Area Forecast Discussion
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000
FXUS62 KKEY 200217
AFDKEY

AREA FORECAST DISCUSSION FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
920 PM EST FRI DEC 19 2014

.DISCUSSION...
.CURRENTLY...
KBYX DETECTS NO PRECIPITATION ECHOES. SKIES OVER THE ISLAND CHAIN
ARE MOSTLY CLEAR. WINDS OVER LAND ARE NORTHEAST TO EAST AT 5 TO 10
MPH. C-MAN WINDS...ON AVERAGE...ARE EAST NEAR 10 KNOTS. TEMPERATURES
ARE NEAR 70 DEGREES.

.SHORT TERM (OVERNIGHT)...
IN THE LOW LEVELS OF THE ATMOSPHERE...AN AREA OF LOW PRESSURE WILL
PROGRESS EASTWARD ACROSS THE WESTERN GULF OF MEXICO OVERNIGHT. IN
THE MID TO UPPER LEVELS OF THE ATMOSPHERE...ZONAL FLOW WILL PREVAIL
TONIGHT. THE 00Z KKEY SOUNDING IS STABLE AND QUITE DRY FOR THIS TIME
OF YEAR...WITH A PRECIPITABLE WATER (PWAT) VALUE JUST ABOVE THREE
QUARTERS OF AN INCH. ATMOSPHERIC MOISTURE WILL INCREASE OVERNIGHT.
BY SUNRISE SATURDAY...PWAT VALUES SHOULD BE CLOSE TO ONE AND ONE
QUARTER OF AN INCH...WHICH IS NEAR NORMAL FOR THE LATTER HALF OF
DECEMBER. DESPITE THIS ANTICIPATED INCREASE IN ATMOSPHERIC
MOISTURE...THE STABLE AIR MASS IN PLACE WILL BE RESPONSIBLE FOR NO
CHANCE OF RAINFALL IN THE FLORIDA KEYS OVERNIGHT.

&&

.MARINE...
GENTLE TO MODERATE EAST BREEZES WILL PREVAIL ON ALL KEYS COASTAL
WATERS OVERNIGHT. NO ADVISORIES OR CAUTIONARY HEADLINES EXPECTED
TONIGHT THROUGH AT LEAST TUESDAY.

&&

.AVIATION...
VFR CONDITIONS WILL PERSIST THROUGH AT LEAST 12Z AT BOTH THE KEY
WEST INTERNATIONAL AND MARATHON ISLAND TERMINALS. NORTHEAST WINDS
WILL VEER OVERNIGHT AND BECOME EAST-SOUTHEASTERLY BY SUNRISE.

&&

.CLIMATE...
ON THIS DATE IN FLORIDA KEYS WEATHER HISTORY...IN 1901...THE LOW
TEMPERATURE IN KEY WEST WAS 51 DEGREES. THIS SET THE DAILY RECORD
FOR MINIMUM TEMPERATURE MEASURED IN KEY WEST ON DECEMBER 19TH...A
RECORD WHICH STILL STANDS 113 YEARS LATER. TEMPERATURE RECORDS AT
KEY WEST DATE BACK TO 1872.

&&

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

&&

$$

PUBLIC/MARINE/FIRE/DIGITAL...BS
AVIATION/CLIMATE.............BWC

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