846
FZNT31 KNHC 181507
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
1107 AM EDT TUE MAR 18 2025
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
FRESH NE WINDS AND ROUGH SEAS FOLLOWING THE TAIL OF
A COLD FRONT THAT EXTENDS FROM THE WINDWARD PASSAGE TO THE
OFFSHORE WATERS OF NICARAGUA WILL DIMINISH TO MODERATE SPEEDS
LATE IN THE AFTERNOON AS THE FRONTAL BOUNDARY CONTINUES TO
WEAKEN BEFORE DISSIPATING TONIGHT INTO EARLY WED. HOWEVER,
BUILDING HIGH PRESSURE IN THE WAKE OF THE FRONT N OF THE AREA
WILL LEAD TO THE DEVELOPMENT OF PULSING FRESH TO STRONG NE WINDS
IN THE LEE OF CUBA AND THE WINDWARD PASSAGE FROM THIS EVENING
THROUGH WED EVENING. IN THE SOUTH-CENTRAL AND PORTIONS OF THE SW
CARIBBEAN, FRESH TO STRONG NE TO E WINDS WILL PREVAIL THROUGH
THE WEEKEND, INCREASING IN AREAL COVERAGE FRI. OTHERWISE, HIGH
PRESSURE WILL BUILD NEAR THE BAHAMAS OVER THE WEEKEND AND TRADE
WINDS WILL INCREASE ACROSS THE REGION, WITH NEAR GALE-FORCE
WINDS DEVELOPING OFFSHORE COLOMBIA SAT NIGHT ALONG WITH ROUGH
SEAS. LOOKING AHEAD, THE TAIL OF A COLD FRONT WILL ENTER THE NW
CARIBBEAN EARLY FRI AND DISSIPATE FRI EVENING.
NW CARIBBEAN W OF 85W
THIS AFTERNOON
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
WED
E WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.
WED NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.
THU
NE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
THU NIGHT
NE WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 3 TO 4 FT.
FRI
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
FRI NIGHT
E WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 4 TO 6 FT.
SAT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
THIS AFTERNOON
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
NE 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 15 KT. SEAS 3 TO 5 FT.
THU
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
THU NIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI NIGHT
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SAT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
CARIBBEAN FROM 11N TO 15N W OF 72W
THIS AFTERNOON
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
WED
NE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
WED NIGHT
NE WINDS 15 TO 25 KT WITHIN 90 NM OF COAST OF
COLOMBIA, AND NE 10 TO 20 KT ELSEWHERE. SEAS 4 TO 6 FT.
THU
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
THU NIGHT
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
FRI
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
FRI NIGHT
NE WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
SAT
NE WINDS 15 TO 25 KT. SEAS 7 TO 10 FT.
SAT NIGHT
NE WINDS 15 TO 25 KT. SEAS 8 TO 11 FT.
SW CARIBBEAN S OF 11N
THIS AFTERNOON
N WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TONIGHT
N 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 5 TO 7 FT.
THU NIGHT
N WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
FRI
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
FRI NIGHT
NE WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
SAT
NE WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
SAT NIGHT
NE WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
CARIBBEAN BETWEEN 64W AND 72W
THIS AFTERNOON
NE WINDS 10 TO 15 KT GULF OF VENEZUELA, AND E
LESS THAN 10 KT ELSEWHERE. SEAS 3 TO 4 FT.
TONIGHT
NE WINDS 10 TO 20 KT GULF OF VENEZUELA, AND NE LESS
THAN 10 KT ELSEWHERE. SEAS 3 TO 4 FT.
WED
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
WED NIGHT
NE WINDS 10 TO 15 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 4 TO 6 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
FRI NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
SAT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
SAT NIGHT
E WINDS 15 TO 25 KT. SEAS 6 TO 8 FT.
OFFSHORE LEEWARD ISLANDS AND ADJACENT ATLC WATERS FROM 15N TO
19N W OF 55W
THIS AFTERNOON
S WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
TONIGHT
S WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
WED
S WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
WED NIGHT
S WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
THU
SE WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
THU NIGHT
E WINDS LESS THAN 10 KT. SEAS 6 TO 8 FT.
FRI
SE WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SAT
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
OFFSHORE WINDWARD ISLANDS AND ADJACENT ATLC WATERS FROM 07N TO
15N W OF 55W
THIS AFTERNOON
SE WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
TONIGHT
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 5 TO 7 FT.
FRI NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
SAT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS
SYNOPSIS
FRESH TO STRONG WINDS AND ROUGH SEAS IN THE E
SEMICIRCLE OF A NON-TROPICAL LOW OF 1008 MB NEAR 25N58W WILL
CONTINUE AFFECT THE OFFSHORE WATERS N OF 21N AND E OF 62W
THROUGH THIS EVENING AS THE LOW OPEN OPENS INTO A TROUGH AND
MOVES N OF THE AREA. STRONG TO NEAR GALE-FORCE WINDS WILL PRECEDE
AND CONTINUE TO FOLLOW A COLD FRONT THAT EXTENDS FROM 31N67W TO
THE TURKS AND CAICOS INTO THE WINDWARD PASSAGE. THE FRONT WILL
REACH FROM NEAR BERMUDA TO N HISPANIOLA THIS AFTERNOON, AND FROM
31N60W TO PUERTO RICO WED MORNING. A LOW PRESSURE SYSTEM IS
FORECAST TO DEVELOP ALONG THIS FRONT TONIGHT INTO WED, WHICH WILL
SUPPORT THE DEVELOPMENT OF GALE-FORCE WINDS AND VERY ROUGH SEAS
BETWEEN BERMUDA AND THE BAHAMAS TONIGHT THROUGH WED AFTERNOON.
AFTERWARD, WINDS AND SEAS WILL GRADUALLY DIMINISH ACROSS THE
REGION THROUGH THU NIGHT. LOOKING AHEAD, FRESH TO STRONG
SOUTHERLY WINDS WILL DEVELOP OVER THE NE FLORIDA OFFSHORE WATERS
ON THU AHEAD OF A STRONG COLD FRONT FORECAST TO ENTER THE NW
OFFSHORE WATERS LATE THU INTO THU EVENING. NEAR GALE-FORCE NW
WINDS WILL FOLLOW THIS FRONT, WHICH IS FORECAST TO REACH FROM
BERMUDA TO THE CENTRAL BAHAMAS LATE FRI. THE FRONT WILL MOVE E OF
THE AREA ON SAT.
ATLC WATERS FROM 27N TO 31N W OF 77W
THIS AFTERNOON
N WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
TONIGHT
N WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
WED
N WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 6 TO 8 FT.
WED NIGHT
W WINDS LESS THAN 10 KT. SEAS 6 TO 9 FT.
THU
SW WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
THU NIGHT
W WINDS 20 TO 30 KT. SEAS 7 TO 10 FT.
FRI
NW WINDS 20 TO 25 KT, SHIFTING TO N 10 TO 20 KT IN THE
AFTERNOON. SEAS 8 TO 12 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT, SHIFTING TO SE AFTER
MIDNIGHT. SEAS 6 TO 9 FT.
SAT
S WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
SAT NIGHT
SW WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN
10 KT AFTER MIDNIGHT. SEAS 3 TO 5 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
..GALE WARNING
THIS AFTERNOON
NW WINDS 20 TO 25 KT W OF 70W, AND W 10 TO
20 KT ELSEWHERE. SEAS 9 TO 14 FT W OF 70W, AND 8 TO 9 FT
ELSEWHERE.
TONIGHT
NW WINDS 20 TO 35 KT. W OF 70W, SEAS 12 TO 17 FT.
ELSEWHERE, SEAS 9 TO 13 FT, BUILDING TO 11 TO 16 FT AFTER
MIDNIGHT.
WED
NW WINDS 25 TO 35 KT W OF 70W, AND NW 20 TO 30 KT
ELSEWHERE. SEAS 14 TO 19 FT.
WED NIGHT
N WINDS 20 TO 30 KT W OF 70W, AND NW 15 TO 25 KT
ELSEWHERE. SEAS 12 TO 17 FT.
THU
NW WINDS 10 TO 20 KT. SEAS 8 TO 13 FT.
THU NIGHT
W WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
FRI
W WINDS 15 TO 25 KT. SEAS 8 TO 13 FT.
FRI NIGHT
N WINDS 15 TO 25 KT. SEAS 8 TO 13 FT.
SAT
NE WINDS 10 TO 15 KT, SHIFTING TO S IN THE AFTERNOON.
SEAS 7 TO 10 FT.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
BAHAMAS N OF 22N
THIS AFTERNOON
N WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
N WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
WED
N WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 4 TO 6 FT.
WED NIGHT
N WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 5 TO 7 FT.
THU
N WINDS LESS THAN 10 KT IN THE MORNING, BECOMING VARIABLE
WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
THU NIGHT
W WINDS LESS THAN 10 KT, SHIFTING TO NW AFTER
MIDNIGHT. SEAS 3 TO 5 FT.
FRI
N WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
SAT NIGHT
E WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
THIS AFTERNOON
NW WINDS 15 TO 25 KT W OF 70W, AND W 10 TO
20 KT ELSEWHERE. SEAS 7 TO 10 FT.
TONIGHT
NW WINDS 15 TO 25 KT. SEAS 9 TO 14 FT.
WED
NW WINDS 15 TO 25 KT W OF 70W, AND W 20 TO 30 KT
ELSEWHERE. SEAS 12 TO 17 FT.
WED NIGHT
NW WINDS 15 TO 25 KT W OF 70W, AND NW 20 TO 30 KT
ELSEWHERE. SEAS 13 TO 18 FT.
THU
NW WINDS 10 TO 20 KT. SEAS 10 TO 15 FT.
THU NIGHT
NW WINDS 10 TO 15 KT. SEAS 7 TO 10 FT.
FRI
W WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
FRI NIGHT
N WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
SAT
NE WINDS 10 TO 15 KT, SHIFTING TO E IN THE AFTERNOON.
SEAS 6 TO 8 FT.
SAT NIGHT
SE WINDS LESS THAN 10 KT. SEAS 6 TO 8 FT.
ATLC WATERS S OF 22N W OF 65W
THIS AFTERNOON
W WINDS LESS THAN 10 KT, INCREASING TO 10 TO
15 KT IN THE AFTERNOON. SEAS 4 TO 6 FT.
TONIGHT
NW WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
WED
NW WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
WED NIGHT
NW WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
THU
NW WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 7 TO 10 FT.
THU NIGHT
NW WINDS LESS THAN 10 KT. SEAS 6 TO 9 FT.
FRI
VARIABLE WINDS LESS THAN 10 KT, BECOMING NW LESS THAN
10 KT IN THE AFTERNOON. SEAS 4 TO 6 FT.
FRI NIGHT
NE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
SAT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W
THIS AFTERNOON
SW WINDS 10 TO 15 KT. SEAS 7 TO 9 FT.
TONIGHT
SW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
WED
SW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
WED NIGHT
SW WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
THU
SW WINDS 10 TO 15 KT. SEAS 8 TO 11 FT.
THU NIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT
AFTER MIDNIGHT. SEAS 8 TO 11 FT.
FRI
S WINDS LESS THAN 10 KT. SEAS 7 TO 10 FT.
FRI NIGHT
S WINDS LESS THAN 10 KT, SHIFTING TO NE AFTER
MIDNIGHT. SEAS 6 TO 8 FT.
SAT
E WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
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