MESOSCALE DISCUSSION 0821
   NWS STORM PREDICTION CENTER NORMAN OK
   0847 PM CDT SAT JUN 05 2010
   
   AREAS AFFECTED...NERN IND / NWRN OH / EXTREME SRN LOWER MICH
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 060147Z - 060245Z
   
   A TORNADO WATCH IS LIKELY IN THE NEXT HOUR OR TWO DOWNSTREAM OF THE
   ONGOING TORNADO WATCHES LOCATED IN IL AND NWRN IND.  UPDRAFTS ARE
   DEVELOPING IN NERN IND...IF THESE STORMS STRENGTHEN/DEEPEN AND
   BECOME ORGANIZED...A TORNADO WATCH MAY BE NEEDED SOONER RATHER THAN
   LATER TO ADDRESS AN ISOLD TORNADO THREAT ACROSS NERN IND...NWRN
   OH...AND EXTREME SRN LOWER MICH.
   
   LATEST VWP/VAD DATA FROM NRN IND SHOWS A VERY SUPPORTIVE SUPERCELL
   WIND PROFILE /0-3 KM SRH 500 M2 PER S2/ IN PLACE ACROSS THE WARM
   SECTOR OVER NRN IND S OF A WARM FRONT THAT IS LOCATED OVER SRN LOWER
   MICH.  KIWX RADAR IMAGERY SHOWS NEWLY DEVELOPED STORMS DEEPENING
   WITH TIME...AS ECHO TOPS HAVE INCREASED IN HEIGHT AND LIGHTNING IS
   NOW BEING OBSERVED AS OF 0135Z.  THIS SMALL CLUSTER OF STORMS IS
   LOCATED ALONG A DIFFUSE RESIDUAL BOUNDARY FROM PRIOR
   CONVECTION....AND IS DELINEATING A WARM...MOIST AND UNSTABLE AIRMASS
   TO THE S OVER IND AND A COOLER/LESS UNSTABLE AIRMASS IN SRN LOWER
   MICH.  IF THESE STORMS CONTINUE TO STRENGTHEN AND INCREASE IN
   VIGOR...A TORNADO WATCH MAY BE NEEDED AS SOON AS IN THE NEXT
   HOUR--CONDITIONAL ON THE NERN IND STORM DEVELOPMENT.
   
   ..SMITH.. 06/06/2010
   
   
   ATTN...WFO...CLE...ILN...DTX...IWX...IND...LOT...
   
   LAT...LON   40318735 41718678 41908647 41958500 41818364 41508344
               41018344 40628410 40288534 40318735