MESOSCALE DISCUSSION 1929
   NWS STORM PREDICTION CENTER NORMAN OK
   0818 PM CDT WED AUG 19 2009
   
   AREAS AFFECTED...SRN LOWER MI...ERN IND AND OH
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 716...
   
   VALID 200118Z - 200215Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 716
   CONTINUES.
   
   THE SEVERE THREAT IN IND AND WRN OH WILL LIKELY CONTINUE EWD LATE
   THIS EVENING ACROSS THE REMAINDER OF WW 716. WIND DAMAGE AND HAIL
   WILL BE POSSIBLE WITH THE STRONGER CELLS. THE SEVERE THREATS MAY
   EXPAND NWD ACROSS PARTS OF SCNTRL LOWER MI AND EWD INTO PARTS OF
   CNTRL OH. A LOCAL EXTENSION MAY BECOME NECESSARY LATER THIS EVENING.
   
   
   A BOWING LINE-SEGMENT IN CNTRL IND IS LOCATED JUST SOUTH OF A WARM
   FRONT EXTENDING EWD INTO FAR NRN OH. SOUTH OF THIS BOUNDARY...THE
   RUC IS ANALYZING MODERATE INSTABILITY WITH A VERY MOIST AIRMASS IN
   PLACE. ALTHOUGH LARGE-SCALE ASCENT WEAKENS EWD INTO THE UPPER OH
   VALLEY...INCREASING LOW-LEVEL FLOW AND THE AMOUNT OF INSTABILITY MAY
   BE ENOUGH TO SUSTAIN THE BOWING LINE SEGMENT WITH A DAMAGING WIND
   THREAT EWD INTO PARTS OF WRN AND CNTRL OH BY LATE EVENING. NORTH OF
   THE WARM FRONT IN SRN LOWER MI...INSTABILITY IS MUCH WEAKER BUT THE
   RUC SUGGESTS 40 KT OF 0-6 KM SHEAR EXISTS WHICH MAY BE SUFFICIENT
   FOR AN ISOLATED SEVERE THREAT. HAIL AND A FEW DAMAGING WIND GUSTS
   WOULD BE POSSIBLE.
   
   ..BROYLES.. 08/20/2009
   
   
   ATTN...WFO...PBZ...RLX...CLE...ILN...DTX...GRR...
   
   LAT...LON   42168470 42208542 42368572 42818597 43088588 43308562
               43438531 43428494 43378451 43288402 43038361 42608319
               42318286 41908257 41648216 41298177 40848119 40428106
               40048106 39808139 39628204 39508261 39788310 40778326
               40958369 41748376 42128417 42168470