Islamorada, Florida Weather Forecast Discussion

223
FXUS62 KKEY 201440
AFDKEY
Area Forecast Discussion
National Weather Service Key West FL
1040 AM EDT Sat Sep 20 2025
...New DISCUSSION, MARINE, AVIATION, PREV DISCUSSION...
.DISCUSSION...
Issued at 1025 AM EDT Sat Sep 20 2025
Surface analysis places a sprawling area of high pressure over
the Southeast, supporting light to gentle north to northeasterly
breezes and mostly sunny skies on this September morning across
the Florida Keys and the adjacent coastal waters. The 12z sounding
at KEY sampled a moist, yet stable layer from the surface to
around 850 mb, with an even more stable and dry layer throughout
the rest of the troposphere.
The inherited forecast calls for slight rain and thunder chances.
Although it is tempting to take PoPs out completely for today,
there remains a low possibility of any convection over South
Florida diving southwestward towards the Middle and Upper Keys
late this afternoon or this evening. In addition, the mean low-
level northeasterlies may support a broken cumulus cloud line to
form along portions of the Lower Keys. Given these possibilities,
will stick with the current forecast.
&&
.MARINE...
Issued at 1025 AM EDT Sat Sep 20 2025
No watches, warnings, or advisories are currently in effect for
the Florida Keys waters. From synopsis, as drier air continues to
push across the Keys and high pressure builds across the Eastern
Seaboard, drier conditions, coupled with light to gentle northeast
to east breezes, are expected through the rest of the weekend.
This week, moisture will return, but winds will remain light to
gentle.
&&
.AVIATION...
(15Z TAFS)
Issued at 1025 AM EDT Sat Sep 20 2025
VFR conditions will prevail at both island terminals through 12z
Sunday morning. Near-surface winds will remain out of the north to
northeast at 5 to 8 knots.
&&
.PRELIMINARY POINT TEMPS/POPS...
Key West  89  79  89  78 /  20  30  30  40
Marathon  88  79  88  79 /  20  30  30  40
&&
.KEY WATCHES/WARNINGS/ADVISORIES...
FL...None.
GM...None.
&&
$$
Public/Marine/Fire...BT
Aviation/Nowcasts....BT
Data Acquisition.....BT
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NWS KEY Office Area Forecast Discussion