MESOSCALE DISCUSSION 1071
   NWS STORM PREDICTION CENTER NORMAN OK
   0623 AM CDT FRI JUN 12 2009
   
   AREAS AFFECTED...SRN KS...NRN OK
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 386...
   
   VALID 121123Z - 121230Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 386
   CONTINUES.
   
   THE SEVERE THREAT WITH A LINE-SEGMENT IN THE NWRN PART OF WW 386
   WILL LIKELY CONTINUE FOR SEVERAL MORE HOURS THIS MORNING. LARGE HAIL
   AND ISOLATED WIND DAMAGE WILL BE POSSIBLE WITH THE LINE WHICH WILL
   GRADUALLY MOVE INTO NRN OK. NEW WW MAY BECOME NECESSARY SOUTHEAST OF
   WW 386 LATER THIS MORNING.
   
   A LINEAR CONVECTIVE SYSTEM IN SRN KS AND NW OK IS LOCATED ON THE
   NOSE OF A 30-40 KT LOW-LEVEL JET JUST NORTHEAST OF A FRONTAL
   BOUNDARY EXTENDING SEWD INTO CNTRL OK. FORECAST SOUNDINGS IN NW OK
   SUGGEST MUCAPE VALUES AROUND 2000 J/KG EXIST ON THE NORTH SIDE OF
   THE BOUNDARY. IN ADDITION...EFFECTIVE SHEAR VALUES ARE ESTIMATED
   ABOVE 60 KT SUGGESTING THE ENVIRONMENT WILL CONTINUE TO SUPPORT A
   SEVERE THREAT THIS MORNING AS THE LINE MOVES INTO NRN OK. STEEP
   LAPSE RATES IN THE 700 TO 500 MB LAYER WILL BE FAVORABLE FOR HAIL. A
   FEW DAMAGING WIND GUSTS WILL BE POSSIBLE ESPECIALLY IF THE LINE CAN
   PERSIST AS A BOWING STRUCTURE.
   
   ..BROYLES.. 06/12/2009
   
   
   ATTN...WFO...LZK...SGF...TSA...ICT...OUN...DDC...
   
   LAT...LON   38389845 38369675 37339496 36419284 35459221 34959270
               34749314 35219554 35849764 36659936 37019975 37669909
               38389845