949 WWUS9 KMKC 031944 SEL9 WWUS9 KMKC 031939 MKC WW 031939 TXZ000-040200- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 189 STORM PREDICTION CENTER NORMAN OK 239 PM CDT THU MAY 3 2001 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WEST TEXAS EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 300 PM UNTIL 900 PM CDT. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES EITHER SIDE OF A LINE FROM 10 MILES NORTH OF LUBBOCK TEXAS TO 60 MILES SOUTHEAST OF SANDERSON TEXAS. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION... CONTINUE...WW 188... DISCUSSION...STORMS WILL DEVELOP RAPIDLY ALONG AND E OF N/S DRY LINE WHICH EXTENDS SWD FROM SERN NM/TX BORDER TO RIO GRANDE RIVER. AIRMASS E OF DRY LINE HAS BECOME QUITE UNSTABLE WITH CAPES TO 3000 J/KG AND ONLY A WEAK CAP. VEERING SHEAR PROFILES SUPPORT ROTATING STORMS...HOWEVER FAIRLY WEAK DEEP LAYER SHEAR WILL FAVOR PRIMARILY LARGE HAIL AS SEVERE STORMS DEVELOP. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 22020. ...HALES ;334,1004 292,1003 292,1024 334,1025;  949 WWUS9 KMKC 031944 SEL9 WWUS9 KMKC 031939 MKC WW 031939 TXZ000-040200- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 189 STORM PREDICTION CENTER NORMAN OK 239 PM CDT THU MAY 3 2001 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WEST TEXAS EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 300 PM UNTIL 900 PM CDT. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES EITHER SIDE OF A LINE FROM 10 MILES NORTH OF LUBBOCK TEXAS TO 60 MILES SOUTHEAST OF SANDERSON TEXAS. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION... CONTINUE...WW 188... DISCUSSION...STORMS WILL DEVELOP RAPIDLY ALONG AND E OF N/S DRY LINE WHICH EXTENDS SWD FROM SERN NM/TX BORDER TO RIO GRANDE RIVER. AIRMASS E OF DRY LINE HAS BECOME QUITE UNSTABLE WITH CAPES TO 3000 J/KG AND ONLY A WEAK CAP. VEERING SHEAR PROFILES SUPPORT ROTATING STORMS...HOWEVER FAIRLY WEAK DEEP LAYER SHEAR WILL FAVOR PRIMARILY LARGE HAIL AS SEVERE STORMS DEVELOP. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 22020. ...HALES ;334,1004 292,1003 292,1024 334,1025;