MESOSCALE DISCUSSION 1927
   NWS STORM PREDICTION CENTER NORMAN OK
   0745 PM CDT WED AUG 19 2009
   
   AREAS AFFECTED...WRN WI...ERN IA AND NW IL
   
   CONCERNING...TORNADO WATCH 715...
   
   VALID 200045Z - 200215Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 715 CONTINUES.
   
   A THREAT FOR WIND DAMAGE WILL CONTINUE ACROSS THE ERN PART OF
   TORNADO WATCH 715. ROTATING STORMS AND AN ISOLATED TORNADO THREAT
   WILL ALSO BE POSSIBLE WITH THE STRONG CELL ELEMENTS. THE SEVERE
   THREATS SHOULD BECOME INCREASINGLY MARGINAL TOWARD WW EXPIRATION AND
   A NEW WW IS NOT ANTICIPATED EAST OF THE CURRENT WATCH.
   
   A BAND OF CONVECTION ORIENTED NNW TO SSE ACROSS WRN WI IS NEAR A
   WARM FRONT AND IS ON THE ERN SIDE OF A STRENGTHENING LOW-LEVEL JET
   ANALYZED BY THE RUC IN NWRN WI. THIS FEATURE IS CREATING LOOPED
   HODOGRAPHS FAVORABLE FOR ROTATING STORMS AND AN ISOLATED TORNADO
   THREAT WHICH IS SHOWN WELL BY THE LACROSSE WSR88D-VWP. HOWEVER...SFC
   DEWPOINTS GRADUALLY DROP OFF EWD ACROSS CNTRL AND ERN WI. THIS
   COMBINED WITH A RECENT DOWNTREND IN THE REFLECTIVITY SIGNATURES
   SUGGESTS ANY SEVERE THREAT SHOULD REMAIN ISOLATED OVER THE NEXT FEW
   HOURS. DUE TO THE STRONG LOW-LEVEL FLOW IN PLACE...THE GREATEST
   THREAT MAY BE DAMAGING WIND GUSTS.
   
   ..BROYLES.. 08/20/2009
   
   
   ATTN...WFO...GRB...LOT...ILX...MKX...DVN...DLH...ARX...MPX...
   DMX...
   
   LAT...LON   46119226 45679288 45519274 45079279 44789278 44589232
               44459230 44349249 44169249 44159231 44099227 44089205
               43859205 43869241 43529245 43509206 42329208 42319179
               41849183 41849230 41509226 41519148 41349136 41329111
               41079097 41079042 41179044 41178989 41218988 41258964
               41148967 41198935 41118936 41098916 41598915 41608964
               41928963 41958968 42218969 42188942 42898936 42888986
               43228986 43408959 43598961 43608977 43648967 43658960
               44238962 44279034 45029033 45019018 45129019 45119003
               45979004 45989085 46149087 46119226