TIMES...WITH SOME GUSTS TO 40 MPH. THERE IS A CHANCE OF THUNDERSTORMS TONIGHT FOR AREAS GENERALLY WEST OF A PARIS TO HEARNE LINE. SOME STORMS MAY BE SEVERE...MAINLY AFTER MIDNIGHT OVER AREAS NORTHWEST OF A LINE FROM PARIS TO TEMPLE. LARGE HAIL AND DAMAGING WINDS WILL BE THE PRIMARY HAZARDS...ALTHOUGH AN ISOLATED TORNADO MAY ALSO OCCUR. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THUNDERSTORMS WILL SPREAD EAST ACROSS NORTH TEXAS SUNDAY. SOME STORMS COULD BE SEVERE...WITH LARGE HAIL...DAMAGING WINDS AND ISOLATED TORNADOES AGAIN POSSIBLE. THE THE THREAT FOR SEVERE WEATHER WILL SHIFT EAST OF THE I-35/35 EAST CORRIDOR SUNDAY AFTERNOON. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS ACROSS MOST OF NORTH TEXAS FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUESTED LATE TONIGHT FOR COUNTIES NORTHWEST OF A PARIS TO TEMPLE LINE.