MESOSCALE DISCUSSION 0772
   NWS STORM PREDICTION CENTER NORMAN OK
   1027 PM CDT THU MAY 12 2011
   
   AREAS AFFECTED...WESTERN/CENTRAL IA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 295...
   
   VALID 130327Z - 130430Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 295
   CONTINUES.
   
   SEVERE TSTM WATCH 295 CONTINUES UNTIL 06Z ACROSS PORTIONS OF
   WESTERN/CENTRAL IA...WITH CONTINUED POTENTIAL FOR SEVERE HAIL.
   
   STRONG/SEVERE TSTM DEVELOPMENT WILL CONTINUE TO FAVOR THE COOL
   /NORTH/ SIDE A SOUTHEASTWARD SAGGING SURFACE FRONT THAT EXTENDS
   NORTHEASTWARD FROM THE OMAHA AREA TO NORTHEAST IA...WITH ADDITIONAL
   TSTM DEVELOPMENT ANTICIPATED TO OCCUR INTO SOUTHWEST/SOUTH-CENTRAL
   IA OVERNIGHT. PER THE 00Z OMAHA OBSERVED RAOB AND MORE CONTEMPORARY
   RUC SOUNDINGS...STEEP LAPSE RATES ALOFT AND AMPLE ELEVATED
   INSTABILITY/EFFECTIVE SHEAR EXISTS ESPECIALLY IN VICINITY OF THE
   AFOREMENTIONED BOUNDARY TO MAINTAIN A SEVERE HAIL THREAT LATE THIS
   EVENING AND POTENTIALLY INTO THE OVERNIGHT.
   
   ..GUYER.. 05/13/2011
   
   
   ATTN...WFO...DVN...ARX...DMX...OAX...
   
   LAT...LON   41069610 41339614 42049518 42869391 43059261 42539203
               41219263 40599567 41069610