Area Forecast Discussion
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000
FXUS62 KKEY 211315
AFDKEY

Area Forecast Discussion
National Weather Service Key West FL
915 AM EDT Thu Jun 21 2018

.DISCUSSION...
.CURRENTLY...
KBYX detects isolated showers throughout the forecast area. Skies
over the island chain are mostly sunny. Winds over land are
southwest at 5 to 10 mph. C-MAN winds, on average, are southwest
to west near 10 knots. Temperatures are in the lower to mid 80s.

.SHORT TERM (This afternoon)...
In the low levels of the atmosphere, an Atlantic ridge of high
pressure will extend across the Florida Straits this afternoon. In
the mid levels of the atmosphere, an Atlantic ridge of high
pressure will extend across Cuba today. In the upper levels of the
atmosphere, a ridge of high pressure will be located over North
Florida this afternoon. The 12z KKEY sounding is moderately
unstable and seasonably moist, with a precipitable water (PWAT)
value just under one and three quarters of an inch. Atmospheric
moisture will increase this afternoon. By sunset this evening,
PWAT values should be just above one and three quarters of an
inch, which is near the 75th percentile for this time of year.
Despite this anticipated increase in atmospheric moisture,
anticyclonic flow in all levels of the atmosphere will be
responsible for no more than slight chance POPs today.

&&

.MARINE...
Gentle southwest to west breezes will prevail on all Keys coastal
waters this afternoon. No advisories or cautionary headlines
expected today through at least Monday night.

&&

.AVIATION...
VFR conditions will prevail at EYW and MTH, with light and mostly
west winds. There is the potential that a reverse cloud line will
develop, which would preferentially affect MTH with brief spells
of sub VFR ceilings.

&&

.CLIMATE...
On this date in Florida Keys weather history, in 1933, 3.99 inches
of rain fell in Key West. This set the daily record for maximum
rainfall measured in Key West on June 21st, a record which still
stands 85 years later. Rainfall records at Key West date back to
1871.

&&

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

&&

$$

Public/Marine/Fire...BS
Aviation/Nowcasts....11
Data Collection......BT

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