MESOSCALE DISCUSSION 0690
   NWS STORM PREDICTION CENTER NORMAN OK
   1140 PM CDT SAT MAY 18 2013
   
   AREAS AFFECTED...SERN NEB / NERN KS
   
   CONCERNING...TORNADO WATCH 174...
   
   VALID 190440Z - 190515Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 174 CONTINUES.
   
   SUMMARY...TORNADO WATCH 174 CAN BE CANCELLED PRIOR TO THE 0800 UTC
   EXPIRATION TIME AND COUNTIES CAN BE CLEARED FROM THE WATCH
   CONCURRENT WITH SQUALL LINE PASSAGE.
   
   DISCUSSION...RADAR MOSAIC SHOWS A FRACTURING QLCS FROM PARTS OF NERN
   KS INTO SERN NEB.  THE REMAINING SEVERE THREAT IS LIKELY CONFINED ON
   THE IMMEDIATE ERN EDGE OF THE WATCH OVER POTTAWATOMIE COUNTY KS AND
   PERHAPS FARTHER NE IN MARSHALL COUNTY KS AND GAGE COUNTY NE FOR THE
   NEXT 15-30 MINUTES.  OTHERWISE...THE WELL-DEVELOPED COMMA HEAD/NRN
   BOOK-END VORTEX WILL BECOME INCREASINGLY DISPLACED FROM
   SURFACE-BASED INFLOW...EFFECTIVELY WEAKENING IT OVER THE NEXT HOUR
   OR SO.
   
   ..SMITH.. 05/19/2013
   
   
   ATTN...WFO...OAX...TOP...ICT...GID...
   
   LAT...LON   38539709 41119737 41359705 39769616 38579633 38539709