URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 147 NWS STORM PREDICTION CENTER NORMAN OK 125 PM CDT MON MAY 10 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTH CENTRAL KANSAS CENTRAL AND WESTERN OKLAHOMA EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 125 PM UNTIL 1000 PM CDT. ...THIS IS A PARTICULARLY DANGEROUS SITUATION... DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 INCHES IN DIAMETER... THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTH SOUTHEAST OF FORT SILL OKLAHOMA TO 25 MILES NORTH NORTHEAST OF WICHITA KANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7). REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND 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. OTHER WATCH INFORMATION...CONTINUE...WW 146... DISCUSSION...AN DANGEROUS ENVIRONMENT IS DEVELOPING ACROSS PARTS OF SOUTHERN KS AND WESTERN/CENTRAL OK THIS AFTERNOON AS AIRMASS RAPIDLY DESTABILIZES AND UPPER TROUGH APPROACHES. THUNDERSTORMS ARE EXPECTED TO INITIALLY DEVELOP ALONG THE SURFACE DRYLINE OVER WESTERN OK...THEN PROGRESSING EASTWARD THROUGH THE LATE AFTERNOON AND EVENING. TORNADIC SUPERCELLS ARE A DISTINCT POSSIBILITY WITH THE THREAT OF STRONG AND LONG-TRACK TORNADOES. VERY LARGE HAIL IS ALSO LIKELY IN THE STRONGER CELLS. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 25045. ...HART