MESOSCALE DISCUSSION 0241
   NWS STORM PREDICTION CENTER NORMAN OK
   0311 PM CDT MON MAR 23 2009
   
   AREAS AFFECTED...SRN SD/NEB/CENTRAL AND ERN KS/N CENTRAL OK
   
   CONCERNING...TORNADO WATCH 53...54...
   
   VALID 232011Z - 232145Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 53...54...CONTINUES.
   
   WIDESPREAD THUNDERSTORMS CONTINUE ACROSS WW 53...WITH MORE ISOLATED
   CELLS SWD ACROSS KS AND INTO NRN OK WITHIN WW 54.  SEVERE THREAT
   CONTINUES.
   
   LATEST SURFACE ANALYSIS SHOWS A DRYLINE EXTENDING SSEWD AND THEN SWD
   FROM A LOW OVER CHERRY CO NEB INTO CENTRAL KS/WRN OK.  A WARM FRONT
   EXTENDS ESEWD FROM THE NEB LOW INTO W CENTRAL IA...WITH ROUGHLY THE
   SERN QUARTER OF NEB MARKING THE NRN PERIPHERY OF A DESTABILIZING
   SURFACE WARM SECTOR.  MIXED-LAYER CAPE RANGING FROM ROUGHLY 500 TO
   1000 J/KG EXISTS ACROSS THE WARM SECTOR ATTM...WITH WIDESPREAD
   SHOWERS AND THUNDERSTORMS ACROSS WW 53 NEAR AND N OF THE WARM FRONT.
    MORE ISOLATED STORMS -- WITHIN A N-S BAND -- EXTEND FROM THE SERN
   QUARTER OF NEB INTO N CENTRAL OK...INTO WW 54.  
   
   WHILE MOST STORMS HAVE REMAINED SUB-SEVERE SO FAR THIS AFTERNOON N
   OF THE NEB WARM FRONT...A FEW HAIL REPORTS HAVE BEEN
   RECEIVED...ALONG WITH A BRIEF TORNADO.  A FEW ADDITIONAL HAIL/WIND
   EVENTS HAVE OCCURRED WITHIN THE N-S BAND OF STORMS AHEAD OF THE
   DRYLINE -- WHERE THE GREATER SEVERE THREAT CONTINUES TO EVOLVE.  AS
   THE UPPER SYSTEM CONTINUES ENEWD AND ADDITIONAL
   HEATING/DESTABILIZATION OCCURS ALONG/AHEAD OF THE DRYLINE...EXPECT
   THUNDERSTORMS TO CONTINUE/INCREASE.  WITH STORMS NEARING THE ERN
   EDGE OF WW 53...A NEW WATCH MAY BE REQUIRED ACROSS ERN NEB/SERN SD
   AND INTO WRN IA.
   
   ..GOSS.. 03/23/2009
   
   
   ATTN...WFO...DMX...EAX...TSA...FSD...OAX...TOP...ICT...OUN...
   GID...LBF...DDC...UNR...
   
   LAT...LON   42760054 43189959 43449687 41999526 40029551 37459601
               36049666 36079844 39909804 41529874 42760054