Area Forecast Discussion
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FXUS62 KKEY 120210

Area Forecast Discussion
National Weather Service Key West FL
910 PM EST Mon Dec 11 2017

KBYX detects no precipitation echoes. Skies over the island chain
are mostly clear. Winds over land are north to northeast near 10
mph. C-MAN winds, on average, are north to northeast at 10 to 15
knots. Temperatures are in the lower 60s.

.SHORT TERM (Overnight)...
In the low levels of the atmosphere, a ridge of high pressure over
South Texas will extend eastward over South Florida overnight. In
the mid levels of the atmosphere, a trough of low pressure will be
located over the Florida peninsula tonight. In the upper levels of
the atmosphere, zonal flow will prevail overnight. The 00z KKEY
sounding is extremely stable and exceptionally dry, with a
precipitable water (PWAT) value just above one quarter of an inch.
Atmospheric moisture will increase overnight. By sunrise Tuesday,
PWAT values should be just above one half of an inch, which is
still vastly dry. The extremely stable and exceptionally dry air
mass in place over the Florida Keys will be responsible for a near
zero chance of rain tonight. Low temperatures overnight will be
around ten degrees below normal for this time of year.


Moderate north breezes will prevail on all Keys coastal waters
overnight. No advisories expected tonight and Tuesday. A Small
Craft Advisory may be required for the coastal waters of the
Florida Straits Tuesday night. No advisories expected Wednesday
through Friday. A Small Craft Advisory will likely be required for
the coastal waters of the Gulf of Mexico and Atlantic Friday night
and Saturday. A Small Craft Advisory may be required for the
coastal waters of Florida Bay Friday night and Saturday. No
advisories expected Saturday night.


VFR conditions will prevail at EYW and MTH tonight and Tuesday.
Sustained north to northeast winds near 15 knots from just off the
surface to about 3,000 feet will back to northwest and increase to
15 to 20 knots Tuesday afternoon.


On this date in Florida Keys weather history, in 1948, 1.59 inches
of rain fell in Key West. This set the daily record for maximum
rainfall measured in Key West on December 11th, a record which
still stands 69 years later. Rainfall records at Key West date
back to 1871.





Data Collection......11

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