541
FZNT31 KNHC 240853
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
453 AM EDT SUN AUG 24 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 TRADES AND MODERATE TO LOCALLY ROUGH
SEAS WILL PREVAIL TODAY AS CENTRAL ATLANTIC HIGH PRESSURE BUILDS
W-SW ACROSS THE WESTERN ATLANTIC. FRESH TO STRONG WINDS WILL
THEN EXPAND ACROSS MOST OF CENTRAL AND EASTERN PORTIONS, AND THE
WINDWARD PASSAGE, TONIGHT THROUGH WED AS A STRONG TROPICAL WAVE
MOVES THROUGH THE BASIN. LOCALLY HEAVY RAINFALL, STRONG GUSTY
WINDS, AND SQUALLS AND THUNDERSTORMS ARE EXPECTED TO ACCOMPANY
THIS TROPICAL WAVE ACROSS EAST AND CENTRAL PORTIONS THROUGH LATE
WED. THIS FEATURE HAS A MEDIUM CHANCE OF TROPICAL CYCLONE
FORMATION. FRESH TO STRONG E TO SE WINDS WILL PULSE ACROSS THE
GULF OF HONDURAS AT NIGHT THROUGH TUE. NW TO N SWELL WILL BUILD
ACROSS THE TROPICAL ATLANTIC WATERS AND MOVE THROUGH THE
ATLANTIC PASSAGES THROUGH EARLY MON.
NW CARIBBEAN W OF 85W
TODAY
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
MON
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
MON NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TUE NIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
WED
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
WED NIGHT
E WINDS LESS THAN 10 KT. SEAS 3 FT.
THU
NE WINDS LESS THAN 10 KT. SEAS 3 FT.
THU NIGHT
E WINDS LESS THAN 10 KT. SEAS 3 FT.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
TODAY
E WINDS 10 TO 15 KT. S OF 18N, SEAS 3 TO 5 FT.
ELSEWHERE, SEAS 3 FT IN THE MORNING, SUBSIDING TO 2 FT OR LESS.
TONIGHT
E WINDS 10 TO 20 KT S OF 18N, AND E LESS THAN 10 KT
ELSEWHERE. SEAS 4 TO 6 FT S OF 18N, AND 3 FT ELSEWHERE.
MON
E WINDS 10 TO 20 KT. S OF 18N, SEAS 4 TO 6 FT. ELSEWHERE,
SEAS 2 FT OR LESS, BUILDING TO 3 FT IN THE AFTERNOON.
MON NIGHT
E WINDS 10 TO 20 KT S OF 18N, AND NE LESS THAN
10 KT ELSEWHERE. S OF 18N, SEAS 5 TO 7 FT. ELSEWHERE, SEAS 2 FT
OR LESS, BUILDING TO 3 TO 4 FT AFTER MIDNIGHT.
TUE
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
WED
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
CARIBBEAN FROM 11N TO 15N W OF 72W
TODAY
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.
TONIGHT
E WINDS 15 TO 25 KT WITHIN 90 NM OF COAST OF
COLOMBIA, AND E 10 TO 20 KT ELSEWHERE. SEAS 7 TO 10 FT WITHIN
90 NM OF COAST OF COLOMBIA, AND 5 TO 7 FT ELSEWHERE.
MON
E WINDS 15 TO 25 KT WITHIN 90 NM OF COAST OF COLOMBIA,
AND E 10 TO 20 KT ELSEWHERE. SEAS 7 TO 10 FT WITHIN 90 NM OF
COAST OF COLOMBIA, AND 6 TO 8 FT ELSEWHERE.
MON NIGHT
NE WINDS 15 TO 25 KT WITHIN 90 NM OF COAST OF
COLOMBIA, AND NE 10 TO 20 KT ELSEWHERE. SEAS 6 TO 8 FT.
TUE
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
TUE NIGHT
NE WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
WED
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
THU
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
THU NIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SW CARIBBEAN S OF 11N
TODAY
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
TONIGHT
N WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
MON
NW WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
MON NIGHT
N WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TUE
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
TUE NIGHT
N WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
WED
SW WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
WED NIGHT
NW WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
THU
SW WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
THU NIGHT
W WINDS LESS THAN 10 KT IN THE EVENING, BECOMING
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
CARIBBEAN BETWEEN 64W AND 72W
TODAY
E WINDS 15 TO 25 KT GULF OF VENEZUELA, AND E 10 TO
20 KT ELSEWHERE. SEAS 4 TO 6 FT.
TONIGHT
E WINDS 20 TO 30 KT GULF OF VENEZUELA, AND E 10 TO
20 KT ELSEWHERE. SEAS 5 TO 7 FT.
MON
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 5 TO 7 FT
ELSEWHERE.
MON NIGHT
E WINDS 15 TO 25 KT. SEAS 3 TO 5 FT GULF OF
VENEZUELA, AND 6 TO 8 FT ELSEWHERE.
TUE
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
TUE NIGHT
E WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
WED
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
WED NIGHT
E WINDS 10 TO 20 KT. 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.
OFFSHORE LEEWARD ISLANDS AND ADJACENT ATLC WATERS FROM 15N TO
19N W OF 55W
TODAY
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
MON
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TUE NIGHT
E WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
WED
SE WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
WED NIGHT
E WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
THU
E WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
THU NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
OFFSHORE WINDWARD ISLANDS AND ADJACENT ATLC WATERS FROM 07N TO
15N W OF 55W
TODAY
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
MON
SE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
WED
SE 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 3 TO 5 FT.
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS
SYNOPSIS
TROPICAL STORM FERNAND IS NEAR 29.7N 60.7W AT 5 AM
EDT, AND IS MOVING NORTH-NORTHEAST AT 13 KT. MAXIMUM SUSTAINED
WINDS ARE 35 KT WITH GUSTS TO 45 KT, AND THE MINIMUM CENTRAL
PRESSURE IS 1010 MB. FERNAND WILL MOVE TO JUST N OF THE AREA AT
31.3N 60.1W THIS AFTERNOON, THEN CONTINUING AWAY FROM THE AREA
TO 33.6N 59.1W MON MORNING. CENTRAL ATLANTIC HIGH PRESSURE WILL
THEN BUILD W-SW AND INTO THE NW BAHAMAS MON THROUGH WED.
MEANWHILE, LARGE NORTHERLY SWELL GENERATED BY DISTANT
EXTRATROPICAL CYCLONE ERIN WILL CONTINUE TO AFFECT THE W
ATLANTIC WATERS THROUGH THE NEXT COUPLE OF DAYS. A STATIONARY
FRONT WILL LINGER OFF THE SE U.S. COAST INTO THE EARLY PART OF
THE WEEK WITH FRESH WINDS SE OF IT. FRESH TO STRONG WINDS WILL
PULSE N OF HISPANIOLA MON AFTERNOON THROUGH TUE AFTERNOON.
TRANQUIL MARINE CONDITIONS MAY PREVAIL BY THE END OF NEXT WEEK.
ATLC WATERS FROM 27N TO 31N W OF 77W
TODAY
SW WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
TONIGHT
SW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
MON
SW WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
MON NIGHT
SW WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.
TUE
SW WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
TUE NIGHT
SW WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
WED
W WINDS LESS THAN 10 KT IN THE MORNING, BECOMING VARIABLE
WINDS LESS THAN 10 KT. SEAS 3 FT.
WED NIGHT
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 FT.
THU
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 FT.
THU NIGHT
SE WINDS LESS THAN 10 KT. SEAS 3 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
TODAY
W OF 70W, SW WINDS 10 TO 20 KT. ELSEWHERE, VARIABLE
WINDS LESS THAN 10 KT, BECOMING SW LESS THAN 10 KT IN THE
AFTERNOON. SEAS 7 TO 9 FT.
TONIGHT
SW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
MON
SW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
MON NIGHT
W OF 70W, SW WINDS 10 TO 15 KT. ELSEWHERE, SW WINDS
10 TO 15 KT, SHIFTING TO S AFTER MIDNIGHT. SEAS 5 TO 7 FT.
TUE
S WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 4 TO 6 FT.
TUE NIGHT
S WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
WED
S WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
WED NIGHT
SE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
THU
SE WINDS LESS THAN 10 KT IN THE MORNING, BECOMING
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
THU NIGHT
SE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
BAHAMAS N OF 22N
TODAY
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
TONIGHT
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
MON
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
MON NIGHT
E WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 3 TO 4 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
WED
E 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 10 TO 15 KT. SEAS 3 FT.
THU NIGHT
E WINDS 10 TO 15 KT. SEAS 3 FT.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
TODAY
SE WINDS LESS THAN 10 KT. SEAS 7 TO 8 FT.
TONIGHT
SE WINDS LESS THAN 10 KT. SEAS 6 TO 7 FT.
MON
SE WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
MON NIGHT
SE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
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 LESS THAN 10 KT. SEAS 4 TO 5 FT.
THU
SE WINDS 10 KT. SEAS 3 TO 5 FT.
THU NIGHT
SE WINDS 10 KT. SEAS 3 TO 4 FT.
ATLC WATERS S OF 22N W OF 65W
TODAY
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
MON
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
MON NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
TUE
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 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 LESS THAN 10 KT. SEAS 3 TO 5 FT.
THU NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W
TODAY
E WINDS 10 TO 15 KT. SEAS 7 TO 8 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 7 TO 8 FT.
MON
E WINDS 10 TO 15 KT. SEAS 7 TO 9 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 7 TO 8 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.
WED
SE WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.
WED NIGHT
SE WINDS 10 KT. SEAS 5 TO 6 FT.
THU
SE WINDS 10 KT. SEAS 4 TO 5 FT.
THU NIGHT
E WINDS 10 KT. SEAS 4 TO 5 FT.
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