WWUS20 KWNS 050242 SEL8 SPC WW 050242 KSZ000-OKZ000-051000- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 278 NWS STORM PREDICTION CENTER NORMAN OK 940 PM CDT TUE JUN 4 2013 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF CENTRAL AND SOUTHERN KANSAS NORTHWESTERN AND NORTH CENTRAL OKLAHOMA * EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 940 PM UNTIL 500 AM CDT. * PRIMARY THREATS INCLUDE... NUMEROUS DAMAGING WIND GUSTS LIKELY WITH A FEW SIGNIFICANT GUSTS TO 80 MPH POSSIBLE SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE A FEW TORNADOES POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 100 STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHWEST OF HUTCHINSON KANSAS TO 35 MILES WEST OF OKLAHOMA CITY OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 276...WW 277... DISCUSSION...FURTHER UPSCALE GROWTH OF THE ONGOING SEVERE MESOSCALE CONVECTIVE SYSTEM ACROSS THE CENTRAL HIGH PLAINS IS EXPECTED DURING THE NEXT FEW HOURS. AIDED BY WEAK TO MODEST WESTERLY DEEP LAYER MEAN FLOW...ACTIVITY MAY ACCELERATE EASTWARD ALONG A FRONT NEAR/SOUTH OF THE INTERSTATE 70 CORRIDOR OF KANSAS...WHILE ALSO DEVELOPING SOUTHWARD INTO A STRENGTHENING SOUTHERLY LOW-LEVEL JET...TOWARD CENTRAL OKLAHOMA. STRONG STRAIGHT LINE WIND GUSTS ARE EXPECTED TO BECOME THE PREDOMINANT SEVERE WEATHER THREAT...BUT ONE OR TWO TORNADOES MAY NOT BE OUT OF THE QUESTION...IN ADDITION TO THE CONTINUING RISK FOR SEVERE HAIL. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 29035. ...KERR