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Mesoscale Discussion 1637
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   Mesoscale Discussion 1637
   NWS Storm Prediction Center Norman OK
   0732 AM CDT Sun Sep 10 2017

   Areas affected...Florida Keys...South and Central Florida Peninsula

   Concerning...Tornado Watch 482...

   Valid 101232Z - 101430Z

   The severe weather threat for Tornado Watch 482 continues.

   SUMMARY...The tornado threat associated with Hurricane Irma, will
   continue along across the southern and central Florida Peninsula
   this morning. A tornado or two may occur with the greatest threat
   along the coast from Miami northward into east-central Florida.

   DISCUSSION...The National Hurricane Center is forecasting the center
   of Hurricane Irma to continue moving north-northwestward over the
   next few hours from just to the east of Key West into the open
   waters north of the Florida Keys. Rainbands extend northward about
   300 statute miles from Irma's center. One band of convection is
   present from the central Florida peninsula extending
   east-southeastward to near Palm Beach. Another broader band of
   convection is located to the south of Lake Okeechobee extending
   southeastward to near the coast at Miami. The stronger instability
   is analyzed to the northeast of Lake Okeechobee according to the RAP
   with MLCAPE values in the 1000 to 2000 J/kg range. This combined
   with strong low-level shear according to the Melbourne and Miami
   WSR-88D VWPs will continue to be favorable for a tornado threat.
   Tornadoes will most likely occur with discrete rotating cells that
   move inland along the east coast of Florida this morning.

   ..Broyles/Edwards.. 09/10/2017

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

   ATTN...WFO...MFL...MLB...KEY...TBW...

   LAT...LON   24598104 24408175 24538235 25498266 27048247 27908104
               28138039 27618004 26527988 25168019 24598104 

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Page last modified: September 10, 2017
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