|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.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 24598104 24408175 24538235 25498266 27048247 27908104
28138039 27618004 26527988 25168019 24598104
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