MESOSCALE DISCUSSION 0240
   NWS STORM PREDICTION CENTER NORMAN OK
   0531 PM CDT WED APR 08 2015

   AREAS AFFECTED...CENTRAL AND SOUTH CENTRAL KS

   CONCERNING...TORNADO WATCH 36...

   VALID 082231Z - 082330Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 36 CONTINUES.

   SUMMARY...TORNADO WATCH 36 WILL NEED TO BE EXTENDED NW 1-2 TIERS OF
   COUNTIES IN KS TO REFLECT NWD PROGRESS OF THE SURFACE WARM FRONT AND
   ASSOCIATED SEVERE/TORNADO RISK.

   DISCUSSION...SURFACE OBS...RADAR...AND SATELLITE IMAGERY ALL SUGGEST
   THE WARM FRONT IS MOVING NWD FROM S CENTRAL TOWARD CENTRAL KS...IN
   RESPONSE TO HIGH PLAINS CYCLOGENESIS AND THE APPROACH OF BOTH A SRN
   HIGH PLAINS SPEED MAX...AND THE MAIN SYNOPTIC TROUGH OVER WRN CO. 
   NWD MOTION OF THE WARM FRONT WILL BRING THE SURFACE WARM SECTOR N OF
   THE ORIGINAL WATCH BORDER...AND LOW-LEVEL SHEAR WILL INCREASE THIS
   EVENING ALONG THE BOUNDARY.  THUS...THE SEVERE/TORNADO RISK WILL
   LIKEWISE SPREAD NWD...NECESSITATING A NWD EXPANSION OF THE WATCH BY
   1-2 TIERS OF COUNTIES IN KS.

   ..THOMPSON.. 04/08/2015


   ATTN...WFO...ICT...DDC...

   LAT...LON   38369776 38529701 38509657 38309654 37829730 37289868
               37199928 37309944 37699901 38119839 38369776