370
FZNT31 KNHC 090919
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
419 AM EST TUE DEC 9 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
MODERATE TO OCCASIONALLY FRESH TRADE WINDS AND
MODERATE SEAS ARE EXPECTED OVER THE CENTRAL AND EASTERN
CARIBBEAN TODAY AS WEAK RIDGING PREVAILS OVER THE CENTRAL
ATLANTIC. WINDS WILL BEGIN TO PULSE TO STRONG SPEEDS IN THE GULF
OF VENEZUELA AND OFFSHORE OF NORTHERN COLOMBIA STARTING THIS
EVENING. LOCALLY ROUGH SEAS MAY DEVELOP NEAR AND TO THE WEST OF
THESE WINDS. A TIGHTENING PRESSURE GRADIENT BETWEEN A WEAKENING
COLD FRONT APPROACHING THE NORTHWESTERN CARIBBEAN AND LOW
PRESSURE IN THE SOUTH-CENTRAL BASIN WILL SUPPORT FRESH TO STRONG
TRADE WINDS AND ROUGH SEAS IN THE CENTRAL CARIBBEAN BEGINNING ON
WED AND INTO THE UPCOMING WEEKEND. WINDS MAY APPROACH NEAR GALE-
FORCE OFFSHORE OF COLOMBIA LATE WED. ELSEWHERE, A PERSISTENT
EAST SWELL WILL CONTINUE TO LEAD TO ROUGH SEAS OVER THE ATLANTIC
WATERS AND PASSAGES OF THE LESSER ANTILLES INTO EARLY WED BEFORE
SEAS SLIGHTLY SUBSIDE. NEW MIXED NORTH AND EAST SWELL IS
EXPECTED TO BRING ROUGH SEAS OVER THESE SAME WATERS STARTING
LATE WED NIGHT.
NW CARIBBEAN W OF 85W
TODAY
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 FT.
TONIGHT
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
WED
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
WED NIGHT
NE WINDS LESS THAN 10 KT. SEAS 3 FT.
THU
NE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
THU NIGHT
NE WINDS 10 TO 15 KT, SHIFTING TO E AFTER MIDNIGHT.
SEAS 3 TO 4 FT.
FRI
E WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 3 TO 4 FT.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
SAT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
TODAY
E WINDS 10 TO 15 KT S OF 18N, AND E LESS THAN 10 KT
ELSEWHERE. SEAS 3 TO 5 FT S OF 18N, AND 2 FT OR LESS ELSEWHERE.
TONIGHT
E WINDS 10 TO 15 KT S OF 18N, AND E LESS THAN 10 KT
ELSEWHERE. SEAS 3 TO 5 FT S OF 18N, AND 2 FT OR LESS ELSEWHERE.
WED
E WINDS 10 TO 20 KT S OF 18N, AND E LESS THAN 10 KT
ELSEWHERE. SEAS 3 TO 5 FT S OF 18N, AND 2 FT OR LESS ELSEWHERE.
WED NIGHT
E WINDS 10 TO 20 KT S OF 18N, AND NE LESS THAN
10 KT ELSEWHERE. SEAS 4 TO 6 FT S OF 18N, AND 2 FT OR LESS
ELSEWHERE.
THU
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
THU NIGHT
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
FRI NIGHT
E 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
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
E WINDS 15 TO 25 KT WITHIN 90 NM OF COAST OF
COLOMBIA, AND NE 10 TO 20 KT ELSEWHERE. SEAS 4 TO 6 FT.
WED
E WINDS 15 TO 25 KT WITHIN 90 NM OF COAST OF COLOMBIA,
AND E 10 TO 20 KT ELSEWHERE. SEAS 5 TO 7 FT.
WED NIGHT
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 10 TO 20 KT. SEAS 6 TO 9 FT.
THU NIGHT
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
FRI NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
SAT
E WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
SW CARIBBEAN S OF 11N
TODAY
N WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
TONIGHT
N WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
WED
N WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
WED NIGHT
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
THU
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
THU NIGHT
NE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
FRI
NE WINDS 10 TO 15 KT, SHIFTING TO N IN THE AFTERNOON.
SEAS 6 TO 8 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SAT
E WINDS 10 TO 15 KT, SHIFTING TO NE IN THE AFTERNOON.
SEAS 6 TO 8 FT.
SAT NIGHT
N WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
CARIBBEAN BETWEEN 64W AND 72W
TODAY
E WINDS 10 TO 20 KT. SEAS 3 FT GULF OF VENEZUELA, AND
4 TO 6 FT ELSEWHERE.
TONIGHT
E WINDS 15 TO 25 KT GULF OF VENEZUELA, AND E 10 TO
20 KT ELSEWHERE. SEAS 5 TO 7 FT.
WED
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
WED NIGHT
E WINDS 15 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 5 TO 7 FT.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 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 5 TO 7 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
OFFSHORE LEEWARD ISLANDS AND ADJACENT ATLC WATERS FROM 15N TO
19N W OF 55W
TODAY
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
WED
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
WED NIGHT
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 7 TO 10 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
FRI NIGHT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
SAT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
OFFSHORE WINDWARD ISLANDS AND ADJACENT ATLC WATERS FROM 07N TO
15N W OF 55W
TODAY
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
WED
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
WED NIGHT
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 7 TO 10 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
FRI NIGHT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
SAT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS
SYNOPSIS
A COLD FRONT EXTENDING FROM NEAR 31N64W TO 26N71W
AND TO 25N76W WILL WEAKEN AS IT REACHES FROM NEAR 31N60W TO
27N68W, STATIONARY FRONT TO THE CENTRAL BAHAMAS AND STRAITS OF
FLORIDA BY EARLY TONIGHT. THE FRONT IS CURRENTLY PRECEDED BY
FRESH TO NEAR GALE SOUTHWEST WINDS NORTH OF 27N THROUGH TUE.
ROUGH SEAS IN WEST SWELL EAST OF 68W WILL BE REINFORCED BY
ADDITIONAL LARGE NORTHWEST SWELL TODAY THROUGH LATE TONIGHT
FOLLOWING IN BEHIND A STRONGER COLD FRONT THAT WILL QUICKLY MOVE
EASTWARD OVERTAKING THE FIRST FRONT TONIGHT. THIS NEXT FRONT IS
FOLLOWED TODAY BY FRESH TO STRONG NORTHWEST WINDS NORTH OF ABOUT
28N BETWEEN 67W AND 80W. BY LATE THIS AFTERNOON THESE WINDS ARE
EXPECTED TO BE NORTH OF 29N BETWEEN 60W AND 66W BEFORE SHIFTING
NORTHEAST OF THE AREA LATE TONIGHT AS THE FRONT BEGINS TO STALL.
THE NORTHWEST SWELL GRADUALLY SUBSIDE WED AND WED NIGHT AS IT
SHIFTS TO THE NE FORECAST WATERS. AT THAT SAME TIME ROUGH SEAS IN
LONG PERIOD EAST SWELL WILL BEGIN TO MOVE INTO THE SOUTHEAST
FORECAST WATERS AND LINGER THROUGH THE REMAINDER OF THE FORECAST
PERIOD. LOOKING AHEAD, FRESH TO LOCALLY STRONG SOUTHWEST WINDS
AND ROUGH SEAS MAY DEVELOP OFFSHORE NORTHERN FLORIDA STARTING WED
AS A LOW PRESSURE SYSTEM MOVES OFF THE EAST COAST OF THE U.S.
ITS ASSOCIATED COLD FRONT SHOULD MOVE ACROSS THE WATERS EAST OF
FLORIDA FROM WED NIGHT THROUGH THE END OF THE WEAK AS IT WEAKENS,
AND EVENTUALLY STALLING OVER THE NE OFFSHORE ZONES SAT AND
DISSIPATE SAT NIGHT. FRESH WEST TO NORTHWEST WINDS WILL FOLLOW
THE FRONT THROUGH LATE THU.
ATLC WATERS FROM 27N TO 31N W OF 77W
TODAY
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
TONIGHT
N WINDS LESS THAN 10 KT. SEAS 6 TO 8 FT.
WED
NW WINDS LESS THAN 10 KT, SHIFTING TO SW IN THE
AFTERNOON. SEAS 6 TO 7 FT.
WED NIGHT
W WINDS 15 TO 25 KT. SEAS 6 TO 8 FT.
THU
NW WINDS 15 TO 20 KT. SEAS 6 TO 8 FT.
THU NIGHT
NW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
FRI
N WINDS 10 KT IN THE MORNING, BECOMING VARIABLE WINDS
LESS THAN 10 KT. SEAS 3 TO 5 FT.
FRI NIGHT
S WINDS 10 TO 15 KT. SEAS 3 FT.
SAT
S WINDS LESS THAN 10 KT. SEAS 3 FT.
SAT NIGHT
S WINDS LESS THAN 10 KT. SEAS 3 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
TODAY
N WINDS 10 TO 20 KT W OF 70W, AND NW 15 TO 25 KT
ELSEWHERE. SEAS 7 TO 10 FT.
TONIGHT
W OF 70W, E WINDS LESS THAN 10 KT. ELSEWHERE, NE
WINDS 10 TO 15 KT, SHIFTING TO E AFTER MIDNIGHT. SEAS 8 TO
11 FT.
WED
SE WINDS LESS THAN 10 KT, SHIFTING TO S IN THE AFTERNOON.
SEAS 7 TO 10 FT.
WED NIGHT
SW WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
THU
W WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
THU NIGHT
NW WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
FRI
N WINDS LESS THAN 10 KT. SEAS 6 TO 9 FT.
FRI NIGHT
N WINDS LESS THAN 10 KT, SHIFTING TO SE AFTER
MIDNIGHT. SEAS 5 TO 7 FT.
SAT
SE WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
SAT NIGHT
SE WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
BAHAMAS N OF 22N
TODAY
N WINDS 10 TO 15 KT. SEAS 2 FT OR LESS, BUILDING TO
3 FT IN THE AFTERNOON.
TONIGHT
S WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
WED
SW WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
WED NIGHT
VARIABLE WINDS LESS THAN 10 KT, BECOMING W LESS
THAN 10 KT AFTER MIDNIGHT. SEAS 3 TO 5 FT.
THU
NW WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT IN
THE AFTERNOON. SEAS 3 TO 4 FT.
THU NIGHT
N WINDS LESS THAN 10 KT, SHIFTING TO NE AFTER
MIDNIGHT. SEAS 3 TO 4 FT.
FRI
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
SAT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
TODAY
W OF 70W, N WINDS 10 TO 15 KT. ELSEWHERE, SW WINDS
10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN THE AFTERNOON.
SEAS 4 TO 6 FT.
TONIGHT
W OF 70W, E WINDS 10 TO 15 KT, SHIFTING TO SE AFTER
MIDNIGHT. ELSEWHERE, SE WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
WED
S WINDS LESS THAN 10 KT. SEAS 6 TO 8 FT.
WED NIGHT
S WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
THU
SW WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
THU NIGHT
SW WINDS LESS THAN 10 KT, SHIFTING TO N AFTER
MIDNIGHT. SEAS 5 TO 6 FT.
FRI
NE WINDS 10 TO 15 KT. SEAS 5 TO 6 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 15 KT. SEAS 6 TO 8 FT.
ATLC WATERS S OF 22N W OF 65W
TODAY
SE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
TONIGHT
SE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
WED
SE WINDS 10 TO 15 KT. SEAS 3 TO 4 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.
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.
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W
TODAY
SE WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
WED
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
THU
SE WINDS 10 TO 20 KT. SEAS 7 TO 10 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 20 KT. SEAS 7 TO 10 FT.
SAT
E WINDS 15 TO 20 KT. SEAS 8 TO 10 FT.
SAT NIGHT
E WINDS 20 KT. SEAS 8 TO 10 FT.
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