MESOSCALE DISCUSSION 1016
   NWS STORM PREDICTION CENTER NORMAN OK
   0333 AM CDT WED JUN 10 2009
   
   AREAS AFFECTED...PARTS OF CENTRAL AND SRN MO
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 361...
   
   VALID 100833Z - 100900Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 361
   CONTINUES.
   
   NEW WW MAY BE NEEDED ACROSS PARTS OF CENTRAL/SRN MO AS LONG-LIVED
   ELEVATED SUPERCELLS TRACK ESEWD AT 40-45 KT ACROSS THE SRN HALF OF
   MO EARLY THIS MORNING.  HAIL AND STRONG WIND GUSTS WILL REMAIN THE
   PRIMARY THREATS WITH THIS ACTIVITY.
   
   REGIONAL RADAR IMAGERY INDICATED PERSISTENT SUPERCELL STRUCTURES
   DURING THE LAST 1-2 HOURS TRACKING ESEWD FROM FAR ERN KS INTO SWRN
   MO.  THIS CLUSTER OF TSTMS APPEARS TO BE ASSOCIATED WITH FORCING FOR
   ASCENT ATTENDANT TO A LOW AMPLITUDE MID LEVEL IMPULSE TRACKING EWD
   INTO MO ATTM PER WATER VAPOR IMAGERY.  THIS ACTIVITY IS LOCATED IN
   THE VICINITY OF A SURFACE BOUNDARY EXTENDING FROM E-W ACROSS SRN MO.
   LOW LEVEL WAA ALONG NOSE OF 35-45 KT SWLY LLJ EXTENDING INTO SRN MO
   WILL AID IN ASCENT FOR ADDITIONAL STORMS WITH THIS CLUSTER. 
   OBJECTIVE ANALYSES INDICATED AN INSTABILITY GRADIENT EXTENDING ESEWD
   INTO LOWER OH/TN VALLEYS WHICH SHOULD ASSIST EWD PROGRESSION OF
   ACTIVITY AS STORMS CONTINUE TO BE FED WITH MODERATE INSTABILITY PER
   SWLY LLJ.  TSTM CLUSTER IS EXPECTED TO TRACK ESEWD ACROSS SRN MO AS
   MID LEVEL IMPULSE PROGRESSES ACROSS MO.
   
   ..PETERS.. 06/10/2009
   
   
   ATTN...WFO...PAH...MEG...LSX...LZK...SGF...EAX...
   
   LAT...LON   37639451 38089438 38509318 38369235 37819105 37149055
               36509078 36269143 36509289 37009396 37639451