Mesoscale Discussion 1791
   NWS Storm Prediction Center Norman OK
   0124 PM CST Wed Nov 11 2020

   Areas affected...southern Florida Peninsula

   Concerning...Severe potential...Watch unlikely 

   Valid 111924Z - 112015Z

   CORRECTED SECOND SENTENCE OF SUMMARY

   Probability of Watch Issuance...20 percent

   SUMMARY...A few locally strong wind gusts and perhaps a brief
   tornado are possible this afternoon over the southern Florida
   Peninsula. Overall threat does not appear sufficient to warrant an
   additional WW, but WW 507 can be locally extended a few counties if
   needed.

   DISCUSSION...As of early afternoon, convection within one of the
   outer bands of hurricane Eta has undergone some strengthening,
   primarily from the western FL Keys northeastward into the
   southwestern portion of the FL Peninsula. Visible satellite imagery
   shows several cloud breaks, and surface temperatures have risen to
   the mid 80s F contributing to destabilization of the moist boundary
   layer. Latest objective analysis show MLCAPE from 1000-1500 J/kg in
   this region. However, tendency has been for low-level winds to
   slowly veer as the center of ETA continues northward. This has
   resulted in a modest reduction in size of 0-1 km hodographs. The 18Z
   RAOB from Miami indicates 0-1 km storm relative helicity around 170
   m2/s2, down from 220+ m2/s2 on the 12Z RAOB. Nevertheless, this
   parameter space remains adequate for a few stronger storms capable
   of producing locally strong wind gusts and perhaps a brief tornado
   or two.

   ..Dial/Hart.. 11/11/2020

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

   ATTN...WFO...MFL...MLB...

   LAT...LON   25308112 26308104 26998120 27348055 26678023 25548057
               25308112