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000
FXUS62 KKEY 211436
AFDKEY

AREA FORECAST DISCUSSION FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
1040 AM EDT THU AUG 21 2014

.DISCUSSION...
.CURRENTLY...
KBYX DETECTS WIDELY SEPARATED SHOWERS THROUGHOUT THE FORECAST AREA.
SKIES OVER THE ISLAND CHAIN ARE PARTLY CLOUDY. WINDS OVER LAND ARE
EAST TO SOUTHEAST AT 5 TO 10 MPH. C-MAN WINDS...ON AVERAGE...ARE
EAST TO SOUTHEAST NEAR 10 KNOTS. TEMPERATURES ARE RANGE FROM THE MID
80S IN RAIN COOLED AREAS TO NEAR 90 DEGREES ELSEWHERE.

.SHORT TERM (THIS AFTERNOON)...
IN THE LOW LEVELS OF THE ATMOSPHERE...AN ATLANTIC RIDGE OF HIGH
PRESSURE WILL EXTEND ACROSS SOUTH CENTRAL FLORIDA THIS AFTERNOON. IN
THE MID TO UPPER LEVELS OF THE ATMOSPHERE...AN AREA OF HIGH PRESSURE
WILL BE CENTERED OVER LOUISIANA TODAY. THE 12Z KKEY SOUNDING IS VERY
UNSTABLE AND TYPICALLY MOIST FOR THIS TIME OF YEAR...WITH A
PRECIPITABLE WATER VALUE JUST ABOVE ONE AND THREE QUARTERS OF AN
INCH. ATMOSPHERIC MOISTURE SHOULD REMAIN CONSTANT THIS AFTERNOON.
DESPITE AMPLE ATMOSPHERIC INSTABILITY AND ADEQUATE MOISTURE IN PLACE
FOR CONVECTION...ANTICYCLONIC FLOW IN ALL LEVELS OF THE ATMOSPHERE
SHOULD LIMIT POPS TO SLIGHT CHANCE CATEGORY THIS AFTERNOON.

&&

.MARINE...
GENTLE EAST TO SOUTHEAST BREEZES WILL PREVAIL ON ALL KEYS COASTAL
WATERS THIS AFTERNOON. NO ADVISORIES OR CAUTIONARY HEADLINES
EXPECTED TODAY THROUGH AT LEAST MONDAY NIGHT.

&&

.AVIATION...
SHOWERS HAVE INITIATED AROUND THE FLORIDA KEYS AT THIS TIME...AND A
FEW PASSING SHOWERS ARE POSSIBLE IN THE TERMINAL VICINITIES THROUGH
17Z. AFTER THAT TIME...WINDS SHOULD GRADUALLY BACK AND LOW LEVEL
WINDS SHOULD WEAKEN SLIGHTLY TO ALLOW LOCAL CLOUD LINES TO FORM
ACROSS THE KEYS. THE 15Z TAF AMENDMENT SHOULD INCLUDE A MORE
DEFINITIVE TEMPO GROUP BASED ON THE TRENDS IN CLOUD LINE DEVELOPMENT
AT THAT TIME.

&&

.CLIMATE...
ON THIS DATE IN KEYS WEATHER HISTORY...IN 1923...THE LOW TEMPERATURE
IN KEY WEST WAS 71 DEGREES. THIS SET THE DAILY RECORD FOR MINIMUM
TEMPERATURE MEASURED IN KEY WEST ON AUGUST 21ST...A RECORD WHICH
STILL STANDS 91 YEARS LATER. TEMPERATURE RECORDS AT KEY WEST DATE
BACK TO 1872.

&&

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

&&

$$

PUBLIC/MARINE/FIRE/CLIMATE/DIGITAL...BS
AVIATION/NOWCASTS....................MSB
DATA ACQUISITION.....................FLING

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