712 
FXUS62 KKEY 190038
AFDKEY

Area Forecast Discussion
National Weather Service Key West FL
838 PM EDT Mon Oct 18 2021

.DISCUSSION...
High pressure anchored near Tennessee is continuing to bridge 
into the Florida Keys and coastal waters. The front that was on 
the leading edge of the air mass change is undergoing frontolysis
south of our area, and is no longer a sensible weather concern 
for the Keys. There has been a noticeable change in surface 
dewpoint over the past few hours, dropping around 4 degrees since 
late afternoon heading into the mid 60s. The stratocu deck which 
was around the Lower Keys earlier is beginning to push off to the 
southwest and will likely mix out overnight. The cloud deck is 
around 9 kft, which is right at the base of the subsidence 
inversion. The evening sounding from Key West shows a gradual, but
continuing, drying trend, as overall PWAT has dropped below 1.5 
inches. The drier air, and near zero chance of rain, should 
persist through tomorrow evening, if not longer, as the 
aforementioned ridge begins to slide eastward towards the 
Atlantic. Winds across the marine waters, which is the only 
sensible weather concern at the moment, will persist out of the 
northeast to east from 15 to 20 knots overnight and 
tomorrow. Overall, no changes are necessary to the afternoon 
forecast package, as conditions look to be a little cooler and 
less humid than the past week.

&&

.MARINE...
Mainly moderate northeast to east breezes are expected to persist
over the Florida Keys coastal waters through at least least
Wednesday. No precipitation is expected through tomorrow, with
only a slight chance of isolated showers tomorrow night. With the
moderate breezes, small craft should exercise caution overnight
and through tomorrow on all unprotected waters. 

&&

.AVIATION...
VFR conditions will prevail at both EYW and MTH island terminals 
through Tuesday evening. Winds will remain out of the northeast to
east at 7 to 10 knots with occasional gusts near 20 knots, mainly
at EYW.

&&

.KEY WATCHES/WARNINGS/ADVISORIES...
FL...None.
GM...None.
&&

$$

Public/Marine/Fire...Devanas
Aviation/Nowcasts....Williams
Data Acquisition.....AP

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