MESOSCALE DISCUSSION 1230
   NWS STORM PREDICTION CENTER NORMAN OK
   0637 AM CDT FRI JUN 19 2009
   
   AREAS AFFECTED...FAR SOUTHERN LOWER MI/NORTHERN INDIANA INTO OH AND
   ADJACENT WV
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 473...476...
   
   VALID 191137Z - 191300Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   473...476...CONTINUES.
   
   SEVERE TSTM WATCH 473 WILL BE ALLOWED TO EXPIRE AT 12Z. SEVERE TSTM
   WATCH 476 CONTINUES UNTIL 16Z WITH POTENTIAL FOR DAMAGING
   WINDS/SEVERE HAIL THROUGH THE EARLY MORNING HOURS. MONITORING FOR AN
   ADDITIONAL WATCH ACROSS SOUTHEAST OH INTO WV.
   
   EARLIER SQUALL LINE/BOW HAS TENDED TO WEAKEN/BROADEN WITH TIME...BUT
   POTENTIAL FOR ISOLATED DAMAGING WINDS WILL CONTINUE WITH
   FAST-SOUTHEAST MOVING LINEAR CLUSTERS THROUGH THE EARLY MORNING
   HOURS. ALONG/EAST OF A SURFACE WARM FRONT...WARM ADVECTION
   INDUCED/ROUGHLY NORTH-SOUTH LEADING BAND OF TSTMS MAY CONTINUE TO
   POSE AT LEAST AN ISOLATED SEVERE HAIL/DAMAGING WIND THREAT ACROSS
   SOUTHEAST OH INTO ADJACENT PARTS OF WV THIS MORNING. SEVERE HAIL
   WILL BE POSSIBLE AS WELL WITH ANY REGENERATIVE DEVELOPMENT ATOP THE
   WESTERN PERIPHERY/TRAILING COLD POOL OF THE MCS.
   
   ..GUYER.. 06/19/2009
   
   
   ATTN...WFO...PBZ...RLX...CLE...ILN...DTX...IWX...GRR...IND...
   
   LAT...LON   42288647 41898410 40818170 39718076 38208087 40318497
               41088668 42288647