MESOSCALE DISCUSSION 0520
   NWS STORM PREDICTION CENTER NORMAN OK
   0713 PM CDT SAT APR 18 2009
   
   AREAS AFFECTED...CNTRL KS
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 169...
   
   VALID 190013Z - 190115Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 169
   CONTINUES.
   
   THE THREAT FOR ISOLATED STRONG TO DAMAGING WIND GUSTS AND HAIL WILL
   PERSIST ANOTHER HOUR OR TWO MAINLY OVER SRN KS. HOWEVER...OVERALL
   THREAT IS BECOMING INCREASINGLY MARGINAL.
   
   EARLY THIS EVENING A LINE OF STORMS EXTENDS FROM NEAR SALINA SWD TO
   NEAR ATTICA MOVING EAST. MODEST BUT DEEP ELY STORM RELATIVE INFLOW
   WILL HELP SUSTAIN THE FORWARD PROPAGATING MCS NEXT FEW HOURS. THE
   DOWNSTREAM ATMOSPHERE IS ONLY MARGINALLY UNSTABLE...AND AS THE UPPER
   TROUGH CONTINUES EWD...BELT OF STRONGER MID-UPPER FLOW WILL SHIFT
   EAST OF THIS REGION RESULTING IN A DECREASE IN VERTICAL SHEAR WITH
   TIME. THESE LIMITING FACTORS AND A STABILIZING BOUNDARY LAYER
   SUGGEST THE OVERALL SEVERE THREAT SHOULD BECOME INCREASINGLY
   MARGINAL. GREATEST SHORT TERM SEVERE THREAT MAY BE WITH BOWING
   SEGMENT CURRENTLY MOVING ENEWD THROUGH GRANT COUNTY IN NRN OK. THIS
   ACTIVITY MAY AFFECT SRN PARTS OF SUMNER AND COWLEY COUNTIES WITHIN
   THE HOUR.
   
   ..DIAL.. 04/19/2009
   
   
   ATTN...WFO...TOP...ICT...
   
   LAT...LON   38599691 37589651 36999699 37179766 37879764 38729781
               38599691