MESOSCALE DISCUSSION 0728
   NWS STORM PREDICTION CENTER NORMAN OK
   0231 PM CDT MON MAY 20 2013
   
   AREAS AFFECTED...CNTRL INTO NERN OK AND SERN KS
   
   CONCERNING...TORNADO WATCH 190...191...
   
   VALID 201931Z - 202130Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 190...191...CONTINUES.
   
   SUMMARY...THE THREAT FOR TORNADOES MAY BE INCREASING OVER THE NEXT
   FEW HOURS...ESPECIALLY ACROSS NERN OK.
   
   DISCUSSION...STORMS ARE GRADUALLY FORMING ALONG THE FRONT FROM NWRN
   TX ACROSS OK AND INTO SERN KS. SPECIAL SOUNDINGS ACROSS THE
   AREA...AS WELL AS PROFILER DATA INDICATE A VEER-BACK PATTERN BETWEEN
   850 AND 700 MB ESPECIALLY FROM NRN TX INTO SRN OK. THIS WEAKNESS IN
   THE HODOGRAPH MAY INHIBIT THE DEVELOPMENT OF ROBUST ROTATION UNTIL
   LATER IN THE AFTERNOON.
   
   HOWEVER...IN THE SHORT TERM...WIND PROFILES CURRENTLY APPEAR TO BE
   MORE FAVORABLE FOR ROTATION FROM CNTRL/NERN OK INTO SERN KS...WITH
   0-1 SRH OF 100-150 M2/S2. IN ADDITION...CLEARING HAS ALLOWED FOR A
   ROBUST CU FIELD GENERALLY E OF I-35 AND N OF I-40...WHERE THICK
   STRATUS PREVIOUSLY EXISTED. DEEP LAYER SHEAR AND EXTREME INSTABILITY
   PROFILES WILL FAVOR RAPID INTENSIFICATION AND STORMS MAY CHANGE
   CHARACTER QUICKLY AS THEY TRAVEL NEWD ACROSS A VERY MOIST WARM
   SECTOR WITH LOCALLY BACKED SFC WINDS.
   
   ..JEWELL.. 05/20/2013
   
   
   ATTN...WFO...SGF...TSA...ICT...OUN...
   
   LAT...LON   36309535 35429621 35279718 35409773 35589777 36059737
               36699692 37239672 37909590 37989537 37839501 37409478
               36949491 36309535