Mesoscale Discussion 0734
   NWS Storm Prediction Center Norman OK
   1139 PM CDT Mon May 25 2020

   Areas affected...Southwest and South Texas

   Concerning...Severe Thunderstorm Watch 227...

   Valid 260439Z - 260645Z

   The severe weather threat for Severe Thunderstorm Watch 227
   continues.

   SUMMARY...An isolated severe threat is expected to continue across
   parts of southwest and south-central Texas for a few more hours.
   Damaging wind gusts and hail will be the primary threats.

   DISCUSSION...Latest surface analysis shows a 997 mb low across
   northern Mexico with backed east to northeast flow across much of
   south and central Texas. A moist airmass is present across
   south-central Texas with surface dewpoints generally in the lower
   70s F. This is contributing to moderate instability with the RAP
   estimating MLCAPE in the 1500 to 2500 J/kg range. The strongest
   instability is located near the lower Rio Grand River. Regional
   WSR-88D VWPs at Brownsville and near Del Rio have 0-6 km shear of 35
   to 40 kt. This should be enough to continue an isolated severe
   threat over the next few hours. Hail and damaging wind gusts could
   occur with the stronger multicells and any storms that exhibit
   supercell characteristics.

   ..Broyles.. 05/26/2020

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

   ATTN...WFO...CRP...EWX...BRO...MAF...

   LAT...LON   26059783 26039811 26149843 26329886 26419905 26539912
               27059938 27299948 27439951 27599956 27769987 28110006
               28240020 28490036 28840050 29290078 29740142 29820156
               29810174 30280178 30289930 30169931 30169891 29829890
               29739883 29769863 29779838 29679831 29549811 29429813
               29409786 29119764 29009775 28859758 28739775 28469762
               28439742 28389739 28099760 28179781 28159792 28089786
               28039786 27899790 27709790 27649805 27349805 27259804
               27259799 26439798 26439788 26059783