MESOSCALE DISCUSSION 0369
   NWS STORM PREDICTION CENTER NORMAN OK
   0811 PM CDT SAT APR 18 2015

   AREAS AFFECTED...SCNTRL NEBRASKA...KS

   CONCERNING...SEVERE THUNDERSTORM WATCH 74...

   VALID 190111Z - 190215Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 74
   CONTINUES.

   SUMMARY...SEVERE THREAT WILL CONCENTRATE ACROSS SOUTH CENTRAL KS
   OVER THE NEXT FEW HOURS.

   DISCUSSION...AN EXPANSIVE AREA OF CONVECTION HAS OVERTURNED AIR MASS
   ACROSS THE CNTRL PLAINS.  STRONGEST TSTMS ARE NOW FOCUSED ALONG THE
   KS/OK BORDER AND THESE STORMS ARE PROPAGATING SLOWLY ENEWD.  LATEST
   DIAGNOSTIC DATA SUGGESTS A PLUME OF YET-TO-BE OVERTURNED INSTABILITY
   EXTENDS ACROSS NCNTRL OK INTO SERN KS.  FOR THIS REASON IT MAY BE
   NECESSARY TO CONTINUE WW74 LOCALLY...OR PERHAPS EVEN EXTEND WATCH TO
   INCLUDE COWLEY/BUTLER/CHAUTAUQUA COUNTIES BEYOND 02Z.

   ..DARROW.. 04/19/2015


   ATTN...WFO...TOP...ICT...OUN...GID...LBF...DDC...GLD...

   LAT...LON   36949982 41040032 41059802 36959766 36949982