Mesoscale Discussion 0177
   NWS Storm Prediction Center Norman OK
   0331 PM CDT Mon Mar 26 2018

   Areas affected...a small part of the TX Big Country northeast into
   southwest OK

   Concerning...Severe Thunderstorm Watch 19...

   Valid 262031Z - 262130Z

   The severe weather threat for Severe Thunderstorm Watch 19
   continues.

   SUMMARY...A localized hail/wind risk will continue from the I-44 Red
   River Valley region southwestward into the TX Big Country.

   DISCUSSION...Radar imagery during the mid afternoon shows a broken
   band of storms acquiring a messy convective morphology across
   western north-central TX into southwest OK.  The parallel
   orientation of the mean flow/dryline will likely exacerbate the
   ability for storms with the cluster of storms southwest of Wichita
   Falls to become better organized and yield an otherwise greater hail
   risk.  Further complicating longer-term severe possibilities across
   this region is the northward advection of a well-mixed but drier
   boundary layer (surface dewpoints ranging from 56-61 degrees F) from
   south of I-20 northward to the Red River Valley.  A gradual
   reduction in buoyancy will result and serve as an overall limiting
   factor towards more vigorous updrafts/severe potential. 

   Farther south in the Big Country, discrete storm mode will likely
   continue for the next several hours until stronger forcing for
   ascent arrives later this evening.  Higher potential for severe hail
   will likely exist with any thunderstorm during the next 0-2 hour
   period in this mesoscale area compared to farther northeast.

   ..Smith.. 03/26/2018

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

   ATTN...WFO...OUN...SJT...LUB...MAF...

   LAT...LON   34039804 32390042 32530069 34349842 34309797 34039804