Mesoscale Discussion 0678
   NWS Storm Prediction Center Norman OK
   0713 PM CDT Sat May 18 2019

   Areas affected...portions of central into southeast TX

   Concerning...Tornado Watch 184...

   Valid 190013Z - 190115Z

   The severe weather threat for Tornado Watch 184 continues.

   SUMMARY...Main severe threat is shifting northeast of WW 184 into
   east-central TX. A more conditional threat may persist across parts
   of central into southeast TX this evening, but further convective
   development is uncertain.

   DISCUSSION...Severe thunderstorms are mainly confined to the
   northeast boundary of WW 184, heading northeast into east-central TX
   and into downstream WW 189. To the south/southwest, there has been
   some deepening of shallow convection across central TX, where a very
   unstable and moist airmass resides. However, ascent across this area
   is weak and the dryline remains well west of the region.
   Additionally, latest CAMs do not develop convection across the
   Edwards Plateau vicinity. As such, confidence is low as far as
   severe threat going forward this evening, and will be rather
   conditional on any new development. If more robust convection is
   able to develop, all severe hazards will remain possible, but large
   hail would be the main threat. A new watch or extension of current
   watch beyond 01z expiration time is possible, but uncertain at this
   time.

   ..Leitman.. 05/19/2019

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

   ATTN...WFO...SHV...HGX...FWD...EWX...

   LAT...LON   31129773 32099548 31929504 30889470 30459501 29819693
               29779744 30049769 30599771 31129773