Mesoscale Discussion 0405
   NWS Storm Prediction Center Norman OK
   1240 PM CDT Fri Apr 19 2019
   Areas affected...Portions of southwest VA into western NC and
   northern SC
   Concerning...Tornado Watch 
88...
   Valid 191740Z - 191945Z
   The severe weather threat for Tornado Watch 88 continues.
   SUMMARY...Severe threat continues across Tornado Watch 88. Damaging
   wind gusts and isolated tornadoes will be possible with the more
   organized, long-lived storms.
   DISCUSSION...The surface low across eastern TN continues to
   translate northeast as it deepens, fostering an intensification of
   the low-level wind field and associated low-level shear across
   Tornado Watch 088. Continued northward advection of warm, moist air
   into the region is fostering a gradual increase in instability, with
   up to 1000 J/kg MLCAPE noted across southeastern portions of the
   watch. As the mid-level trough continues to approach from the west,
   increasing deep-layer ascent is expected to contribute to an uptick
   in convection in the next few hours. 
   Latest high-resolution model guidance suggests that convection will
   remain semi-discrete in nature. The more intense cells will be
   capable of producing damaging wind gusts. A few tornadoes are also
   possible with storms that can sustain strong low-level rotation.