WW 320 SEVERE TSTM KS OK 170605Z – 171200Z
URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 320 NWS STORM PREDICTION CENTER NORMAN OK 105 AM CDT MON JUN 17 2013 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTH-CENTRAL AND SOUTHEAST KANSAS OKLAHOMA * EFFECTIVE THIS MONDAY MORNING FROM 105 AM UNTIL 700 AM CDT. * PRIMARY THREATS INCLUDE... SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF CHANUTE KANSAS TO 35 MILES SOUTH OF FORT SILL OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0). 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 319... DISCUSSION...A MATURE BOW ECHO HAS EVOLVED EARLY THIS MORNING ACROSS S-CNTRL KS INTO NWRN OK WITH A FORWARD SYSTEM MOTION OF 35-40 KT. RECENT VAD DATA FROM VANCE AFB INDICATE THAT A 50+ KT REAR INFLOW JET IS PRESENT WHICH WILL COMBINE WITH A STRENGTHENING NOCTURNAL LOW-LEVEL WIND MAXIMUM WITHIN THE INFLOW AIR MASS TO ENHANCE DEEP CONVERGENCE ALONG THE SYSTEM COLD POOL. THIS SHOULD SUPPORT THE CONTINUED SEWD MOTION OF THE MCS WITH AN ATTENDANT RISK FOR MAINLY DAMAGING WINDS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 29035. ...MEAD
via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0320.html
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