MESOSCALE DISCUSSION 1313
   NWS STORM PREDICTION CENTER NORMAN OK
   0729 AM CDT MON JUN 20 2011
   
   AREAS AFFECTED...CENTRAL IA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 521...
   
   VALID 201229Z - 201330Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 521
   CONTINUES.
   
   OBJECTIVE ANALYSES INDICATED RESIDUAL MODERATE INSTABILITY EXTENDING
   INTO SRN IA/NRN MO AND EFFECTIVE BULK SHEAR OF 40-60 KT REMAIN
   SUPPORTIVE OF ORGANIZED STORMS.  ADDITIONAL TSTMS ARE POSSIBLE THIS
   MORNING WITHIN A WAA REGIME IN THE NOSE OF 45-65 KT SWLY LLJ
   EXTENDING INTO THE SWRN PERIPHERY OF A TSTM COMPLEX CURRENTLY
   LOCATED ACROSS CENTRAL/ERN IA AND NERN MO.  HOWEVER...WARMING CLOUD
   TOP TEMPERATURES AND WEAKENING STORM INTENSITIES ACROSS THE
   REMAINDER OF WW 521 SUGGEST THE OVERALL SEVERE WEATHER THREAT SHOULD
   CONTINUE TO WANE ACROSS CENTRAL IA.
   
   ..PETERS.. 06/20/2011
   
   
   ATTN...WFO...DVN...DMX...
   
   LAT...LON   41149341 42569418 42629194 41169243 41149341