SPC AC 271702

   Day 2 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1202 PM CDT Fri Oct 27 2017

   Valid 281200Z - 291200Z

   ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
   SOUTH FLORIDA...

   ...SUMMARY...
   Thunderstorms with a marginal risk of damaging wind gusts may impact
   southern Florida and the Keys late Saturday afternoon into the
   evening.

   ...South Florida...
   An upper-level trough will move across the Mississippi Valley on
   Saturday as southwest mid-level flow remains over much of the
   Southeast. Low-level moisture advection will increase across the
   Florida Peninsula on Saturday as heights fall ahead of the
   approaching upper-level trough. In response, a moist airmass will
   overtake south Florida with surface dewpoints increasing into the
   upper 60s and lower 70s F range by Saturday evening. The potential
   for thunderstorm development will gradually increase during the day
   in response to the strengthening low-level flow. Forecast soundings
   at Miami around 21Z on Saturday show MLCAPE values around 500 J/kg
   with 0-6 km shear peaking near 30 kt. This along with the high
   surface dewpoints should be enough for a few strong thunderstorms
   capable of marginally severe wind gusts. The threat should continue
   in the evening but should remain marginal.

   ..Broyles.. 10/27/2017

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