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Mesoscale Discussion 128
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   Mesoscale Discussion 0128
   NWS Storm Prediction Center Norman OK
   0122 AM CST Mon Jan 23 2017

   Areas affected...Southern Florida

   Concerning...Tornado Watch 24...

   Valid 230722Z - 230845Z

   The severe weather threat for Tornado Watch 24 continues.

   SUMMARY...An isolated severe/tornado risk continues across the
   southern extent of WW 24, as a broken band of storms advances
   through South Florida during the next 3-4 hours (until 10-11Z).

   DISCUSSION...At 0715Z, mosaic radar imagery continued to show a
   broken band of discrete storms stretching southwest from Palm Beach
   County to southern Collier/northwest Monroe Counties.  A few will
   continue to evolve into supercells with transient low-level rotation
   couplets.  Recent couplets include storms along central border area
   of Palm Beach/Broward Counties, across eastern Palm Beach County,
   southeast Collier County, and moving toward the central coast of
   mainland Monroe County.  Moderate instability along and south of
   these storms combined with strong deep-layer and low-level shear
   suggests a tornado threat persists with this activity, as area VWP
   data indicated 0-1 km SRH of 350-400 m2/s2.

   ..Peters.. 01/23/2017


   LAT...LON   25058183 27247982 27027907 25597914 24597947 25088011
               24658092 24408159 24528227 25058183 

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