Mesoscale Discussion 1276
   NWS Storm Prediction Center Norman OK
   1219 PM CDT Sun Jul 19 2020

   Areas affected...northeastern Illinois across northern Indiana

   Concerning...Severe Thunderstorm Watch 384...

   Valid 191719Z - 191845Z

   The severe weather threat for Severe Thunderstorm Watch 384
   continues.

   SUMMARY...Organized storms/severe risk continues spreading across WW
   384, with a recent convective increase near and just south of the
   southern fringe of the watch.

   DISCUSSION...Latest radar loop shows storms moving across the
   northeastern Illinois/northwestern Indiana state line, and adjacent
   portions of southern Lake Michigan, where local risk for damaging
   winds continues.  Meanwhile, a flanking band of storms -- from
   northwestern Indiana west-southwest into east-central Illinois has
   increased in intensity over the past hour -- with an 86 MPH wind
   gust recently reported from Jasper County Indiana.

   This convective increase is occurring within a band of moderate
   instability (2000 J/kg mixed-layer CAPE), that extends from southern
   and eastern portions of the watch southward into central portions of
   Illinois and Indiana.  While area VWPs and model forecasts continue
   to show the deep-layer wind field decreasing rapidly in intensity
   with southward extent, areas just south of the ongoing WW will
   continue to be monitored for the need for a small watch over central
   Indiana.

   ..Goss.. 07/19/2020

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

   ATTN...WFO...IWX...GRR...IND...LOT...ILX...

   LAT...LON   41968742 42098628 42078494 41388485 40398612 40228690
               40228923 40698844 41108774 41878768 41968742