Mesoscale Discussion 1661
   NWS Storm Prediction Center Norman OK
   1139 PM CDT Mon Aug 31 2020

   Areas affected...Central/Southeast OK...North-Central TX

   Concerning...Severe potential...Watch possible 

   Valid 010439Z - 010615Z

   Probability of Watch Issuance...40 percent

   SUMMARY...Strong-severe thunderstorm clusters will spread into
   southeast Oklahoma over the next few hours. Severe thunderstorm
   watch may need to be expanded downstream.

   DISCUSSION...Short-wave trough continues its eastward movement
   across the southern Plains this evening. Over the last hour or so,
   numerous thunderstorm clusters have evolved within an elongated
   warm-advection corridor from west of OKC-MLC. This activity is
   gradually expanding in areal coverage as large-scale forcing for
   ascent spreads into this region ahead of the short wave.
   Additionally, a north-south band of intensifying storms has become
   more organized from Montague into Wise County TX. This band of
   storms appears strongly correlated with the ejecting trough and
   should track east-northeast along the Red River over the next
   several hours. There is some concern this squall line could begin to
   produce locally severe wind gusts as it is more favorably oriented
   to the mean background flow.

   ..Darrow/Guyer.. 09/01/2020

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

   ATTN...WFO...TSA...FWD...OUN...

   LAT...LON   35739762 35289563 34249532 33359715 34489738 35209792
               35739762