Mesoscale Discussion 1455
   NWS Storm Prediction Center Norman OK
   0159 AM CDT Sat Sep 15 2018

   Areas affected...Eastern NC

   Concerning...Tornado Watch 375...

   Valid 150659Z - 150830Z

   The severe weather threat for Tornado Watch 375 continues.

   SUMMARY...Threat for a tornado or two will persist for the next few
   hours as transient updraft strengthening occurs amidst favorable
   low-level shear.

   DISCUSSION...Recent radar imagery shows two well developed rain
   bands extending through the northern and eastern periphery of
   Tropical Storm Florence. Transient rotation has been noted in
   several cells embedded within these bands, primarily while the cells
   remained over the open water. Lightning has also been noted within
   these bands and both the lightning and rotation indicate the
   presence of somewhat more vigorous updrafts. 

   The general trend of occasional updraft strengthening and transient
   rotation is expected to persist for the next several hours amidst
   cell interactions and areas of locally enhanced surface convergence.
   Instability is fairly limited with much of the better theta-e air
   confined to the immediate coastal areas (delineated well by the 78
   deg F isotherm). This relatively narrow zone of instability was
   evidenced well by the line echo wave pattern noted within recent
   KMHX radar imagery, which is quickly losing its definition as it
   moves farther inland.

   ..Mosier.. 09/15/2018

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

   ATTN...WFO...MHX...RAH...ILM...

   LAT...LON   35357895 35707836 35597742 35217655 34427643 33377678
               33647844 34407910 35357895