995
FZNT31 KNHC 232025
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
425 PM EDT SAT AUG 23 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 RETURN TO THE SOUTH-CENTRAL CARIBBEAN THIS EVENING
THROUGH SUN 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, SUN NIGHT 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 SUN EVENING
THROUGH LATE WED. 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 TONIGHT THROUGH EARLY MON.
NW CARIBBEAN W OF 85W
TONIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SUN
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SUN NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
MON
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
MON NIGHT
E WINDS 10 TO 15 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 LESS THAN 10 KT. SEAS 3 TO 4 FT.
WED NIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
THU
NE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
THU NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
TONIGHT
E WINDS 10 TO 15 KT S OF 18N, AND E LESS THAN 10 KT
ELSEWHERE. SEAS 3 TO 5 FT.
SUN
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
SUN NIGHT
E WINDS 10 TO 20 KT S OF 18N, AND E LESS THAN 10 KT
ELSEWHERE. SEAS 5 TO 7 FT S OF 18N, AND 3 TO 4 FT ELSEWHERE.
MON
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT S OF 18N, AND 3 TO
4 FT ELSEWHERE.
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 5 TO 7 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.
CARIBBEAN FROM 11N TO 15N W OF 72W
TONIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SUN
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.
SUN NIGHT
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 6 TO 9 FT.
MON NIGHT
NE WINDS 10 TO 20 KT. 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 8 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 20 KT. SEAS 5 TO 7 FT.
SW CARIBBEAN S OF 11N
TONIGHT
N WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
SUN
NE WINDS LESS THAN 10 KT IN THE MORNING, BECOMING
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
SUN NIGHT
N WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
MON
W WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
MON NIGHT
N WINDS LESS THAN 10 KT, SHIFTING TO NE AFTER
MIDNIGHT. SEAS 5 TO 7 FT.
TUE
NE WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 5 TO 7 FT.
TUE NIGHT
N WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
WED
W WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
WED NIGHT
NW WINDS LESS THAN 10 KT. SEAS 4 TO 5 FT.
THU
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
THU NIGHT
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
CARIBBEAN BETWEEN 64W AND 72W
TONIGHT
GULF OF VENEZUELA, NE WINDS 10 TO 20 KT, SHIFTING TO
E 20 TO 25 KT AFTER MIDNIGHT. ELSEWHERE, E WINDS 10 TO 20 KT.
SEAS 4 TO 6 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SUN NIGHT
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 6 TO 8 FT
ELSEWHERE.
MON NIGHT
E WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
TUE
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
TUE NIGHT
E WINDS 10 TO 20 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
TONIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
SUN NIGHT
E WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.
MON
E WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
TUE NIGHT
E WINDS 10 KT. SEAS 5 TO 7 FT.
WED
SE WINDS 10 KT. SEAS 4 TO 6 FT.
WED NIGHT
E WINDS 10 KT. SEAS 4 TO 6 FT.
THU
E WINDS 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
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SUN
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
SUN NIGHT
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
MON
SE WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
MON NIGHT
E 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 5 TO 7 FT.
WED
SE WINDS 10 TO 15 KT. SEAS 5 TO 7 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.
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS
SYNOPSIS
LARGE NORTHERLY SWELL GENERATED BY EXTRATROPICAL
CYCLONE ERIN WILL CONTINUE TO AFFECT THE W ATLANTIC WATERS
THROUGH THE NEXT FEW DAYS. WEAK HIGH PRESSURE HAS DEVELOPED
ALONG 70W, TO THE EAST OF THE CENTRAL BAHAMAS. NEWLY FORMED
TROPICAL STORM FERNAND IS LOCATED AT 27.2N 61.4W AT 2100 UTC,
MOVING N AT 13 KT. MAXIMUM SUSTAINED WINDS ARE 35 KT GUSTS TO 45
KT. MINIMUM CENTRAL PRESSURE IS 1010 MB. FERNAND WILL MOVE N-NE
AND SLOWLY STRENGTHEN BEFORE EXITING THE AREA NORTH OF 31N SUN
AFTERNOON. CENTRAL ATLANTIC HIGH PRESSURE WILL THEN BUILD W-SW
AND INTO THE NW BAHAMAS MON THROUGH WED. A SLOW MOVING COLD FRONT
WILL MOVE OFF THE SE U.S. INTO THE NW WATERS WED THROUGH THU.
ATLC WATERS FROM 27N TO 31N W OF 77W
TONIGHT
SW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
SUN
SW WINDS 10 TO 15 KT. SEAS 6 TO 7 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 6 TO 7 FT.
MON
SW WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
MON NIGHT
SW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE
SW WINDS LESS THAN 10 KT. SEAS 4 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 TO 4 FT.
WED NIGHT
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
THU
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
THU NIGHT
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
TONIGHT
SW WINDS 10 TO 15 KT W OF 70W, AND VARIABLE LESS THAN
10 KT ELSEWHERE. SEAS 7 TO 10 FT.
SUN
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.
SUN NIGHT
SW WINDS 10 TO 20 KT. SEAS 7 TO 8 FT.
MON
SW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
MON NIGHT
SW WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TUE
S WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE NIGHT
S WINDS 10 KT. SEAS 4 TO 5 FT.
WED
S WINDS LESS THAN 10 KT. SEAS 4 TO 5 FT.
WED NIGHT
SE WINDS LESS THAN 10 KT. SEAS 4 TO 5 FT.
THU
SE WINDS LESS THAN 10 KT IN THE MORNING, BECOMING
VARIABLE WINDS LESS THAN 10 KT. SEAS 4 FT.
THU NIGHT
SE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
BAHAMAS N OF 22N
TONIGHT
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
SUN
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
SUN NIGHT
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, SHIFTING TO SE AFTER
MIDNIGHT. SEAS 3 TO 5 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TUE NIGHT
SE 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 4 FT.
THU
E WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 3 TO 5 FT.
THU NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
TONIGHT
SE WINDS LESS THAN 10 KT. SEAS 7 TO 9 FT.
SUN
SE WINDS LESS THAN 10 KT. SEAS 7 TO 8 FT.
SUN NIGHT
SE WINDS LESS THAN 10 KT. SEAS 7 TO 8 FT.
MON
W OF 70W, SE WINDS 10 TO 15 KT. ELSEWHERE, SE WINDS LESS
THAN 10 KT, INCREASING TO 10 TO 15 KT IN THE AFTERNOON. SEAS
6 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 5 TO 7 FT.
WED
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
WED NIGHT
E WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
THU
SE WINDS 10 KT. SEAS 4 TO 5 FT.
THU NIGHT
SE WINDS 10 KT. SEAS 3 TO 4 FT.
ATLC WATERS S OF 22N W OF 65W
TONIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SUN
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SUN NIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
MON
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
MON NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
TUE
E WINDS 10 TO 20 KT. SEAS 6 TO 8 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 15 KT. SEAS 4 TO 6 FT.
THU
SE WINDS 10 TO 15 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
TONIGHT
E WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 6 TO 8 FT.
SUN
E WINDS 10 TO 15 KT. SEAS 7 TO 9 FT.
SUN NIGHT
E WINDS 10 TO 15 KT. SEAS 8 TO 9 FT.
MON
E WINDS 10 TO 20 KT. SEAS 8 TO 9 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 7 TO 9 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 6 TO 7 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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page