247  
FZNT31 KNHC 182049  
OFFN20  
 
MARINE WEATHER HF VOICE BROADCAST  
NWS NATIONAL HURRICANE CENTER MIAMI, FL  
349 PM EST WED DEC 18 2024  
 
MARINE WEATHER HF VOICE BROADCAST FOR THE TROPICAL N ATLANTIC  
FROM 07N TO 19N W OF 55W, THE N ATLANTIC FROM 19N TO  
31N W OF 55W INCLUDING THE BAHAMAS, AND THE CARIBBEAN SEA.  
 
SEAS 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.  
 
SYNOPSIS FOR CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM  
07N TO 19N W OF 55W  
   
SYNOPSIS
 
A TIGHT PRESSURE GRADIENT BETWEEN 1034 MB HIGH  
PRESSURE NE OF BERMUDA AND LOW PRESSURE OVER COLOMBIA WILL  
SUPPORT MODERATE TO FRESH TRADE WINDS OVER THE EASTERN AND  
CENTRAL CARIBBEAN E OF 80W THROUGH FRI MORNING. WINDS WILL PULSE  
TO STRONG SPEEDS EACH NIGHT OFF THE COAST OF COLOMBIA AND  
VENEZUELA. FRESH TO STRONG NE WINDS ARE ALSO EXPECTED JUST SOUTH  
OF HISPANIOLA AND THROUGH THE ATLANTIC PASSAGES. ATLANTIC NE  
SWELL WILL PRODUCE ROUGH SEAS THROUGH THE ATLANTIC PASSAGES  
THROUGH FRI EVENING BEFORE DIMINISHING. ELSEWHERE, GENTLE TO  
MODERATE NE WINDS ARE EXPECTED ACROSS THE NORTHWESTERN CARIBBEAN  
THROUGH FRI. LOOKING AHEAD, HIGH PRESSURE BUILDING OVER THE GULF  
OF MEXICO OVER THE WEEKEND WILL LEAD TO GENERALLY MODERATE TO  
LOCALLY FRESH E TO NE WINDS ACROSS THE BASIN THROUGH THE  
WEEKEND.  
 
NW CARIBBEAN W OF 85W  
   
TONIGHT
 
NE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.   
THU
 
N WINDS LESS THAN 10 KT. SEAS 3 FT.    
THU NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.    
FRI
 
N WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
FRI NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
SAT
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
SAT NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.    
SUN
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.    
SUN NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
MON
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.    
MON NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.  
 
CARIBBEAN N OF 15N BETWEEN 72W AND 85W  
   
TONIGHT
 
NE WINDS 10 TO 20 KT S OF 18N, AND NE LESS THAN 10 KT  
ELSEWHERE. SEAS 4 TO 6 FT.    
THU
 
NE WINDS 10 TO 20 KT S OF 18N, AND NE LESS THAN 10 KT  
ELSEWHERE. SEAS 4 TO 6 FT.    
THU NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
FRI
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
FRI NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
SAT
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
SAT NIGHT
 
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
SUN
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
SUN NIGHT
 
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
MON
 
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
MON NIGHT
 
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.  
 
CARIBBEAN FROM 11N TO 15N W OF 72W  
   
TONIGHT
 
E WINDS 20 TO 25 KT WITHIN 90 NM OF COAST OF  
COLOMBIA, AND NE 10 TO 20 KT ELSEWHERE. SEAS 6 TO 8 FT.    
THU
 
E WINDS 15 TO 25 KT WITHIN 90 NM OF COAST OF COLOMBIA,  
AND NE 10 TO 20 KT ELSEWHERE. SEAS 6 TO 8 FT.    
THU NIGHT
 
E WINDS 15 TO 25 KT WITHIN 90 NM OF COAST OF  
COLOMBIA, AND NE 10 TO 20 KT ELSEWHERE. SEAS 6 TO 7 FT.    
FRI
 
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
FRI NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.    
SAT
 
NE WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.    
SAT NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.    
SUN
 
NE WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.    
SUN NIGHT
 
NE WINDS 10 TO 20 KT. SEAS 5 TO 6 FT.    
MON
 
NE WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.    
MON NIGHT
 
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.  
 
SW CARIBBEAN S OF 11N  
   
TONIGHT
 
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
THU
 
N WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.    
THU NIGHT
 
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
FRI
 
N WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
FRI NIGHT
 
N WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
SAT
 
N WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.    
SAT NIGHT
 
N WINDS LESS THAN 10 KT. SEAS 4 TO 5 FT.    
SUN
 
N WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
SUN NIGHT
 
N WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
MON
 
N WINDS LESS THAN 10 KT. SEAS 4 TO 5 FT.    
MON NIGHT
 
N WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.  
 
CARIBBEAN BETWEEN 64W AND 72W  
   
TONIGHT
 
E WINDS 20 TO 25 KT GULF OF VENEZUELA, AND E 10 TO  
20 KT ELSEWHERE. SEAS 5 TO 7 FT.    
THU
 
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT GULF OF VENEZUELA,  
AND 6 TO 8 FT ELSEWHERE.    
THU NIGHT
 
E WINDS 15 TO 25 KT GULF OF VENEZUELA, AND E 10 TO  
20 KT ELSEWHERE. SEAS 3 TO 5 FT GULF OF VENEZUELA, AND 6 TO 8 FT  
ELSEWHERE.    
FRI
 
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT GULF OF VENEZUELA,  
AND 5 TO 7 FT ELSEWHERE.    
FRI NIGHT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
SAT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.    
SAT NIGHT
 
E WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.    
SUN
 
E WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.    
SUN NIGHT
 
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
MON
 
E WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.    
MON NIGHT
 
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.  
 
OFFSHORE LEEWARD ISLANDS AND ADJACENT ATLC WATERS FROM 15N TO  
19N W OF 55W  
   
TONIGHT
 
E WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.    
THU
 
E WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.    
THU NIGHT
 
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.    
FRI
 
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.    
FRI NIGHT
 
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.    
SAT
 
E WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
SAT NIGHT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
SUN
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
SUN NIGHT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
MON
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
MON NIGHT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.  
 
OFFSHORE WINDWARD ISLANDS AND ADJACENT ATLC WATERS FROM 07N TO  
15N W OF 55W  
   
TONIGHT
 
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.    
THU
 
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.    
THU NIGHT
 
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.    
FRI
 
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.    
FRI NIGHT
 
E WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
SAT
 
E WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
SAT NIGHT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
SUN
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
SUN NIGHT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
MON
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
MON NIGHT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.  
 
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS  
   
SYNOPSIS
 
STRONG HIGH PRESSURE ACROSS THE CENTRAL ATLANTIC NE  
OF BERMUDA EXTENDS A RIDGE SW TO THE N FLORIDA AND GEORGIA  
COASTS. THE PRESSURE GRADIENT SOUTH OF THE RIDGE WILL CONTINUE  
TO SUPPORT FRESH E WINDS ACROSS THE WATERS BETWEEN 25N AND THE  
GREATER ANTILLES TONIGHT, WITH STRONG WINDS EXPECTED THROUGH THE  
SOUTHEASTERN BAHAMAS. FARTHER EAST, A COLD FRONT ANALYZED FROM  
24N50W TO 24N63W WILL DRIFT SOUTHWARD THROUGH THU, PRODUCING  
WIDESPREAD FRESH TO STRONG E WINDS FROM 28N SOUTHWARD TO 18N.  
STRONGEST WINDS AND SEAS TO 12 FT ALONG THE FRONT WILL SHIFT  
SOUTHWEST TO JUST NORTH OF THE NE CARIBBEAN. ROUGH SEAS IN NE  
SWELL WILL PREVAIL NORTH OF 15N THROUGH THE END OF THE WORK WEEK  
BEFORE SEAS BEGIN TO SLOWLY SUBSIDE FROM NORTH TO SOUTH LATE THU  
THROUGH EARLY SAT. ELSEWHERE, FRESH TRADE WINDS AND ROUGH SEAS  
WILL PREVAIL SOUTH OF 15N THROUGH THU BEFORE WINDS DIMINISH TO  
MODERATE SPEEDS ON FRI. A COLD FRONT WILL MOVE OFF THE COAST OF  
THE SOUTHEASTERN UNITED STATES LATE THU AND STALL, THEN ENTER  
THE NW ZONES OFF OF FLORIDA FRI, AND REACH FROM 31N73W TO  
WESTERN CUBA BY SAT MORNING. FRESH TO STRONG N TO NW WINDS WILL  
OCCUR BEHIND THE FRONT.  
 
ATLC WATERS FROM 27N TO 31N W OF 77W  
   
TONIGHT
 
S WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.    
THU
 
NW WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.    
THU NIGHT
 
N WINDS 10 KT. SEAS 5 TO 6 FT.    
FRI
 
NW WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
FRI NIGHT
 
NW WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.    
SAT
 
N WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.    
SAT NIGHT
 
N WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
SUN
 
NE WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
SUN NIGHT
 
NE WINDS 15 TO 20 KT. SEAS 6 TO 9 FT.    
MON
 
NE WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.    
MON NIGHT
 
E WINDS 10 TO 20 KT. SEAS 7 TO 9 FT.  
 
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W  
   
TONIGHT
 
SE WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.    
THU
 
S WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.    
THU NIGHT
 
S WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
FRI
 
SW WINDS 10 TO 15 KT. SEAS 6 TO 7 FT.    
FRI NIGHT
 
W WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.    
SAT
 
NW WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.    
SAT NIGHT
 
N WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
SUN
 
N WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.    
SUN NIGHT
 
N WINDS 10 TO 20 KT. SEAS 7 TO 9 FT.    
MON
 
NE WINDS 15 TO 20 KT. SEAS 8 TO 9 FT.    
MON NIGHT
 
NE WINDS 10 TO 20 KT. SEAS 7 TO 9 FT.  
 
BAHAMAS N OF 22N  
   
TONIGHT
 
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
THU
 
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
THU NIGHT
 
NE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
FRI
 
N WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
FRI NIGHT
 
N WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT  
AFTER MIDNIGHT. SEAS 3 TO 5 FT.    
SAT
 
N WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN  
THE AFTERNOON. SEAS 3 TO 5 FT.    
SAT NIGHT
 
NE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.    
SUN
 
NE WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT IN  
THE AFTERNOON. SEAS 3 TO 5 FT.    
SUN NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
MON
 
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
MON NIGHT
 
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.  
 
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS  
   
TONIGHT
 
E WINDS 10 TO 20 KT. SEAS 8 TO 12 FT.    
THU
 
SE WINDS 10 TO 20 KT W OF 70W, AND SE 15 TO 20 KT  
ELSEWHERE. SEAS 7 TO 10 FT W OF 70W, AND 9 TO 12 FT ELSEWHERE.    
THU NIGHT
 
SE WINDS 10 TO 15 KT W OF 70W, AND SE 15 TO 20 KT  
ELSEWHERE. SEAS 7 TO 10 FT.    
FRI
 
SE WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.    
FRI NIGHT
 
S WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
SAT
 
W WINDS 10 TO 15 KT, SHIFTING TO NW IN THE AFTERNOON.  
SEAS 6 TO 7 FT.    
SAT NIGHT
 
N WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.    
SUN
 
N WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT IN THE  
AFTERNOON. SEAS 5 TO 7 FT.    
SUN NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
MON
 
NE WINDS 15 TO 20 KT. SEAS 7 TO 9 FT.    
MON NIGHT
 
NE WINDS 15 TO 20 KT. SEAS 8 TO 10 FT.  
 
ATLC WATERS S OF 22N W OF 65W  
   
TONIGHT
 
E WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.    
THU
 
E WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.    
THU NIGHT
 
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.    
FRI
 
SE WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
FRI NIGHT
 
SE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.    
SAT
 
S WINDS LESS THAN 10 KT, SHIFTING TO N IN THE AFTERNOON.  
SEAS 4 TO 6 FT.    
SAT NIGHT
 
NE WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.    
SUN
 
NE WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT IN  
THE AFTERNOON. SEAS 3 TO 5 FT.    
SUN NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
MON
 
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
MON NIGHT
 
NE WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.  
 
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W  
   
TONIGHT
 
E WINDS 20 TO 25 KT. SEAS 10 TO 12 FT.    
THU
 
E WINDS 15 TO 25 KT. SEAS 10 TO 12 FT.    
THU NIGHT
 
E WINDS 15 TO 20 KT. SEAS 9 TO 11 FT.    
FRI
 
E WINDS 15 TO 20 KT. SEAS 8 TO 10 FT.    
FRI NIGHT
 
E WINDS 15 TO 20 KT. SEAS 8 TO 9 FT.    
SAT
 
SE WINDS 10 TO 15 KT. SEAS 7 TO 8 FT.    
SAT NIGHT
 
E WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
SUN
 
SE WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
SUN NIGHT
 
E WINDS 10 KT. SEAS 5 TO 7 FT.    
MON
 
E WINDS 10 KT. SEAS 5 TO 6 FT.    
MON NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.  
 
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