Mesoscale Discussion 1159
   NWS Storm Prediction Center Norman OK
   0251 PM CDT Thu Jul 09 2020

   Areas affected...eastern Iowa...southern Wisconsin...northern
   Illinois

   Concerning...Severe Thunderstorm Watch 348...

   Valid 091951Z - 092145Z

   The severe weather threat for Severe Thunderstorm Watch 348
   continues.

   SUMMARY...A threat of severe wind gusts and marginal hail continues
   across watch 348, and may spread east into southern Wisconsin and
   northern Illinois, necessitating another watch.

   DISCUSSION...An impressive flourish of storms near the meso-low/MCV
   has produced several measured severe gusts over IA. The primary low
   is now intersecting the east-west oriented outflow boundary over
   southern WI and far southeast MN, with cooler air to the north
   likely reducing wind potential. That said, this outflow boundary may
   stall and mix out, with a resurgence of larger SBCAPE northward into
   WI this evening.

   While the MCV is moving relatively slowly east, there still may be
   potential for at least isolated severe wind/hail across the warm
   sector over IL and southern WI where the air mass is clearly
   uncapped. Only subtle lift will be required to initiate storms in
   this air mass. The combination of storms along the MCV and any
   additional lead storms may necessitate a severe thunderstorm watch
   later this afternoon.

   ..Jewell.. 07/09/2020

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...LOT...ILX...MKX...DVN...ARX...DMX...

   LAT...LON   43839144 44049091 43768890 43318785 42888753 42888751
               42308731 41708742 41328819 40629067 40629171 40719239
               41049314 41449296 41859197 42379139 42939120 43189118
               43839144