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461
FXUS62 KKEY 201855
AFDKEY

AREA FORECAST DISCUSSION FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
255 PM EDT SUN APR 20 2014

.DISCUSSION...
.CURRENTLY...
SKIES ARE PARTLY CLOUDY ACROSS THE ISLAND CHAIN AND SURROUNDING
COASTAL WATERS THOUGH MORE DENSE CLOUD COVER IS FOUND ACROSS THE
NORTHERNMOST KEYS GULF MARINE ZONES. WINDS ARE NORTHWESTERLY ON THE
HIGH END OF THE 10 TO 15 KNOT RANGE. AN ASCAT PASS FROM THE MID
MORNING TIME PERIOD SHOWED A GRADUAL GRADIENT OF NEAR 10 KNOT WINDS
OVER THE DEEP GULF TO NEAR 15 KNOT WINDS OVER THE EXTREME
SOUTHEASTERN STRAITS. TEMPERATURES HAVE SETTLED OUT IN THE UPPER 70S
ACROSS THE ISLANDS WITH A FEW DEGREES MORE WARMING POSSIBLE BY LATE
IN THE AFTERNOON.

.FORECAST...HIGH PRESSURE WILL CONTINUE TO BUILD IN GRADUALLY BEHIND
A PASSING TOUGH ACROSS THE ENTIRE GULF OF MEXICO...AND WILL REMAIN
ENTRENCHED THROUGH THURSDAY. THEREAFTER...THE RIDGE AXIS WILL
GRADUALLY CROSS THE FLORIDA PENINSULA AND INTO THE OPEN ATLANTIC
THROUGH THE BALANCE OF THE NEXT SEVEN DAYS. ON THE SOUTH SIDE OF
THIS RIDGE GENERALLY LIGHT AND MESOSCALE DRIVEN WINDS WILL DOMINATE
THE FORECAST. LOW RAIN CHANCES WILL PREVAIL AND SKIES WILL GRADUALLY
CLEAR ACROSS THE KEYS THROUGH TUESDAY BEFORE REMAINING MOSTLY CLEAR
TO PARTLY CLOUDY THROUGH NEXT WEEKEND. TEMPERATURES WILL GRADUALLY BE
ON THE RISE THROUGH THE MID WEEK.

&&

.MARINE...WINDS WILL GRADUALLY DECREASE AND SHIFT TO THE NORTH-
NORTHEAST THROUGH TUESDAY AS A POST FRONTAL ENVIRONMENT GIVES WAY TO
A LIGHT AND VARIABLE HIGH PRESSURE REGIME THROUGH THE BULK OF THE
WORK WEEK. RESIDUAL SWELL FROM THE NORTHERN GULF LOW SHOULD STILL BE
VISIBLE ON THE WESTERN WATERS THROUGH TONIGHT...AND A NORTHWESTERLY
ATLANTIC SWELL SHOULD BE VISIBLE ON THE EASTERN STRAITS THROUGH
TUESDAY.

&&

.AVIATION...
CIGS WILL CONTINUE TO SCATTER THIS AFTERNOON
AS DAYTIME HEATING ACROSS THE FLORIDA PENINSULA DISTURBS THE THERMAL
ADVECTION. ANOTHER ROUND OF SLIGHTLY LOWER CIGS BASED AS LOW AS 025
WILL RETURN TO THE TERMINALS TONIGHT. MAINLY NORTHWEST TO NORTH
WINDS OF AROUND 10 KNOTS WILL BECOME NORTHEASTERLY OVERNIGHT.

&&

.CLIMATE...APRIL 20TH...ON THIS DATE IN FLORIDA KEYS HISTORY...IN
1877...THE DAILY RECORD HIGH TEMPERATURE OF 89F WAS RECORDED...A
RECORD WHICH HAS HELD FOR 137 YEARS. TEMPERATURE RECORDS IN KEY WEST
DATE BACK TO 1872.

&&

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

$$

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

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