Area Forecast Discussion
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542
FXUS62 KKEY 130340
AFDKEY

Area Forecast Discussion
National Weather Service Key West FL
1040 PM EST Tue Dec 12 2017

.DISCUSSION...
A few light echoes oriented in a thin line crossed the island
chain earlier this evening without much fanfare. There are a few
additional echoes of similar intensity currently upstream from the
island chain. Otherwise, skies are partly cloudy, winds are
turning to the northwest and accelerating, and temperatures are in
middle 60s to around 70 along the island chain.

The late evening local sounding showed a deeper and somewhat more
prounounced northwest wind when compared to this morning. But this
is still ahead of the cold front which should push through in the
very near term. Winds will continue to accelerate through the very
early hours of Wednesday. Was tempted to remove the mention of
rain on a late evening update, but with a few patches of weak
echoes upstream, decided to let the mention remain through late
this evening. All the other sensible weather elements are
advertised well on the afternoon zone issuance, so will let that
forecast remain with no updates planned late this evening, as
winds turn more to the northwest to north and freshen. No reason
to deviate from the spread of low temperatures expected from the
Upper to Lower Keys overnight.

&&

.MARINE...
The only adjustments to the recently updated coastal waters
forecast was to initiate winds closer to the most recent
observations. A small craft advisory will be maintained across all
marine groupings due to the wind surge that is imminent. Also
left isolated light showers in through late this evening based on
the few echoes currently on radar in the extreme southeast Gulf of
Mexico.

&&

.AVIATION...
The threat of sub-VFR conditions at the KEYW and KMTH terminals is
small and limited to very late this evening. Current echoes
upstream from the islands are of similar intensity to previous
echoes earlier this evening. As such, will keep VFR advertised
both locations as winds turn to the northwest/north and freshen
through the overnight period.

&&

.KEY WATCHES/WARNINGS/ADVISORIES...
FL...None.
GM...Small Craft Advisory GMZ031>035-042>044-052>055-072>075.

&&

$$

Public/Marine/Fire...04
Aviation/Nowcasts....04
Data Collection......11

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