356 WWUS9 KMKC 022048 SEL7 MKC WW 022041 OKZ000-TXZ000-030200- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 187 STORM PREDICTION CENTER NORMAN OK 341 PM CDT WED MAY 2 2001 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WESTERN OKLAHOMA NORTHWEST TEXAS EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 415 PM UNTIL 900 PM CDT. HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 45 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTH SOUTHWEST OF CHILDRESS TEXAS TO 65 MILES NORTHEAST OF GAGE OKLAHOMA. 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. DISCUSSION...A THUNDERSTORM HAS DEVELOPED WEST OF CDS...AND OTHER DEEP CONVECTION IS LIKELY TO DEVELOP DURING THE NEXT 1-2 HOURS ALONG A LINE OF CU/TCU EXTENDING NNEWD INTO NWRN OK. AIR MASS ALONG AND EAST OF THE CONVERGENCE LINE IS VERY UNSTABLE WITH SBCAPE TO 3500 J/KG. ALTHOUGH WINDS ALOFT ARE NOT PARTICULARLY STRONG...VERTICAL SHEAR IS SUFFICIENT ALONG THE SERN EDGE OF STRONGER FLOW ALOFT TO AID CONVECTIVE ORGANIZATION. VERY LARGE HAIL AND DAMAGING WIND GUSTS WILL BE THE MOST LIKELY THREATS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 22025. ...WEISS ;365,0980 334,0994 334,1012 365,0994;  356 WWUS9 KMKC 022048 SEL7 MKC WW 022041 OKZ000-TXZ000-030200- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 187 STORM PREDICTION CENTER NORMAN OK 341 PM CDT WED MAY 2 2001 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WESTERN OKLAHOMA NORTHWEST TEXAS EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 415 PM UNTIL 900 PM CDT. HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 45 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTH SOUTHWEST OF CHILDRESS TEXAS TO 65 MILES NORTHEAST OF GAGE OKLAHOMA. 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. DISCUSSION...A THUNDERSTORM HAS DEVELOPED WEST OF CDS...AND OTHER DEEP CONVECTION IS LIKELY TO DEVELOP DURING THE NEXT 1-2 HOURS ALONG A LINE OF CU/TCU EXTENDING NNEWD INTO NWRN OK. AIR MASS ALONG AND EAST OF THE CONVERGENCE LINE IS VERY UNSTABLE WITH SBCAPE TO 3500 J/KG. ALTHOUGH WINDS ALOFT ARE NOT PARTICULARLY STRONG...VERTICAL SHEAR IS SUFFICIENT ALONG THE SERN EDGE OF STRONGER FLOW ALOFT TO AID CONVECTIVE ORGANIZATION. VERY LARGE HAIL AND DAMAGING WIND GUSTS WILL BE THE MOST LIKELY THREATS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 22025. ...WEISS ;365,0980 334,0994 334,1012 365,0994;