Mesoscale Discussion 0611
   NWS Storm Prediction Center Norman OK
   1144 PM CDT Fri May 15 2020

   Areas affected...East-central Texas...Texas Coastal Plains

   Concerning...Severe Thunderstorm Watch 189...

   Valid 160444Z - 160645Z

   The severe weather threat for Severe Thunderstorm Watch 189
   continues.

   SUMMARY...A severe threat is likely to continue from east-central
   Texas southward onto the Texas Coastal Plains for several more
   hours. Wind damage and isolated large hail will be the primary
   threats.

   DISCUSSION...A very large linear MCS is currently ongoing from the
   vicinity of Fort Worth southward along the I-35 corridor to the
   Austin and San Antonio areas. Surface dewpoints ahead of the
   squall-line are in the 60s F in east-central Texas and in the lower
   70s in the middle Texas Coastal Plains. The very moist airmass is
   contributing to an axis of moderate to strong instability located
   along and just ahead of the linear MCS. The RAP is estimating MLCAPE
   in the 2000 to 3500 J/kg range. This combined with steep mid-level
   lapse rates near 8.0 C/km is creating a thermodynamic environment
   favorable for severe storms. Wind damage will be possible with
   bowing segments along the leading edge of the line. Hail may also
   occur with the stronger cells embedded in the line. The severe
   threat is expected to persist for several more hours as it moves
   across the Texas Coastal Plains during the overnight period.

   ..Broyles.. 05/16/2020

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

   ATTN...WFO...HGX...FWD...CRP...EWX...BRO...

   LAT...LON   32829705 32379758 31469771 29569824 28929872 28019923
               27329893 26939790 27129648 28259571 29959568 32569588
               32829705