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Area Forecast Discussion (AFD)

Issued by Key West, FL (KEY)

FXUS62 KKEY 210314

Area Forecast Discussion
National Weather Service Key West FL
1014 PM EST Sat Jan 20 2018

Under mostly cloudy skies with a gentle to moderate breezes 
blowing from the northeast to east across the island chain, 
temperatures are in the middle 60s. KBYX Doppler radar shows 
elevated echoes approaching from the west/southwest, similar to
this time yesterday evening. The other radar returns to our north
are in the form of chaff. 

Will need to continue watching the echoes on radar that are
approaching from the west. The evening local sounding suggests
that these will need to fall through a very deep and dry
layer...posing a low confidence outlook of making it to the
surface. At this time, will keep any mention of measurable
precipitation out of the forecast. The recently updated zone
forecast only modified the initial winds by a small degree, just 
to come in line with the most recent observations.


There will more mixing of the winds over the Straits of Florida
overnight, and a few of the taller CMANs are registering that
presently. A small craft advisory will be maintained there.
Elsewhere across cooler waters, expect gentle to moderate 
northeast to east breezes into Sunday morning. 


While VFR conditions will prevail at EYW and MTH, moisture will move 
into the region in the form of broken clouds from FL140 to FL200 
until the afternoon timeframe when these clouds will erode as 
skies become scattered. Northeast to east winds of 15 to 25 knots 
expected from just off the surface to about 3,000 feet.


On this date in Florida Keys weather history, in 1877, the high 
temperature in Key West was 86 degrees. This set the daily record 
for maximum temperature measured in Key West on January 20th, a 
record which still stands 141 years later. Temperature records at 
Key West date back to 1872.


GM...Small Craft Advisory GMZ052>055-072>075.



Data Collection......Chesser

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