Mesoscale Discussion 0412
   NWS Storm Prediction Center Norman OK
   0646 PM CDT Fri Apr 23 2021

   Areas affected...Areas near/west of I-35 corridor of central Texas

   Concerning...Severe Thunderstorm Watch 98...

   Valid 232346Z - 240115Z

   The severe weather threat for Severe Thunderstorm Watch 98
   continues.

   SUMMARY...The potential for severe hail and wind is expected to
   become more isolated with a decrease in storm coverage through 8-10
   PM CDT.  It is possible that parts of remaining valid portions of
   Severe Thunderstorm Watch 98 could be replaced with a new severe
   weather watch, but this is not certain.

   DISCUSSION...Widely scattered strong to severe thunderstorm
   development is ongoing west of the Interstate 35 corridor.  This
   activity initiated near the dryline, but moderate to strong
   southwesterly deep-layer mean flow is aiding eastward advection
   ahead of the eastward advancing surface boundary.  North of the San
   Antonio area, this is tending to spread into an environment
   stabilized by prior convection.  With the onset of boundary-layer
   cooling along the dryline, inhibition beneath relatively warm
   mid-level layers probably will begin to reduce convective coverage
   in the absence of stronger deep-layer forcing for ascent.  

   The isolated cell south-southwest of San Antonio is developing into
   locally moderate to strong instability characterized by CAPE up to
   3000 J/kg.  This activity might be slower to diminish, perhaps aided
   by forcing associated with a subtropical jet speed maximum.

   Otherwise, lift north/northeast of the weak triple-point low may
   become a focus for a consolidating cluster of storms, near/south of
   the Red River, to the northwest/north of the Dallas-Fort Worth
   Metroplex through 01-03Z.

   ..Kerr.. 04/23/2021

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

   ATTN...WFO...FWD...CRP...EWX...SJT...

   LAT...LON   29529931 30709846 31549833 32519860 33349838 32799703
               30399747 28469846 28439958 29529931