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Storm Prediction Center Mesoscale Discussion 1338

Mesoscale Discussion 1338
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   Mesoscale Discussion 1338
   NWS Storm Prediction Center Norman OK
   1144 PM CDT Wed Jun 19 2024

   Areas affected...Deep South Texas

   Concerning...Tornado Watch 437...

   Valid 200444Z - 200645Z

   The severe weather threat for Tornado Watch 437 continues.

   SUMMARY...Occasionally strengthening showers and thunderstorms may
   continue to be accompanied by potential for a brief, weak tornado
   into the 1-3 AM CDT time frame.

   DISCUSSION...As Alberto slowly progresses toward the Mexican Gulf
   coast, a broad belt of moderately strong cyclonic easterly low-level
   flow (including 40-50 kt around 850 mb) will likely be maintained to
   its north, across and inland of Deep South Texas coastal areas into
   the overnight hours.  Beneath this regime, moderately large
   clockwise-curved low-level hodographs may be maintained at least
   several more hours.   Coupled with the potential for appreciable
   upward vertical motion within the lowest couple of kilometers above
   ground level, aided by the instability associated with a tropical
   moist boundary layer (including upper 70s to near 80F surface dew
   points), this will continue to contribute to an environment
   supportive of occasionally intensifying low-level mesocyclones
   within scattered inland progressing convection.

   ..Kerr.. 06/20/2024

   ...Please see for graphic product...


   LAT...LON   27709991 28059863 28299699 27179662 26719719 26079757
               25759871 27129981 27709991 

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