Area Forecast Discussion
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FXUS62 KKEY 301318

Area Forecast Discussion
National Weather Service Key West FL
918 AM EDT Sun Apr 30 2017

KBYX detects isolated showers throughout the forecast area. Skies
over the island chain are partly cloudy. Winds over land are east
to southeast at 15 to 20 mph. C-MAN winds, on average, are
southeast near 20 knots. Temperatures are in the lower 80s.

.SHORT TERM (This afternoon)...
In the low to mid levels of atmosphere, a large area of high
pressure will be centered over the Western Atlantic Ocean, east of
the Carolinas, this afternoon. In the upper levels of the
atmosphere, a ridge of high pressure will be located just east of
the Florida peninsula today. The 12z KKEY sounding is moderately
unstable and seasonably moist, with a precipitable water (PWAT)
value just under one and one half of an inch. Atmospheric moisture
will decrease this afternoon. By sunset this evening, PWAT values
will be just above one and one quarter of an inch, which is near
normal for the end of April. Large scale subsidence will be
responsible for no more than slight chance POPs today.


A Small Craft Advisory is in effect for all Keys coastal waters
this afternoon due to sustained east to southeast surface winds
near 20 knots. A Small Craft Advisory will likely be required for
all Keys coastal waters tonight. A Small Craft Advisory may be
required for the coastal waters of the Florida Straits Monday. No
advisories expected Monday night through at least Thursday night.


VFR conditions are expected at the island terminals this
afternoon. Surface winds will be east to southeast at 10 to 15
knots, with gusts near 25 knots.


On this date in Florida Keys weather history, in 1992, the low
temperature at Key West International Airport was 59 degrees. This
set the daily record for minimum temperature measured in Key West
on April 30th, a record which still stands 25 years later. In
addition, this is the latest date in the spring season on which
the temperature fell below 60 degrees in Key West. Temperature
records at Key West date back to 1872.


GM...Small Craft Advisory for GMZ031>035-042>044-052>055-072>075.



Data Collection......Fling

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