MESOSCALE DISCUSSION 1753
   NWS STORM PREDICTION CENTER NORMAN OK
   0552 PM CDT THU JUL 10 2008
   
   AREAS AFFECTED...SRN WI...NRN IL...SRN LOWER MI...FAR NW IND
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 677...
   
   VALID 102252Z - 110015Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 677
   CONTINUES.
   
   THE WIND DAMAGE THREAT WITH A BOWING MCS WILL LIKELY CONTINUE ESEWD
   ACROSS SE WI...NRN IL AND POSSIBLY INTO SRN LOWER MI AND NRN IND BY
   MID-EVENING. THE ISSUANCE OF A WW EAST OF WW 677 WILL HAVE TO BE
   CONSIDERED LATER THIS EVENING.
   
   LATEST SFC ANALYSIS SHOWS A WELL-DEFINED COLD POOL OVER SW WI WITH A
   MOIST AXIS LOCATED TO THE SOUTHWEST ACROSS ERN IA. SFC DEWPOINTS IN
   THE LOWER TO MID 70S F ARE CREATING A MODERATELY UNSTABLE AIRMASS
   ACROSS SRN WI AND NRN IL WITH A WELL-DEFINED BOWING LINE SEGMENT
   RIDING ESEWD DOWN THE INSTABILITY GRADIENT. THE DERECHO WILL
   CONTINUE ESEWD REACHING THE ERN PART OF WW 677 BY 02Z TO 03Z. THE
   LINE MAY BEGIN TO TURN MORE EAST FAVORING INSTABILITY OVER SRN LOWER
   MI. HOWEVER...VERTICAL SHEAR IS WEAKER ACROSS LOWER MI AND THIS MAY
   CONTRIBUTE TO A GRADUAL DOWNTREND IN SEVERE WEATHER THREAT COVERAGE.
   STILL...WIND DAMAGE AND HAIL WILL BE POSSIBLE WITH THE MCS THROUGH
   MID-EVENING. WW ISSUANCE STILL REMAINS POSSIBLE EAST OF WW 677.
   
   ..BROYLES.. 07/10/2008
   
   
   ATTN...WFO...IWX...GRB...LOT...ILX...MKX...DVN...ARX...DMX...
   
   42619156 42209151 42279226 41509227 41499247 41209242
   41139129 41059128 41029034 41119038 41108992 41238988
   41138961 41128960 41148929 41128815 41208816 41188798
   41298800 41258749 41148745 41298712 41208691 42408697
   43438715 43788717 43818772 43908774 43928891 44008892
   43988957 43668959 43709035 43229018 43169046 42489043
   42659083 42659155 
   

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