781
FZNT31 KNHC 180923
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
523 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 TO STRONG N WINDS AND ROUGH SEAS FOLLOW A COLD
FRONT THAT EXTENDS FROM SE CUBA TO CABO GRACIAS A DIOS, HONDURAS.
THE WEAKENING FRONTAL BOUNDARY WILL CONTINUE EASTWARD BEFORE
DISSIPATING TONIGHT INTO WED. 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 LATE TODAY THROUGH WED EVENING. IN THE CENTRAL
AND PORTIONS OF THE SW CARIBBEAN, FRESH TO STRONG NE-E WINDS WILL
PREVAIL THROUGH EARLY NEXT WEEK. 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. ROUGH TO VERY ROUGH SEAS WILL BUILD OFF COLOMBIA AND
INTO THE SW CARIBBEAN WED NIGHT INTO THE WEEKEND.
NW CARIBBEAN W OF 85W
TODAY
NE WINDS 10 TO 20 KT. SEAS 6 TO 9 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
TODAY
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
TODAY
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
TODAY
N WINDS 10 TO 20 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
TODAY
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 15 TO 20 KT GULF OF VENEZUELA, AND NE
10 TO 15 KT ELSEWHERE. 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
TODAY
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
TODAY
SE WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. 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
A 1007 MB LOW PRES NEAR 25N58W IS PRODUCING STRONG
TO NEAR GALE-FORCE E-SE WINDS NORTH OF 26N AND BETWEEN 43W AND
61W. ROUGH TO VERY ROUGH SEAS IN THE AREA DESCRIBED. THESE WINDS
AND SEAS WILL PERSIST IN THE NORTHERN SEMICIRCLE AS THE LOW MOVES
NORTH AND EXITS THE FORECAST WATERS BY WED MORNING. STRONG TO
NEAR GALE-FORCE WINDS WILL PRECEDE AND CONTINUE TO FOLLOW A COLD
FRONT THAT EXTENDS FROM 31N71W TO E CUBA. 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, WHICH WILL SUPPORT THE
DEVELOPMENT OF GALE-FORCE WINDS AND VERY ROUGH SEAS BETWEEN
BERMUDA AND THE BAHAMAS TONIGHT THROUGH WED EVENING. AFTERWARD,
WINDS AND SEAS WILL GRADUALLY DIMINISH ACROSS THE REGION THROUGH
THU NIGHT. LOOKING AHEAD, A THIRD STRONG FRONT IS FORECAST TO
COME OFF THE FLORIDA NE COAST THU.
ATLC WATERS FROM 27N TO 31N W OF 77W
TODAY
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
TODAY
NW WINDS 15 TO 25 KT W OF 70W, AND W 10 TO 20 KT
ELSEWHERE. W OF 70W, SEAS 8 TO 11 FT, BUILDING TO 9 TO 14 FT IN
THE AFTERNOON. ELSEWHERE, SEAS 7 TO 9 FT.
TONIGHT
NW WINDS 25 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
TODAY
N WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
N WINDS 10 TO 20 KT. SEAS 5 TO 7 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
TODAY
NW WINDS 15 TO 25 KT W OF 70W, AND SW 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
TODAY
SW WINDS LESS THAN 10 KT, SHIFTING TO W 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
TODAY
W WINDS 10 TO 15 KT. SEAS 7 TO 10 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
SW 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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