MESOSCALE DISCUSSION 0748
   NWS STORM PREDICTION CENTER NORMAN OK
   0751 PM CDT WED MAY 11 2011
   
   AREAS AFFECTED...NORTHEAST CO/NORTHWEST KS/SOUTHERN NEB
   
   CONCERNING...TORNADO WATCH 285...
   
   VALID 120051Z - 120215Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 285 CONTINUES.
   
   TORNADO WATCH 285 CONTINUES UNTIL 06Z. THE POTENTIAL FOR A /MAINLY
   BRIEF/ TORNADO CONTINUES OVER THE NEXT HOUR OR TWO...BUT THE
   POTENTIAL FOR SEVERE HAIL WILL BE THE PRIMARY HAZARD.
   
   SCATTERED TSTMS CONTINUE TO DEVELOP/SPREAD NORTH-NORTHWESTWARD IN
   VICINITY OF A SURFACE MOIST/INSTABILITY AXIS ALONG/NORTH OF ROUGHLY
   WSW-ENE ORIENTED SURFACE BOUNDARY THAT RESIDES NEAR/JUST NORTH OF
   I-70. GRADUAL LOSS OF DAYTIME HEATING /AND THE SURGING COLD FRONT
   ACROSS CO/ SHOULD LEAD TO AN INCREASINGLY MARGINAL TORNADO SCENARIO
   TOWARD/AFTER DARK. NONETHELESS...STEEP LAPSE RATES ALOFT/AMPLE
   EFFECTIVE SHEAR WILL CONTINUE TO SUPPORT SOME SUPERCELLS ACROSS FAR
   NORTHWEST KS INTO SOUTHERN NEB. THE POTENTIAL FOR SEVERE HAIL WILL
   LIKELY CONTINUE TO FOCUS/SHIFT EAST-NORTHEASTWARD THROUGH MID
   EVENING AS AN UPPER VORT MAX PIVOTS NORTHEASTWARD OVER THE REGION
   AND A LOW LEVEL JET BEGINS TO INCREASE/INTERACT WITH THE LOW LEVEL
   FRONTAL ZONE.
   
   ..GUYER.. 05/12/2011
   
   
   ATTN...WFO...GID...LBF...GLD...
   
   LAT...LON   39210103 39220224 40050229 40760125 40399948 39719951
               39210103