Special Marine Warning 13, NWS Key West, FL

767 
FZUS72 KKEY 152232
MWSKEY

MARINE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KEY WEST FL
532 PM EST WED FEB 15 2017

GMZ033>035-044-152300-
/O.CON.KKEY.MA.W.0013.000000T0000Z-170215T2300Z/
532 PM EST WED FEB 15 2017

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 600 PM EST...

FOR THE FOLLOWING AREAS...
GULF OF MEXICO FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL
OUT TO 5 FATHOMS...
GULF OF MEXICO INCLUDING DRY TORTUGAS AND REBECCA SHOAL CHANNEL...
GULF WATERS FROM EAST CAPE SABLE TO CHOKOLOSKEE 20 TO 60 NM OUT AND
BEYOND 5 FATHOMS...
HAWK CHANNEL FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT
TO THE REEF...

AT 531 PM EST...A SEVERE THUNDERSTORM WITH POSSIBLE WATERSPOUTS WAS 
LOCATED OVER DRY TORTUGAS LIGHT...OR NEAR DRY TORTUGAS... MOVING 
EAST AT 30 KNOTS.

HAZARD...WATERSPOUTS AND WIND GUSTS 34 KNOTS OR GREATER. 

SOURCE...NATIONAL WEATHER SERVICE METEOROLOGIST. 

IMPACT...WATERSPOUTS CAN QUICKLY FORM AND CAPSIZE BOATS...CAUSE 
         CONSIDERABLE DAMAGE TO VESSELS AND CREATE SUDDENLY HIGHER 
         WAVES. EXPECT WIND GUSTS IN EXCESS OF 34 KNOTS...SUDDENLY 
         HIGHER WAVES...FREQUENT LIGHTNING...AND HEAVY DOWNPOURS. 

THE SEVERE THUNDERSTORM WILL BE NEAR...
  DRY TORTUGAS AROUND 540 PM EST. 
  PULASKI SHOAL LIGHT AROUND 550 PM EST. 
  REBECCA SHOAL LIGHT AROUND 600 PM EST. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE FOR WIND GUSTS IN EXCESS OF 35 KNOTS...STEEP AND FAST-
BUILDING SEAS...AND BLINDING DOWNPOURS. MAKE SURE ALL ON BOARD ARE 
WEARING LIFE JACKETS.

&&

LAT...LON 2452 8320 2470 8322 2480 8249 2453 8247
TIME...MOT...LOC 2231Z 265DEG 29KT 2464 8292 

WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...>34KTS

$$

MCLOVIN

Area Forecast Discussion
National Weather Service Key West FL
112 PM EST Wed Feb 15 2017

.DISCUSSION...
.CURRENTLY...
KBYX detects no precipitation echoes in the forecast area. Skies
over the island chain are partly cloudy. Winds over land are south
to southwest near 15 mph. C-MAN winds, on average, are south to
southwest at 15 to 20 knots. Temperatures are in the lower to mid
80s.

.SHORT TERM (Tonight through Friday night)...
A weak cold front will pass through the Florida Keys late tonight.
An area of high pressure will progress eastward through the
northern Gulf of Mexico Thursday and Thursday night. This area of
high pressure will enter the southwest Atlantic Ocean Friday. An
Atlantic ridge of high pressure will extend across north central
Florida Friday night. Rain chances in the short term portion of
the forecast will be highest tonight ahead of the aforementioned
feeble cold front.

&&

.LONG TERM (Saturday through Wednesday)...
An Atlantic ridge of high pressure over north central Florida will
retreat eastward Saturday. A trough of low pressure will progress
southward down the Florida peninsula Saturday night. This trough
of low pressure should pass through the Florida Keys Sunday or
Sunday night. An area of high pressure over the southeastern
United States will build southward down the Florida peninsula
early next week. Rain chances in the long term portion of the
forecast should be highest Saturday night well ahead of the trough
of low pressure.

&&

.MARINE...
A small craft advisory will be in effect for the eastern portion
of the Florida Straits tonight due to sustained southwest surface
winds near 20 knots, shifting to northwest to north after
midnight. No advisories expected Thursday through at least Monday
night.

&&

.AVIATION...
VFR conditions will persist through at least 16/06z at both the
Key West and Marathon International terminals. Winds currently out
of the south to southwest will shift around the compass to
northwest through 16/06z, and include gusts overnight as a weak
front nears the Keys area. The front will likely dissipate in the
vicinity of the Florida Keys, but will keep a period of vicinity
showers in the terminal forecasts between 16/06z and 16/14z.

&&

.CLIMATE...
On this date in Florida Keys weather history, in 1936, 1.47 inches
of rain fell in Key West. This set the daily record for maximum
rainfall measured in Key West on February 15th, a record which
still stands 81 years later. Rainfall records at Key West date
back to 1871.

&&

.PRELIMINARY POINT TEMPS/POPS...
Key West  71 77 63 75 / 40 10 - 0
Marathon  71 78 63 74 / 40 10 - 0

&&

.KEY WATCHES/WARNINGS/ADVISORIES...
FL...None.
GM...Small Craft Advisory will be in effect for GMZ052-072.

&&

Public/Marine/Fire...BS
Aviation/Nowcasts....BWC
Data Collection......Chesser

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Hazardous Weather Outlook...UPDATED
National Weather Service Key West FL
131 PM EST Wed Feb 15 2017

FLZ076>078-GMZ031>035-042>044-052>055-072>075-161100-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
Bayside and Gulf side from Craig Key to west end of Seven Mile
Bridge-
Gulf waters from East Cape Sable to Chokoloskee 20 to 60 NM out
and beyond 5 fathoms-
Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel-
Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
Straits of Florida from Ocean Reef to Craig Key out 20 NM-
Straits of Florida from Craig Key to west end of Seven Mile
Bridge out 20 NM-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal out 20 NM-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas out 20 NM-
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out-
Straits of Florida from Craig Key to west end of Seven Mile
Bridge 20 to 60 NM out-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal 20 to 60 NM out-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas 20 to 60 NM out-
131 PM EST Wed Feb 15 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE FLORIDA KEYS AND ADJACENT
COASTAL WATERS.

.DAY ONE...TONIGHT

A small craft advisory will be in effect for the eastern portion
of the Florida Straits due to sustained southwest surface winds
near 20 knots, shifting to west to northwest after midnight.

Isolated thunderstorms will impact the coastal waters of the
Florida Straits. The primary thunderstorm hazard will be cloud to
water lightning strikes.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

No hazardous weather is expected at this time for Thursday through
Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

BS