020  
FZUS52 KKEY 181431  
CWFKEY  
 
COASTAL WATERS FORECAST FOR THE FLORIDA KEYS  
NATIONAL WEATHER SERVICE KEY WEST FL  
1031 AM EDT FRI AUG 18 2017  
 
FLORIDA BAY...HAWK CHANNEL AND STRAITS OF FLORIDA FROM OCEAN REEF TO  
SOUTH OF DRY TORTUGAS...AND THE EXTREME SOUTHEASTERN GULF OF  
MEXICO...INCLUDING THE FLORIDA KEYS NATIONAL MARINE SANCTUARY  
 
SEAS ARE GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE  
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE  
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.  
 
GMZ005-182030-  
SYNOPSIS FOR KEYS COASTAL WATERS FROM OCEAN REEF TO DRY TORTUGAS  
1031 AM EDT FRI AUG 18 2017  
   
SYNOPSIS
 
HIGH PRESSURE WILL EXTEND ACROSS CENTRAL FLORIDA  
THROUGH TONIGHT. THIS HIGH WILL RETREAT EASTWARDS WHILE AN AREA  
OF LOW PRESSURE MOVES WESTWARD THROUGH THE CARIBBEAN SEA THIS  
WEEKEND, RESULTING IN FRESHENING BREEZES EARLY NEXT WEEK.  
 
THE APPROXIMATE SHOREWARD EDGE OF THE GULF STREAM CURRENT, AS OF  
AUGUST 17TH, 2017,  
 
22 NM SOUTH OF DRY TORTUGAS LIGHT...ON LOGGERHEAD KEY.  
12 NM SOUTH OF COSGROVE SHOAL LIGHT...OFF THE MARQUESAS KEYS.  
11 NM SOUTH OF SAND KEY LIGHT...OFF KEY WEST.  
15 NM SOUTH OF LOOE KEY...OFF BIG PINE KEY.  
15 NM SOUTH OF SOMBRERO KEY LIGHT...OFF MARATHON.  
11 NM SOUTHEAST OF ALLIGATOR REEF LIGHT...OFF ISLAMORADA.  
9 NM SOUTHEAST OF MOLASSES REEF LIGHT...OFF KEY LARGO.  
6 NM EAST OF CARYSFORT REEF LIGHT...OFF OCEAN REEF.  
 
GULF STREAM INFORMATION COURTESY OF THE NAVAL OCEANOGRAPHIC OFFICE.  
 

 
 
GMZ031-182030-  
FLORIDA BAY INCLUDING BARNES SOUND, BLACKWATER SOUND, AND  
BUTTONWOOD SOUND-  
1031 AM EDT FRI AUG 18 2017  
   
THIS AFTERNOON
 
EAST WINDS NEAR 10 KNOTS. BAY WATERS A LIGHT  
CHOP. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.    
TONIGHT
 
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS. BAY WATERS A  
LIGHT TO MODERATE CHOP. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS.   
SATURDAY
 
NORTHEAST TO EAST WINDS NEAR 10 KNOTS. BAY WATERS A  
LIGHT CHOP. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.    
SATURDAY NIGHT
 
NORTHEAST TO EAST WINDS NEAR 10 KNOTS, BECOMING  
SOUTHEAST AND INCREASING TO 10 TO 15 KNOTS AFTER MIDNIGHT. BAY  
WATERS A LIGHT TO MODERATE CHOP. NUMEROUS SHOWERS AND SCATTERED  
THUNDERSTORMS.   
SUNDAY
 
SOUTHEAST WINDS NEAR 15 KNOTS. BAY WATERS A MODERATE  
CHOP. SCATTERED SHOWERS AND THUNDERSTORMS.    
SUNDAY NIGHT AND MONDAY
 
EAST TO SOUTHEAST WINDS 15 TO 20 KNOTS.  
BAY WATERS CHOPPY. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
MONDAY NIGHT
 
EAST TO SOUTHEAST WINDS NEAR 15 KNOTS. BAY WATERS  
A MODERATE CHOP. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
TUESDAY
 
EAST TO SOUTHEAST WINDS 10 TO 15 KNOTS. BAY WATERS A  
LIGHT TO MODERATE CHOP. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS.    
TUESDAY NIGHT
 
SOUTHEAST WINDS NEAR 10 KNOTS. BAY WATERS A LIGHT  
CHOP. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.  
 

 
 
GMZ032-035-182030-  
BAYSIDE AND GULF SIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE  
BRIDGE-  
GULF OF MEXICO FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON  
SHOAL OUT TO 5 FATHOMS-  
1031 AM EDT FRI AUG 18 2017  
   
THIS AFTERNOON
 
EAST WINDS NEAR 10 KNOTS. SEAS 1 FOOT OR LESS.  
NEARSHORE WATERS A LIGHT CHOP. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS.   
TONIGHT AND SATURDAY
 
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS.  
SEAS AROUND 1 FOOT. NEARSHORE WATERS A LIGHT TO MODERATE CHOP.  
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
SATURDAY NIGHT
 
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS, BECOMING  
SOUTHEAST AFTER MIDNIGHT. SEAS AROUND 1 FOOT. NEARSHORE WATERS A  
LIGHT TO MODERATE CHOP. NUMEROUS SHOWERS AND SCATTERED  
THUNDERSTORMS.    
SUNDAY
 
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 1 TO 2 FEET.  
NEARSHORE WATERS A MODERATE CHOP. SCATTERED SHOWERS AND  
THUNDERSTORMS.    
SUNDAY NIGHT AND MONDAY
 
EAST TO SOUTHEAST WINDS 15 TO 20 KNOTS.  
SEAS AROUND 2 FEET. NEARSHORE WATERS CHOPPY. SCATTERED SHOWERS AND  
ISOLATED THUNDERSTORMS.   
MONDAY NIGHT
 
EAST TO SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 1 TO 2  
FEET. NEARSHORE WATERS A MODERATE CHOP. SCATTERED SHOWERS AND  
ISOLATED THUNDERSTORMS.   
TUESDAY
 
EAST TO SOUTHEAST WINDS 10 TO 15 KNOTS. SEAS AROUND 1  
FOOT. NEARSHORE WATERS A LIGHT TO MODERATE CHOP. SCATTERED SHOWERS  
AND ISOLATED THUNDERSTORMS.    
TUESDAY NIGHT
 
SOUTHEAST WINDS 10 TO 15 KNOTS. SEAS AROUND 1  
FOOT. NEARSHORE WATERS A LIGHT TO MODERATE CHOP. SCATTERED SHOWERS  
AND ISOLATED THUNDERSTORMS.  
 

 
 
GMZ042>044-182030-  
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-  
1031 AM EDT FRI AUG 18 2017  
   
THIS AFTERNOON
 
EAST WINDS NEAR 10 KNOTS. SEAS 1 TO 2 FEET.  
NEARSHORE WATERS A LIGHT CHOP. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS.   
TONIGHT AND SATURDAY
 
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS.  
SEAS AROUND 2 FEET. NEARSHORE WATERS A LIGHT TO MODERATE CHOP.  
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
SATURDAY NIGHT
 
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS, BECOMING  
SOUTHEAST AFTER MIDNIGHT. SEAS AROUND 2 FEET. NEARSHORE WATERS A  
LIGHT TO MODERATE CHOP. NUMEROUS SHOWERS AND SCATTERED  
THUNDERSTORMS.    
SUNDAY
 
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 3 FEET.  
NEARSHORE WATERS A MODERATE CHOP. SCATTERED SHOWERS AND  
THUNDERSTORMS.    
SUNDAY NIGHT THROUGH MONDAY NIGHT
 
EAST TO SOUTHEAST WINDS 15 TO  
20 KNOTS. SEAS 2 TO 4 FEET. NEARSHORE WATERS CHOPPY. SCATTERED  
SHOWERS AND ISOLATED THUNDERSTORMS.   
TUESDAY
 
EAST TO SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 3  
FEET. NEARSHORE WATERS A MODERATE CHOP. SCATTERED SHOWERS AND  
ISOLATED THUNDERSTORMS.    
TUESDAY NIGHT
 
SOUTHEAST WINDS 10 TO 15 KNOTS. SEAS AROUND 2  
FEET. NEARSHORE WATERS A LIGHT TO MODERATE CHOP. SCATTERED SHOWERS  
AND ISOLATED THUNDERSTORMS.  
 

 
 
GMZ052>055-072>075-182030-  
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-  
1031 AM EDT FRI AUG 18 2017  
   
THIS AFTERNOON
 
EAST WINDS 10 TO 15 KNOTS. SEAS 2 TO 4 FEET.  
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
TONIGHT AND SATURDAY
 
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS.  
SEAS 2 TO 4 FEET. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
SATURDAY NIGHT
 
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS, BECOMING  
SOUTHEAST AND INCREASING TO NEAR 15 KNOTS AFTER MIDNIGHT. SEAS 2  
TO 4 FEET, BUILDING TO 3 TO 5 FEET. NUMEROUS SHOWERS AND SCATTERED  
THUNDERSTORMS.    
SUNDAY
 
SOUTHEAST WINDS 15 TO 20 KNOTS. SEAS 4 TO 6 FEET.  
SCATTERED SHOWERS AND THUNDERSTORMS.   
SUNDAY NIGHT AND MONDAY
 
EAST TO SOUTHEAST WINDS NEAR 20 KNOTS.  
SEAS 5 TO 7 FEET. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.    
MONDAY NIGHT
 
EAST TO SOUTHEAST WINDS 15 TO 20 KNOTS. SEAS 4 TO  
6 FEET. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
TUESDAY
 
EAST TO SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 3 TO 5  
FEET. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
TUESDAY NIGHT
 
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 3 TO 5 FEET.  
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.  
 

 
 
GMZ033-034-182030-  
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-  
1031 AM EDT FRI AUG 18 2017  
   
THIS AFTERNOON
 
NORTHEAST TO EAST WINDS AROUND 10 KNOTS. SEAS 1  
TO 2 FEET. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
TONIGHT AND SATURDAY
 
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS.  
SEAS 2 TO 3 FEET. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
SATURDAY NIGHT
 
NORTHEAST TO EAST WINDS 10 TO 15 KNOTS, BECOMING  
SOUTHEAST AFTER MIDNIGHT. SEAS 2 TO 3 FEET. NUMEROUS SHOWERS AND  
SCATTERED THUNDERSTORMS.    
SUNDAY
 
SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 4 FEET.  
SCATTERED SHOWERS AND THUNDERSTORMS.   
SUNDAY NIGHT THROUGH MONDAY NIGHT
 
EAST TO SOUTHEAST WINDS 15 TO  
20 KNOTS. SEAS 3 TO 5 FEET. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS.   
TUESDAY
 
EAST TO SOUTHEAST WINDS NEAR 15 KNOTS. SEAS 2 TO 4  
FEET. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.   
TUESDAY NIGHT
 
SOUTHEAST WINDS 10 TO 15 KNOTS. SEAS 2 TO 3 FEET.  
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS.  
 

 
 
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