420
FXUS62 KKEY 221517
AFDKEY

Area Forecast Discussion
National Weather Service Key West FL
1017 AM EST Fri Nov 22 2024

...New DISCUSSION, MARINE, AVIATION...

.DISCUSSION...
Issued at 1010 AM EST Fri Nov 22 2024
The first continental air burst moved across the Florida Keys
over the past two days. Dew points at the Marathon airport dropped
into the upper 40s overnight while the Key West ASOS measured dew
points in the mid 50s, a merciful reprieve compared to Hurricane
Rafael`s passage west of the Keys 2.5 weeks ago. The KKEY 12Z
sounding measured a PWAT value below the 10th percentile for the
day. Most of the moisture remains confined to the lower levels
beneath a 5.5 C inversion. Satellite obs support the sounding
measurements; swaths of low- altitude stratocumulus clouds are
present across the Lower Keys, but a shadow from the Florida
Peninsula continues to keep skies over the Middle and Upper Keys
relatively cloud free. Early morning winds decreased below breezy
thresholds, and marine winds are forecast to decrease beneath
Small Craft Advisory thresholds.

Today, little change is expected to the inherited forecast.
Marine breezes are forecast to drop from fresh to moderate with
slight northerly veering. Highs across the Keys will be limited to
the low to mid 70s. After a long and very active tropical season,
mid-latitude air finally arrived in the Keys.

&&

.MARINE...
Issued at 1010 AM EST Fri Nov 22 2024
From synopsis, northwest to north breezes slackened this morning
and will continue into this afternoon and this evening. The
resulting moderate breezes out of the north will turn northeast
and east over the beginning of next week. Weather conditions are
still expected to remain dry through the end of this week and into
next week.

&&

.AVIATION...
(15Z TAFS)
Issued at 1010 AM EST Fri Nov 22 2024
VFR and dry conditions will continue to prevail at both terminals
through the afternoon. EYW will maintain SCT stratocu coverage
through the afternoon, while MTH will remain largely cloud-free.
Winds have become north to northeast with a surge off of S
Florida, but this will revert back to northwest to north by early
afternoon with speeds gradually slackening through the remainder
of the afternoon.

&&

.CLIMATE...
On this day in Keys weather history in 2006, the daily record low
temperature of 55F was recorded at Key West International Airport.
Temperature data for Key West dates back to 1872.

&&

.KEY WATCHES/WARNINGS/ADVISORIES...
FL...None.
GM...Small Craft Advisory until 10 AM EST this morning for GMZ031>035-
     042>044-052>055-072>075.

&&

$$

Public/Marine/Fire...AJP
Aviation/Nowcasts....LIW
Data Acquisition.....MC

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