SPC AC 070057

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0757 PM CDT Tue Jun 06 2017

   Valid 070100Z - 071200Z

   ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PORTIONS OF
   THE SOUTHERN HIGH PLAINS...

   ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR SOUTH
   FLORIDA...

   ...SUMMARY...
   Isolated severe thunderstorms will remain possible this evening into
   tonight across portions of the southern High Plains as well as South
   Florida.

   ...Southern High Plains...
   Weak upslope flow beneath moderate northwesterlies in the mid- to
   high-levels amidst a well-mixed/steep lapse rate environment this
   evening will contribute to an isolated severe thunderstorms across
   the southern High Plains.  As the boundary layer cools this evening,
   a gradual diminishing in storm intensity and severe risk is
   anticipated.

   ...South Florida...
   A mid-level vorticity maximum over the mouth of the MS River this
   evening will gradually move east into the FL Panhandle.  Water-vapor
   imagery Tuesday evening shows a dry intrusion across the eastern
   Gulf to the north of an effective frontal zone over the southeastern
   Gulf through South FL.  A moisture rich/maritime airmass may yield a
   couple of stronger storms and a low risk for a damaging gust or
   perhaps weak/brief tornado as the convective line over South FL
   gradually pushes into the FL Straits.  To the north of the boundary,
   the 00Z raobs sampled weak lapse rates and weak buoyancy owing in
   part to the shallow depth of rich moisture---likely precluding
   strong/severe storm development later tonight.

   ..Smith.. 06/07/2017

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   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z