MESOSCALE DISCUSSION 1607
   NWS STORM PREDICTION CENTER NORMAN OK
   0732 PM CDT FRI JUL 17 2009
   
   AREAS AFFECTED...EASTERN CO/FAR WESTERN KS
   
   CONCERNING...TORNADO WATCH 596...598...
   
   VALID 180032Z - 180130Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 596...598...CONTINUES.
   
   TORNADO WATCH 598 CONTINUES UNTIL 03Z. TORNADO WATCH 596 IS
   SCHEDULED TO EXPIRE AT 01Z...AND SOME CONSIDERATION FOR A NEW
   WATCH/LOCAL WFO EXTENSION COULD BE NEEDED FOR NORTHEAST CO/PERHAPS
   FAR WESTERN KS.
   
   MUCH OF NORTHEAST CO INTO THE NEB PANHANDLE APPEARS TO BE
   CONVECTIVELY OVERTURNED/STABILIZED FROM PRIOR CONVECTION/OUTFLOWS.
   HOWEVER A SEVERE HAIL/POSSIBLE TORNADO THREAT COULD CONTINUE BEYOND
   01Z ACROSS FAR NORTHEAST CO AND PERHAPS EVEN ADJACENT WESTERN KS AS
   STORMS CONTINUE TO DEVELOP GENERALLY SOUTHWARD AMIDST A STRONGLY
   SHEARED ENVIRONMENT BENEATH NORTHWESTERLY FLOW ALOFT.
   OTHERWISE...PRIMARY LARGE HAIL/ISOLATED TORNADO THREAT WILL CONTINUE
   ACROSS WW 598 IN SOUTHEAST CO...CHIEFLY WITH A
   LONG-LIVED/SOUTHWESTWARD MOVING SUPERCELL CROSSING THE ARKANSAS
   RIVER VALLEY NEAR/WEST OF LAMAR AS OF 0015Z.
   
   ..GUYER.. 07/18/2009
   
   
   ATTN...WFO...LBF...DDC...GLD...PUB...BOU...CYS...
   
   LAT...LON   41540350 41370255 40120154 38800139 37220250 37520411
               39580352 40770409 41540350