145  
FZNT31 KNHC 120258  
OFFN20  
 
MARINE WEATHER HF VOICE BROADCAST  
NWS NATIONAL HURRICANE CENTER MIAMI, FL  
1058 PM EDT SUN APR 11 2021  
 
MARINE WEATHER HF VOICE BROADCAST FOR THE TROPICAL N ATLANTIC  
FROM 07N TO 22N BETWEEN 55W AND 64W, THE SW N ATLANTIC S OF  
31N W OF 65W INCLUDING 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 BETWEEN 55W AND 64W  
   
SYNOPSIS
 
AN ASHFALL ADVISORY IS IN EFFECT FOR LA SOUFRIERE  
VOLCANO ON THE ISLAND OF ST. VINCENT NEAR 13.3N 61.2W. MARINERS  
TRANSITING THE WATERS UNDER THE EMITTED ASH SHOULD EXERCISE  
CAUTION. FRESH SOUTHEAST WINDS WILL CONTINUE OVER THE  
NORTHWESTERN CARIBBEAN THROUGH THE PERIOD, WHILE FRESH TO STRONG  
EAST TO SOUTHEAST WINDS CONTINUE IN THE GULF OF HONDURAS. WINDS  
WILL PULSE TO STRONG SPEEDS OVER A SMALL AREA NEAR THE COAST OF  
COLOMBIA DURING THE AFTERNOONS AND AT NIGHT THROUGH THU.  
ELSEWHERE, GENERALLY MODERATE TO FRESH EAST WINDS WILL CHANGE  
LITTLE THROUGH FRI NIGHT.  
 
NW CARIBBEAN W OF 85W  
   
OVERNIGHT
 
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
MON
 
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
MON NIGHT
 
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
TUE
 
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
TUE NIGHT
 
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
WED
 
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
WED NIGHT
 
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.    
THU
 
SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.    
THU NIGHT
 
SE WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.    
FRI
 
SE WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.    
FRI NIGHT
 
SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.  
 
CARIBBEAN N OF 15N BETWEEN 72W AND 85W  
   
OVERNIGHT
 
SE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
MON
 
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
MON NIGHT
 
S OF 18N, E WINDS 10 TO 15 KT. ELSEWHERE, SE WINDS  
10 TO 15 KT. SEAS 3 TO 5 FT.   
TUE
 
E WINDS 10 TO 15 KT S OF 18N, AND E LESS THAN 10 KT  
ELSEWHERE. SEAS 3 TO 5 FT.    
TUE NIGHT
 
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
WED
 
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
WED NIGHT
 
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
THU
 
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
THU NIGHT
 
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
FRI
 
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
FRI NIGHT
 
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.  
 
CARIBBEAN FROM 11N TO 15N W OF 72W  
   
OVERNIGHT
 
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
MON
 
E WINDS 15 TO 20 KT WITHIN 90 NM OF COAST OF COLOMBIA,  
AND E 10 TO 20 KT ELSEWHERE. SEAS 5 TO 7 FT.    
MON NIGHT
 
NE WINDS 15 TO 20 KT WITHIN 90 NM OF COAST OF  
COLOMBIA, AND E 10 TO 20 KT ELSEWHERE. SEAS 4 TO 6 FT.    
TUE
 
E WINDS 10 TO 20 KT WITHIN 90 NM OF COAST OF COLOMBIA,  
AND NE 10 TO 15 KT ELSEWHERE. SEAS 4 TO 6 FT.    
TUE NIGHT
 
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
WED
 
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
WED NIGHT
 
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
THU
 
NE WINDS 10 TO 20 KT. SEAS 4 TO 5 FT.    
THU NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.    
FRI
 
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
FRI NIGHT
 
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.  
 
SW CARIBBEAN S OF 11N  
   
OVERNIGHT
 
NE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
MON
 
NE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
MON NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
TUE
 
NE WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.   
TUE NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
WED
 
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
WED NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
THU
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
THU NIGHT
 
N WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
FRI
 
W WINDS LESS THAN 10 KT IN THE MORNING, BECOMING VARIABLE  
WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.    
FRI NIGHT
 
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.  
 
CARIBBEAN BETWEEN 64W AND 72W  
   
OVERNIGHT
 
E WINDS 15 TO 20 KT GULF OF VENEZUELA, AND E 10 TO  
15 KT ELSEWHERE. SEAS 4 TO 6 FT.    
MON
 
E WINDS 10 TO 20 KT GULF OF VENEZUELA, AND E 10 TO 15 KT  
ELSEWHERE. SEAS 3 TO 5 FT GULF OF VENEZUELA, AND 4 TO 6 FT  
ELSEWHERE.    
MON NIGHT
 
NE WINDS 10 TO 20 KT GULF OF VENEZUELA, AND E 10 TO  
15 KT ELSEWHERE. SEAS 4 TO 6 FT.    
TUE
 
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
TUE NIGHT
 
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
WED
 
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
WED NIGHT
 
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.    
THU
 
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.    
THU NIGHT
 
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.    
FRI
 
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.    
FRI NIGHT
 
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.  
 
OFFSHORE LEEWARD ISLANDS AND ADJACENT ATLC WATERS FROM 15N TO  
19N W OF 55W  
   
..ASHFALL ADVISORY
 
 
A SOUFRIERE ST VINCENT VOLCANO AT POSITION 13.3N 61.2W IS  
CURRENTLY UNDERGOING FREQUENT ERUPTIONS. ASH MAY BE REACHING THE  
SURFACE OF THE OCEAN AND LOW LEVEL VISIBILITY MAY BE REDUCED.  
MARINERS TRAVELING IN THE VICINITY OF THE VOLCANO ARE URGED TO  
EXERCISE CAUTION. IF MARINERS ENCOUNTER VOLCANIC ASH OR FLOATING  
VOLCANIC DEBRIS...YOU ARE ENCOURAGED TO REPORT THE OBSERVATION TO  
THE NATIONAL HURRICANE CENTER BY CALLING 305-229-4424.  
   
OVERNIGHT
 
NE TO E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT. VOLCANIC  
ASH REDUCING VISIBILITY TO 4 NM S OF 16N.   
MON
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT. VOLCANIC ASH  
REDUCING VISIBILITY TO 4 NM S OF 16N.   
MON NIGHT
 
E TO SE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.VOLCANIC  
ASH REDUCING VISIBILITY TO 4 NM S OF 16N.   
TUE
 
SE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT. VOLCANIC ASH  
REDUCING VISIBILITY TO 4 NM S OF 16N.   
TUE NIGHT
 
E TO SE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
WED
 
E TO SE WINDS 10 KT. SEAS 3 TO 5 FT.    
WED NIGHT
 
E TO SE WINDS 10 KT. SEAS 3 TO 5 FT.    
THU
 
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
THU NIGHT
 
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
FRI
 
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
FRI NIGHT
 
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.  
 
OFFSHORE WINDWARD ISLANDS AND ADJACENT ATLC WATERS FROM 07N TO  
15N W OF 55W  
   
..ASHFALL ADVISORY
 
 
LA SOUFRIERE ST VINCENT VOLCANO AT POSITION 13.3N 61.2W IS  
CURRENTLY UNDERGOING FREQUENT ERUPTIONS. ASH MAY BE REACHING THE  
SURFACE OF THE OCEAN AND LOW LEVEL VISIBILITY MAY BE REDUCED.  
MARINERS TRAVELING IN THE VICINITY OF THE VOLCANO ARE URGED TO  
EXERCISE CAUTION. IF MARINERS ENCOUNTER VOLCANIC ASH OR FLOATING  
VOLCANIC DEBRIS...YOU ARE ENCOURAGED TO REPORT THE OBSERVATION TO  
THE NATIONAL HURRICANE CENTER BY CALLING 305-229-4424.  
   
OVERNIGHT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT. VOLCANIC ASH  
REDUCING VISIBILITY TO 4 NM, EXCEPT TO LESS THAN 4 NM W OF 58W.   
MON
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT. VOLCANIC ASH REDUCING  
VISIBILITY TO 4 NM, EXCEPT TO LESS THAN 4 NM W OF 58W.   
MON NIGHT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT. VOLCANIC ASH REDUCING  
VISIBILITY TO 4 NM, EXCEPT TO LESS THAN 4 NM W OF 58W.   
TUE
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT. VOLCANIC ASH REDUCING  
VISIBILITY TO 4 NM, EXCEPT TO LESS THAN 4 NM W OF 58W.   
TUE NIGHT
 
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
WED
 
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
WED NIGHT
 
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
THU
 
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
THU NIGHT
 
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
FRI
 
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
FRI NIGHT
 
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.  
 
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS  
   
SYNOPSIS
 
FRESH TO STRONG SOUTHWEST WINDS EAST OF FLORIDA WILL  
SHIFT EASTWARD THROUGH MON AHEAD OF A COLD FRONT THAT WILL MOVE  
OFF THE SOUTHEASTERN U.S. COAST TONIGHT. THE FRONT WILL REACH  
FROM NEAR 31N75W TO EAST-CENTRAL FLORIDA EARLY MON, FROM NEAR  
31N70W TO THE CENTRAL BAHAMAS AND TO EAST-CENTRAL CUBA MON  
EVENING AND THE SOUTHEAST WATERS BY LATE TUE. THE FRONT WILL  
MOVE EAST OF THE FORECAST WATERS ON WED AS WEAK HIGH PRESSURE  
BUILDS IN BEHIND IT. ANOTHER COLD FRONT IS EXPECTED TO CROSS THE  
NORTHWEST AND NORTH- CENTRAL WATERS ON TUE. FRESH TO STRONG  
SOUTHWEST WINDS ARE EXPECTED TO PRECEDE THIS FRONT. SCATTERED  
SHOWERS AND THUNDERSTORMS WILL CONTINUE TO MOVE OFFSHORE THE  
SOUTH FLORIDA COAST TONIGHT.  
 
ATLC WATERS FROM 27N TO 31N W OF 77W  
   
OVERNIGHT
 
SW WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
MON
 
NW WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
MON NIGHT
 
NW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
TUE
 
NW TO N WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.   
TUE NIGHT
 
NE WINDS 10 KT. SEAS 3 TO 5 FT.    
WED
 
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
WED NIGHT
 
SW WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
THU
 
W WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.    
THU NIGHT
 
NW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
FRI
 
N WINDS LESS THAN 10 KT. SEAS 5 TO 6 FT.    
FRI NIGHT
 
VARIABLE WINDS LESS THAN 10 KT. SEAS 5 TO 6 FT.  
 
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W  
   
OVERNIGHT
 
SW WINDS 10 TO 20 KT. SEAS 6 TO 7 FT.    
MON
 
W WINDS 10 TO 20 KT W OF 70W, AND SW 15 TO 25 KT  
ELSEWHERE. SEAS 6 TO 8 FT.    
MON NIGHT
 
W WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.    
TUE
 
NW WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.    
TUE NIGHT
 
NW WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
WED
 
N WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.    
WED NIGHT
 
W TO NW WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.   
THU
 
SW WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.    
THU NIGHT
 
W WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.    
FRI
 
W WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.    
FRI NIGHT
 
NW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.  
 
BAHAMAS N OF 22N  
   
OVERNIGHT
 
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.    
MON
 
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.    
MON NIGHT
 
N WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.    
TUE
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.    
TUE NIGHT
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.   
WED
 
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.    
WED NIGHT
 
SE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.   
THU
 
S WINDS LESS THAN 10 KT. SEAS 2 TO 4 FT.    
THU NIGHT
 
S WINDS LESS THAN 10 KT. SEAS 2 TO 4 FT.    
FRI
 
SW WINDS LESS THAN 10 KT. SEAS 2 TO 4 FT.    
FRI NIGHT
 
VARIABLE WINDS LESS THAN 10 KT, BECOMING E LESS  
THAN 10 KT AFTER MIDNIGHT. SEAS 3 TO 4 FT.  
 
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS  
   
OVERNIGHT
 
SE TO S WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.   
MON
 
S WINDS 10 TO 20 KT. SEAS 5 TO 6 FT.    
MON NIGHT
 
SW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
TUE
 
NW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
TUE NIGHT
 
N WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
WED
 
N WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
WED NIGHT
 
NE WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.    
THU
 
S WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.    
THU NIGHT
 
S WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.    
FRI
 
SW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
FRI NIGHT
 
SW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.  
 
ATLC WATERS S OF 22N W OF 65W  
   
OVERNIGHT
 
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.    
MON
 
SE TO S WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.   
MON NIGHT
 
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
TUE
 
W WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
TUE NIGHT
 
N WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.    
WED
 
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.   
WED NIGHT
 
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.    
THU
 
E WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.    
THU NIGHT
 
SE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.    
FRI
 
SE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.    
FRI NIGHT
 
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.  
 
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W  
   
OVERNIGHT
 
NE WINDS LESS THAN 10 KT. SEAS 7 TO 8 FT.    
MON
 
VARIABLE WINDS LESS THAN 10 KT. SEAS 6 TO 8 FT.    
MON NIGHT
 
VARIABLE WINDS LESS THAN 10 KT, BECOMING S 10 KT  
AFTER MIDNIGHT. SEAS 5 TO 7 FT.    
TUE
 
S WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.    
TUE NIGHT
 
SW WINDS LESS THAN 10 KT. SEAS 4 TO 5 FT.    
WED
 
W WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.    
WED NIGHT
 
NW WINDS LESS THAN 10 KT IN THE EVENING, BECOMING  
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
THU
 
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.    
THU NIGHT
 
SE WINDS 10 KT. SEAS 4 TO 5 FT.    
FRI
 
SE WINDS 10 KT. SEAS 4 TO 5 FT.    
FRI NIGHT
 
SE WINDS 10 KT. SEAS 4 TO 5 FT.  
 
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