665 
FXUS62 KKEY 190817
AFDKEY

Area Forecast Discussion
National Weather Service Key West FL
417 AM EDT Tue Oct 19 2021

.DISCUSSION...
A weak surface front moved through the Keys yesterday, and has 
ushered in a cooler and drier air mass across the Florida 
Peninsula. The frontal boundary has degenerated into a stationary 
front near Cuba which will reside near Cuba through Wednesday 
night.

A ridge of high pressure will continue to expand across the 
Eastern Seaboard and the Southeastern United States today and 
promote fair weather conditions across the Keys and the 
Southeastern U.S. United States through Wednesday night. In
additions, fresh northeast to east breezes will continue through 
Thursday. 

The cooler and drier air has caused dewpoint temperatures to fall
over the last 12 hours. Currently, dewpoints are near the mid 
60s, and there is a chance that dewpoints drop to the lower 60s 
later this morning. Daytime high temperatures will be near the 
mid 80s, and the overnight low temperatures in the mid 70s 
through Wednesday.

Late Wednesday night through Thursday, sky cover and rain chances
will increase due to an increase in moisture content and moderate 
instability, which will result in a wet and unsettled weather 
pattern through Saturday. Early next week, a more seasonable 
weather pattern will commence.

&&

.MARINE...
Northeast to east breezes will prevail over the Florida Keys and 
local passages through Wednesday night, with winds ranging from 
15 to 20 kts. Thursday's breezes are expected to veer to the east
for a short period of time before going back to the northeast to 
east. Small Craft Should Exercise Caution due to the fresh breeze
today.

&&

.AVIATION...
VFR conditions will prevail for both EYW and MTH into Tuesday night. 
Dry air advected in from the northeast will keep rain chances below 
average throughout the day. Surface winds will be out of the 
northeast at 8 to 11 knots with occasional gusts nearing 20 
knots.

&&

.CLIMATE...
On this date in Keys weather history in 1876, a Hurricane moved 
north northeast from Havana, with the eye passing over Key West 
where the minimum pressure was 28.73" and the peak wind was 88 mph 
on the south side of the eye wall. The eye lasted 2 hours and 15 
minutes in Key West.

&&

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

$$

Public/Marine/Fire...TW
Aviation/Nowcasts....JAM 
Data Acquisition.....JAM

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