021
FXUS62 KKEY 271523
AFDKEY
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KEY WEST FL
1123 AM EDT FRI JUN 27 2025
..NEW DISCUSSION, MARINE, AVIATION
DISCUSSION
ISSUED AT 1108 AM EDT FRI JUN 27 2025
WHAT A DIFFERENCE TWENTY-FOUR HOURS MAKES. THE 12Z MORNING
SOUNDING AT KEY SAMPLED MODEST HEIGHT RISES BETWEEN 700-500 MB, AS
A MID-LEVEL LOW CONTINUES TO WEAKEN AND LIFT NORTHWARD ACROSS THE
SPINE OF THE FLORIDA PENINSULA. THE SOUNDING ALSO HIGHLIGHTED THE
FIRST SIGNS OF A SAHARAN AIR LAYER (SAL), WITH SUBSTANTIAL DRYING
IN THE 600-700 ISOBARIC LAYER. THE COMBINATION OF THE LOW SLIDING
NORTHWARD AND THE MID-LEVEL DRYING HAS ALLOWED VIRTUALLY ALL
EARLY MORNING SHOWER AND THUNDERSTORM ACTIVITY TO QUICKLY WANE.
SKIES ARE GENERALLY PARTLY CLOUDY ACROSS THE KEYS, WITH ONLY
PASSING LOW-LEVEL CUMULUS STREAMING IN THE LOW-LEVEL EAST
SOUTHEASTERLIES AND UPPER-LEVEL CIRRUS STREAMING NORTHEASTWARD
FROM A DISTURBANCE NEAR THE BAY OF CAMPECHE. FOR THE REST OF
TODAY, ISOLATED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE,
ALTHOUGH COVERAGE IS EXPECTED TO BE MUCH LESS THAN THE PAST
SEVERAL FORECAST PERIODS.
MARINE
ISSUED AT 1108 AM EDT FRI JUN 27 2025
NO WATCHES, WARNINGS, OR ADVISORIES ARE CURRENTLY IN EFFECT FOR
THE COASTAL WATERS OF THE FLORIDA KEYS. FROM SYNOPSIS, AN UPPER-
LEVEL LOW CENTERED NEAR THE EAST COAST OF FLORIDA WILL LIFT
NORTHWARD AND WEAKEN TODAY. BROAD SURFACE RIDGING WILL REBUILD
OVER THE ATLANTIC AND SUPPORT GENTLE TO MODERATE EAST TO
SOUTHEASTERLY BREEZES ACROSS FLORIDA KEYS WATERS. A SAHARAN AIR
LAYER WILL LIMIT SHOWER COVERAGE OVER THE WEEKEND, BUT BURSTS OF
SHOWERS OR THUNDERSTORMS CANNOT BE RULED OUT.
AVIATION
(15Z TAFS)
ISSUED AT 1108 AM EDT FRI JUN 27 2025
AS MID-LEVEL SAHARAN DUST CONTINUES TO PUSH WESTWARD TOWARDS THE
FLORIDA KEYS, VFR CONDITIONS WILL PREVAIL AT THE TERMINALS, WITH
LOW MEASURABLE RAIN CHANCES. NEAR-SURFACE WINDS WILL REMAIN OUT OF
THE EAST TO SOUTHEAST AT 7 TO 10 KNOTS.
PRELIMINARY POINT TEMPS/POPS
KEY WEST 89 82 90 82 / 30 20 20 10
MARATHON 90 82 90 82 / 30 20 20 20
KEY WATCHES/WARNINGS/ADVISORIES
FL...NONE.
GM...NONE.
PUBLIC/MARINE/FIRE...BT
AVIATION/NOWCASTS....BT
DATA ACQUISITION.....BT
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