MESOSCALE DISCUSSION 0837
   NWS STORM PREDICTION CENTER NORMAN OK
   0343 PM CDT FRI MAY 15 2009
   
   AREAS AFFECTED...NERN KS...NRN MO AND WEST CENTRAL IL
   
   CONCERNING...TORNADO WATCH 305...
   
   VALID 152043Z - 152145Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 305 CONTINUES.
   
   THREAT FOR DAMAGING WINDS/HAIL AND ISOLATED TORNADOES PERSISTS
   ACROSS WW 305.  WW WILL LIKELY NEED TO BE LOCALLY EXTENDED IN AREA 
   SWD ACROSS WRN/CENTRAL MO.
   
   AT 2030Z...REGIONAL RADARS INDICATED A BOW MOVING EWD AT 35-40 KT
   THROUGH NRN MO /CHARITON COUNTY/.  THIS EWD MOVEMENT IS EXPECTED TO
   CONTINUE INTO NERN MO ALONG INSTABILITY GRADIENT WHICH EXTENDS INTO
   CENTRAL IL.  40-45 KT OF EFFECTIVE BULK SHEAR ACROSS THIS REGION
   WILL SUPPORT FURTHER STORM ORGANIZATION...WITH SWLY LOW LEVEL FLOW
   MAINTAINING INFLUX OF RICH MOISTURE INTO THIS MCS.  OUTFLOW BOUNDARY
   EXTENDING WSWWD FROM LEADING EDGE OF BOW STRETCHED THROUGH SRN
   LAFAYETTE COUNTY MO TO NRN JOHNSON COUNTY KS.  
   
   HEAVY RAINFALL EVENT IS UNDERWAY ACROSS NERN KS INTO NWRN MO AS
   STORMS CONTINUE TO DEVELOP ALONG SWRN PERIPHERY OF MCS IN NERN KS
   AND TRAIN EWD N OF AFOREMENTIONED OUTFLOW BOUNDARY.  FOR ADDITIONAL
   INFORMATION ABOUT THE HEAVY RAINFALL THREAT...PLEASE REFER TO SPC
   MESOSCALE DISCUSSION #836.
   
   ..PETERS.. 05/15/2009
   
   
   ATTN...WFO...ILX...LSX...SGF...EAX...TOP...
   
   LAT...LON   38779505 39479550 40119478 40379266 40179182 40059065
               38919062 38639106 38599202 38449256 38779344 38779505