PUBLIC SEVERE WEATHER OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0359 AM CST FRI FEB 23 2007 ...SEVERE THUNDERSTORMS EXPECTED OVER PARTS OF THE SOUTHERN HIGH PLAINS THIS AFTERNOON AND TONIGHT... THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE DEVELOPMENT OF TORNADOES...LARGE HAIL AND DAMAGING WINDS OVER PARTS OF THE SOUTHERN PLAINS THIS AFTERNOON AND TONIGHT. THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE SOUTH-CENTRAL KANSAS WESTERN OKLAHOMA NORTHWEST TEXAS INCLUDING THE EASTERN PANHANDLE SURROUNDING THIS AREA...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM FROM CENTRAL NEBRASKA INTO CENTRAL TX. A POWERFUL UPPER TROUGH LOCATED THIS MORNING OVER CALIFORNIA IS FORECAST TO ROTATE EASTWARD AND APPROACH THE SOUTHERN PLAINS BY THIS EVENING. STRONG SOUTHERLY LOW LEVEL WINDS AHEAD OF THE SYSTEM WILL HELP TRANSPORT GULF MOISTURE NORTHWARD INTO MUCH OF KANSAS... OKLAHOMA...AND NORTH TEXAS. WIDESPREAD LOW CLOUDS AND SCATTERED SHOWERS ARE LIKELY ACROSS THE RISK AREA FOR MUCH OF THE DAY...LIMITING DAYTIME HEATING AND OVERALL DESTABILIZATION. HOWEVER...COOLING TEMPERATURES IN THE MIDDLE ATMOSPHERE WILL DESTABILIZE THE AIR MASS BY AROUND DARK...LEADING TO ISOLATED THUNDERSTORM DEVELOPMENT ALONG THE DRYLINE FROM SOUTHWEST KANSAS INTO WEST TEXAS. PRESENT INDICATIONS ARE THAT INITIAL THUNDERSTORM COVERAGE WILL BE QUITE LIMITED. HOWEVER...THOSE STORMS THAT DO FORM WILL HAVE THE POTENTIAL FOR VERY LARGE HAIL...DAMAGING WINDS...AND TORNADOES. STORMS WILL LIKELY INCREASE IN INTENSITY AND COVERAGE THROUGH THE OVERNIGHT HOURS AS THEY MOVE EASTWARD ACROSS PARTS OF OKLAHOMA AND NORTH TEXAS. THOSE IN THE THREATENED AREA ARE URGED TO REVIEW SEVERE WEATHER SAFETY RULES AND TO LISTEN TO RADIO...TELEVISION...AND NOAA WEATHER RADIO FOR POSSIBLE WATCHES...WARNINGS...AND STATEMENTS LATER TODAY. ..HART.. 02/23/2007