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000
FXUS62 KKEY 081533
AFDKEY

AREA FORECAST DISCUSSION FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
1033 AM EST SAT MAR 8 2014

.DISCUSSION...A CHILLY START THIS MORNING ACROSS THE FLORIDA
KEYS...WITH TEMPERATURES RANGING FROM NEAR 60 IN THE UPPER KEYS TO
THE MID 60S ACROSS THE LOWER KEYS. A SHORT EPISODE OF COLD AIR
ADVECTION KNOCKED TEN DEGREES OFF THE MORNING LOWS. NORTHERLY WINDS
AVERAGED 20 KNOTS AS RECENTLY AS 10 PM LAST NIGHT. SINCE THEN...WINDS
HAVE VEERED TO THE NORTHEAST AND HAVE DECREASED...AVERAGING NEAR 10
KNOTS AT THE AREA C-MAN STATIONS. THE RADAR REMAINS ECHO FREE AND
SKIES ARE PARTLY TO MOSTLY CLOUDY ACROSS THE LOWER KEYS...AND MOSTLY
SUNNY IN THE UPPER KEYS.

.SHORT TERM...HIGH PRESSURE ACROSS NORTHERN FLORIDA WILL SAG
SOUTHWARD TODAY AND TONIGHT. IN RESPONSE...WINDS WILL VEER SLIGHTLY
FROM NORTHEAST TODAY TO EAST NORTHEAST TONIGHT. CLOUD COVER REMAINS A
CHALLENGE. THE MORNING RAOB OBSERVATION REVEALS A SIGNIFICANT
INVERSION BASED JUST ABOVE 900 MB. THUS...ANY BOUNDARY LAYER
MOISTURE...WHETHER FROM COLD AIR ADVECTION LIKE THIS MORNING...OR
WEAK ISENTROPIC ASCENT WHICH IS EXPECTED TONIGHT...WILL ACCUMULATE
UNDERNEATH THE INVERSION. PARTLY TO MOSTLY CLOUDY SKIES WILL PERSIST
TODAY AND TONIGHT ACROSS THE LOWER AND MIDDLE KEYS. HIGHS TODAY WILL
STRUGGLE TO REACH 70...EXCEPT IN THE UPPER KEYS WHERE THEY WILL
LIKELY REACH 75. TEMPERATURES TONIGHT WILL FALL BACK INTO THE MID TO
UPPER 60S. UPDATED THE ZONES TO MANAGE THE PERSISTENT CLOUD COVER.

&&

.MARINE...HIGH PRESSURE WILL REMAIN ACROSS THE SOUTHEASTERN UNITED
STATES TODAY THROUGH MONDAY...AND WILL SHIFT EASTWARD INTO THE
ATLANTIC ON TUESDAY. NORTHEAST BREEZES THIS AFTERNOON WILL TURN EAST
ON SUNDAY...AND SOUTHEAST BY TUESDAY.


&&

.AVIATION...MAINLY VFR CONDITIONS WILL PREVAIL AT KEY WEST
INTERNATIONAL AND MARATHON THROUGH THE FORECAST PERIOD. BRIEF MVFR
CIGS ARE POSSIBLE WITH PASSING CLOUD LINES. NORTHEAST WINDS LESS THAN
10 KNOTS.


&&

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

$$

PUBLIC/MARINE.........CLR
AVIATION/NOWCASTS.....JOHNSON
DATA COLLECTION.......MSB

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