478 WWUS84 KOUN 031759 SPSOKC OKZ004>048-050>052-TXZ083>090-032000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NORMAN OK 100 PM CDT THU MAY 3 2001 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT ACROSS SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS... SOUTHWEST OF A LINE FROM CHEYENNE... TO LAWTON... TO WICHITA FALLS... TO WINDTHORST. LARGE HAIL AND STRONG WINDS WILL BE THE MAIN THREATS. HEAVY RAINFALL ALSO IS POSSIBLE THROUGH TONIGHT ACROSS PORTIONS OF WESTERN NORTH TEXAS AND THE WESTERN THIRD OF OKLAHOMA. AN UPPER LEVEL LOW PRESSURE SYSTEM OVER SOUTHERN UTAH WILL MOVE LITTLE THROUGH EARLY FRIDAY. HOWEVER THIS SYSTEM WILL DRIVE SEVERAL WEAKER DISTURBANCES NORTHEAST ACROSS THE REGION THROUGH TONIGHT. MEANWHILE... A STATIONARY FRONT ACROSS NORTHWEST OKLAHOMA... EXTENDING SOUTHWEST INTO WEST CENTRAL TEXAS... MAY DRIFT SLOWLY NORTH LATE THIS AFTERNOON AND TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO TONIGHT AS THE UPPER AIR DISTURBANCES INTERACT WITH ABUNDANT LOW AND MID LEVEL MOISTURE OVER THE AREA... AND WITH THE FRONT ACROSS NORTHWEST OKLAHOMA. THUNDERSTORMS WILL BE MOST NUMEROUS OVER WESTERN OKLAHOMA AND WESTERN NORTH TEXAS. SHOWERS AND THUNDERSTORMS THROUGH MIDDAY HAVE RESULTED IN MOSTLY CLOUDY SKIES OVER A LARGE PART OF THE SOUTHERN PLAINS. HOWEVER... BREAKS IN THE CLOUD COVER OVER PORTIONS OF WESTERN NORTH TEXAS AND SOUTHWEST TEXAS MAY ALLOW ENOUGH HEATING FOR THE LOW LEVELS OF THE ATMOSPHERE TO BECOME MORE UNSTABLE DURING THE AFTERNOON. THEREFORE... ISOLATED SEVERE THUNDERSTORMS WITH LARGE HAIL AND STRONG WINDS WILL BE POSSIBLE IN THESE AREAS. LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE. THE BEST CHANCES FOR HEAVY RAIN WILL BE NEAR THE STATIONARY FRONT WHICH COULD PROVIDE A FOCUS FOR THUNDERSTORM DEVELOPMENT. SCATTERED THUNDERSTORMS WILL ALSO OCCUR OVER PORTIONS OF CENTRAL AND NORTHERN OKLAHOMA THROUGH TONIGHT. ALTHOUGH A FEW OF THESE STORMS COULD BECOME MARGINALLY SEVERE FOR A BRIEF TIME... THE PRESENCE OF WEAKER INSTABILITIES OVER THE AREA WILL REDUCE THE LIKELIHOOD OF MORE SIGNIFICANT SEVERE STORMS. THE MAIN UPPER STORM SYSTEM WILL BEGIN MOVING EAST LATE FRIDAY... AND WILL MOVE INTO THE AREA ON SATURDAY. THE CHANCE OF THUNDERSTORMS... INCLUDING POSSIBLE SEVERE WEATHER AND LOCALLY HEAVY RAIN... WILL CONTINUE UNTIL THE SYSTEM MOVES EAST OF THE AREA SATURDAY NIGHT OR SUNDAY. && EMERGENCY MANAGERS AND SPOTTER GROUPS IN SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS SHOULD BE PREPARED FOR POSSIBLE SEVERE WEATHER OPERATIONS THIS AFTERNOON THROUGH TONIGHT. CJS  478 WWUS84 KOUN 031759 SPSOKC OKZ004>048-050>052-TXZ083>090-032000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NORMAN OK 100 PM CDT THU MAY 3 2001 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT ACROSS SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS... SOUTHWEST OF A LINE FROM CHEYENNE... TO LAWTON... TO WICHITA FALLS... TO WINDTHORST. LARGE HAIL AND STRONG WINDS WILL BE THE MAIN THREATS. HEAVY RAINFALL ALSO IS POSSIBLE THROUGH TONIGHT ACROSS PORTIONS OF WESTERN NORTH TEXAS AND THE WESTERN THIRD OF OKLAHOMA. AN UPPER LEVEL LOW PRESSURE SYSTEM OVER SOUTHERN UTAH WILL MOVE LITTLE THROUGH EARLY FRIDAY. HOWEVER THIS SYSTEM WILL DRIVE SEVERAL WEAKER DISTURBANCES NORTHEAST ACROSS THE REGION THROUGH TONIGHT. MEANWHILE... A STATIONARY FRONT ACROSS NORTHWEST OKLAHOMA... EXTENDING SOUTHWEST INTO WEST CENTRAL TEXAS... MAY DRIFT SLOWLY NORTH LATE THIS AFTERNOON AND TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO TONIGHT AS THE UPPER AIR DISTURBANCES INTERACT WITH ABUNDANT LOW AND MID LEVEL MOISTURE OVER THE AREA... AND WITH THE FRONT ACROSS NORTHWEST OKLAHOMA. THUNDERSTORMS WILL BE MOST NUMEROUS OVER WESTERN OKLAHOMA AND WESTERN NORTH TEXAS. SHOWERS AND THUNDERSTORMS THROUGH MIDDAY HAVE RESULTED IN MOSTLY CLOUDY SKIES OVER A LARGE PART OF THE SOUTHERN PLAINS. HOWEVER... BREAKS IN THE CLOUD COVER OVER PORTIONS OF WESTERN NORTH TEXAS AND SOUTHWEST TEXAS MAY ALLOW ENOUGH HEATING FOR THE LOW LEVELS OF THE ATMOSPHERE TO BECOME MORE UNSTABLE DURING THE AFTERNOON. THEREFORE... ISOLATED SEVERE THUNDERSTORMS WITH LARGE HAIL AND STRONG WINDS WILL BE POSSIBLE IN THESE AREAS. LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE. THE BEST CHANCES FOR HEAVY RAIN WILL BE NEAR THE STATIONARY FRONT WHICH COULD PROVIDE A FOCUS FOR THUNDERSTORM DEVELOPMENT. SCATTERED THUNDERSTORMS WILL ALSO OCCUR OVER PORTIONS OF CENTRAL AND NORTHERN OKLAHOMA THROUGH TONIGHT. ALTHOUGH A FEW OF THESE STORMS COULD BECOME MARGINALLY SEVERE FOR A BRIEF TIME... THE PRESENCE OF WEAKER INSTABILITIES OVER THE AREA WILL REDUCE THE LIKELIHOOD OF MORE SIGNIFICANT SEVERE STORMS. THE MAIN UPPER STORM SYSTEM WILL BEGIN MOVING EAST LATE FRIDAY... AND WILL MOVE INTO THE AREA ON SATURDAY. THE CHANCE OF THUNDERSTORMS... INCLUDING POSSIBLE SEVERE WEATHER AND LOCALLY HEAVY RAIN... WILL CONTINUE UNTIL THE SYSTEM MOVES EAST OF THE AREA SATURDAY NIGHT OR SUNDAY. && EMERGENCY MANAGERS AND SPOTTER GROUPS IN SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS SHOULD BE PREPARED FOR POSSIBLE SEVERE WEATHER OPERATIONS THIS AFTERNOON THROUGH TONIGHT. CJS