000
FXUS62 KKEY 280325
AFDKEY
AREA FORECAST DISCUSSION FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
1025 PM EST MON DEC 27 2010
.DISCUSSION...
CURRENTLY - COOL DRY CONDITIONS PREVAIL ACROSS THE AREA
TONIGHT...WITH TEMPERATURES GENERALLY IN THE LOWER 50S AND DEW POINTS
IN THE LOWER 40S. HIGH PRESSURE OVER THE MISSISSIPPI VALLEY AND THE
GULF OF MEXICO IS GENERATING MODERATE NORTHERLY FLOW ACROSS OUR AREA.
BREEZY WINDS HAVE DECREASED THIS EVENING...AND ARE MAINLY 10 TO 15
MPH...BUT GUSTINESS REMAINS. THE FLOW THROUGH THE LOWER LEVELS HAVE
BECOME MORE NORTHERLY AND DIRECTED OFF OF THE FLORIDA MAINLAND. AS A
RESULT...CLOUD COVER HAS RECENTLY CLEARED OUT OF THE LOWER AND
MIDDLE KEYS...LEAVING CLEAR SKIES ACROSS THE ISLAND CHAIN.
SHORT TERM UPDATE (OVERNIGHT) - THE PREVIOUSLY MENTIONED HIGH
PRESSURE SYSTEM WILL SLIDE A BIT FURTHER SOUTHEASTWARD AND GRADUALLY
WEAKEN. NORTHERLY WINDS MAY LULL A BIT FURTHER TONIGHT BUT A SUBTLE
SURGE IS EXPECTED LATE TONIGHT AND IN THE EARLY DAY TIME HOURS DUE TO
COLD AIR DRAINAGE OFF OF SOUTH FLORIDA. HENCE...WILL MAINTAIN NEAR 15
MPH IN THE LOCAL FORECAST. NEAR RECORD LOW TEMPERATURES ARE EXPECTED
IN THE KEYS TONIGHT. EXTREME SOUTH FLORIDA IS ALREADY NOSING INTO THE
LOWER 40S. IN ADDITION...THE KEY WEST AIRPORT RECORD FOR THE 28TH IS
51 DEGREES...JUST ONE DEGREE BELOW THE CURRENT KEY WEST TEMPERATURE.
ADVERTISED LOWS FOR TONIGHT APPEAR ON TRACK. WILL ONLY ADJUST SKY
COVER IN THE LOCAL FORECAST.
&&
.MARINE...
MODERATE GUSTY NORTH BREEZES WILL PREVAIL ON KEYS WATERS THROUGH
MUCH OF THE NIGHT. A SUBTLE WIND SURGE IS EXPECTED LATE TONIGHT INTO
THE EARLY DAY TIME HOURS DUE TO COOL AIR DRAINAGE OFF OF SOUTH
FLORIDA. WILL MAINTAIN THE CAUTION IN THE FLORIDA BAY...AND INSERT
TRANSITIONAL WORDING TO ACCOUNT FOR THE EXPECTED SURGE. THE SMALL
CRAFT ADVISORY FOR SEAS WILL REMAIN IN EFFECT DUE TO RESIDUAL SEAS.
THE HIGHEST SEAS CAN BE EXPECTED IN SWELLS MOVING INTO OUR WESTERN
WATERS.
&&
.AVIATION...
WE EXPECT VFR CONDITIONS OVERNIGHT AT THE KEY WEST AND MARATHON
TERMINALS...WITH SKC-FEW CLOUDS. NORTH WINDS TO 15 KNOTS
OCCASIONALLY WILL CREATE CROSSWINDS GREATER THAN 10 KNOTS ON OUR
EAST-WEST RUNWAYS.
&&
.KEY WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
GM...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS UNTIL 10 AM EST TUESDAY FOR
GMZ032-GMZ033-GMZ052-GMZ053-GMZ054-GMZ072-GMZ073-GMZ074-GMZ075.
&&
$$
PUBLIC/MARINE.........11
AVIATION/NOWCASTS.....DFM
DATA COLLECTION.......PARKE
VISIT US ON THE WEB AT WWW.WEATHER.GOV/KEYWEST
