MESOSCALE DISCUSSION 1083
   NWS STORM PREDICTION CENTER NORMAN OK
   0907 PM CDT FRI JUN 03 2011
   
   AREAS AFFECTED...UPPER PENINSULA OF MICHIGAN
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 040207Z - 040330Z
   
   IT APPEARS THAT A NEW WW MAY BE NEEDED WITHIN THE NEXT HOUR OR SO.
   
   ONGOING CONVECTIVE DEVELOPMENT ACROSS NORTHWEST WISCONSIN AND
   WESTERN LAKE SUPERIOR IS OCCURRING WITHIN A LARGE-SCALE LOWER/MID-
   TROPOSPHERIC WARM ADVECTION REGIME...DOWNSTREAM OF A SIGNIFICANT
   SHORT WAVE IMPULSE NOW LIFTING NORTHEASTWARD THROUGH MANITOBA.  A
   SMALLER SCALE IMPULSE MAY BE LIFTING ACROSS THE UPPER MISSISSIPPI
   VALLEY...IN CLOSER PROXIMITY TO THE UPPER RIDGE AXIS...WHICH MAY
   TURN EASTWARD ACROSS LAKE SUPERIOR INTO ONTARIO LATE THIS EVENING. 
   THIS MAY SUPPRESS THE MID-LEVEL RIDGE AND WEAKEN INHIBITION ENOUGH
   TO ALLOW FOR FURTHER CONVECTIVE GROWTH...AND THE EVOLUTION OF AN
   ORGANIZED CONVECTIVE SYSTEM IN THE PRESENCE OF LARGE CAPE
   /2000-3000+ J PER KG/...AND SHEARED...40 KT DEEP LAYER FLOW FIELD. 
   THIS MAY IMPACT MUCH OF THE UPPER PENINSULA OF MICHIGAN WITH THE
   RISK FOR LARGE HAIL AND DAMAGING WIND GUSTS.
   
   ..KERR.. 06/04/2011
   
   
   ATTN...WFO...APX...MQT...GRB...
   
   LAT...LON   46668993 47778802 47278521 46138400 45498646 45418796
               46668993