Mesoscale Discussion 1105
   NWS Storm Prediction Center Norman OK
   1035 PM CDT Fri Jun 25 2021

   Areas affected...east-central Missouri northeast to northern Indiana

   Concerning...Severe Thunderstorm Watch 317...319...

   Valid 260335Z - 260430Z

   CORRECTED FOR INCORRECT WATCH NUMBERS

   The severe weather threat for Severe Thunderstorm Watch 317, 319
   continues.

   SUMMARY...Severe threat continues to diminish across the watch
   areas. A brief window of strong wind potential may remain across
   eastern Illinois, but the overall convective trends suggest a new
   watch likely will not be needed.

   DISCUSSION...Overall thunderstorm severity continues to wane across
   the watch areas as evidenced by weakening of MESH cores and warming
   cloud tops. Additionally, given the loss of diurnal heating, low
   level stability should slowly increase overnight, reducing the
   potential for organized, severe thunderstorm outflows and brief
   tornadoes. However, a recent measured wind gust of 59 knots at
   Decatur, IL, reiterates that the wind potential, albeit low, does
   remain. Current thinking is that the overall isolated nature of the
   threat should preclude the need for a new watch, although a local
   extension in time of Severe Thunderstorm Watch 317 may be needed if
   the wind potential does not diminish as quickly as expected.

   ..Marsh.. 06/26/2021

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

   ATTN...WFO...IWX...IND...LOT...ILX...LSX...DVN...SGF...

   LAT...LON   38359166 40709030 41788609 41628560 40668561 39708705
               39228862 38499034 37759124 38359166