MESOSCALE DISCUSSION 0984
   NWS STORM PREDICTION CENTER NORMAN OK
   0230 AM CDT MON JUN 08 2009
   
   AREAS AFFECTED...PARTS OF SRN IA AND NRN MO
   
   CONCERNING...TORNADO WATCH 347...
   
   VALID 080730Z - 080830Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 347 CONTINUES.
   
   ISOLATED TORNADO THREAT PERSISTS FROM NWRN INTO NORTH CENTRAL MO AND
   SOUTH CENTRAL IA.  LOCATIONS OUTSIDE OF THESE AREAS SHOULD HAVE A
   PRIMARY THREAT FOR STRONGER STORMS PRODUCING HAIL.
   
   07Z SURFACE ANALYSIS INDICATED AN AREA OF LOW PRESSURE OVER FAR NWRN
   MO /N OF STJ/...WITH A SECOND LOW PRESSURE CENTER OVER CENTRAL IA
   /VICINITY OF DSM/.  A WARM FRONT EXTENDED EWD FROM THIS SECOND LOW
   THROUGH NRN IL TO SWRN LOWER MI.  REGIONAL RADARS INDICATED A RECENT
   INCREASE IN REFLECTIVITY OVER FAR NWRN MO WHERE LOW LEVEL
   CONVERGENCE IS LIKELY MAXIMIZED NEAR THE AFOREMENTIONED SURFACE LOW.
   SURFACE WINDS EAST OF THIS CLUSTER OF STORMS HAVE BACKED TO
   SSELY...MAINTAINING EFFECTIVE SRH VALUES AROUND 200 M2/S2.  THUS...
   ACTIVITY MOVING NEWD THROUGH NWRN MO TOWARD NORTH CENTRAL MO/SOUTH
   CENTRAL IA APPEARS TO HAVE THE GREATEST POTENTIAL FOR A TORNADO
   THROUGH 09-10Z AS IT ENCOUNTERS RESIDUAL AREA OF MODERATE
   INSTABILITY.  IF THE NWRN MO TSTMS SHOW A FURTHER INCREASE IN
   INTENSITIES...THEN A LOCAL EWD EXTENSION OF WW 347 MAY BE NEEDED
   ACROSS SRN IA.
   
   ..PETERS.. 06/08/2009
   
   
   ATTN...WFO...DVN...DMX...EAX...OAX...TOP...
   
   LAT...LON   39479431 39559501 39919538 40959589 41539605 41519430
               41839425 41869275 41549224 40929195 40479280 39929307
               39649334 39519373 39479431