Area Forecast Discussion
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000
FXUS62 KKEY 300117
AFDKEY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KEY WEST FL
920 PM EDT MON JUN 29 2015

.DISCUSSION...
.CURRENTLY...
KBYX DETECTS NO PRECIPITATION ECHOES IN THE FORECAST AREA. SKIES
OVER THE ISLAND CHAIN ARE PARTLY CLOUDY. WINDS OVER LAND ARE NORTH
TO NORTHEAST NEAR 5 MPH. C-MAN WINDS...ON AVERAGE...ARE VARIABLE AT
5 TO 10 KNOTS. TEMPERATURES ARE IN THE MID 80S.

.SHORT TERM (OVERNIGHT)...
IN THE LOW LEVELS OF THE ATMOSPHERE...AN ATLANTIC RIDGE OF HIGH
PRESSURE WILL EXTEND ACROSS THE FLORIDA KEYS OVERNIGHT. IN THE MID
LEVELS OF THE ATMOSPHERE...AN ATLANTIC RIDGE OF HIGH PRESSURE WILL
EXTEND ACROSS THE FLORIDA STRAITS TONIGHT. IN THE UPPER LEVELS OF
THE ATMOSPHERE...A TROUGH OF LOW PRESSURE WILL BE CENTERED OVER THE
EAST CENTRAL GULF OF MEXICO OVERNIGHT. THE 00Z KKEY SOUNDING IS VERY
UNSTABLE...BUT QUITE DRY FOR THIS TIME OF YEAR...WITH A PRECIPITABLE
WATER (PWAT) VALUE JUST UNDER ONE AND ONE HALF OF AN INCH.
ATMOSPHERIC MOISTURE WILL INCREASE A BIT OVERNIGHT. BY SUNRISE
TUESDAY...PWAT VALUES WILL BE JUST ABOVE ONE AND ONE HALF OF AN
INCH...WHICH IS NEAR THE 25TH PERCENTILE FOR THE END OF JUNE. THE
RELATIVELY DRY AIR MASS IN PLACE WILL BE RESPONSIBLE FOR NO MORE
THAN DIME POPS TONIGHT.

&&

.MARINE...
LIGHT AND VARIABLE BREEZES WILL PREVAIL ON ALL KEYS COASTAL WATERS
OVERNIGHT. NO ADVISORIES OR CAUTIONARY HEADLINES EXPECTED TONIGHT
THROUGH AT LEAST TUESDAY MORNING.

&&

.AVIATION...
VFR CONDITIONS ARE EXPECTED AT THE ISLAND TERMINALS OVERNIGHT.
SURFACE WINDS WILL BE LIGHT AND VARIABLE.

&&

.CLIMATE...
ON THIS DATE IN FLORIDA KEYS WEATHER HISTORY...IN 1920...THE LOW
TEMPERATURE IN KEY WEST WAS 69 DEGREES. THIS SET THE DAILY RECORD
FOR MINIMUM TEMPERATURE MEASURED IN KEY WEST ON JUNE 29TH...A RECORD
WHICH STILL STANDS 95 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.............................11
DATA ACQUISITION.....................MP

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