428
FZNT31 KNHC 100921
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
521 AM EDT SAT MAY 10 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
BUILDING RIDGE NORTH OF THE AREA WILL SUPPORT FRESH
TO STRONG NE-E WINDS AND ROUGH SEAS ACROSS MUCH OF THE CENTRAL
CARIBBEAN THROUGH EARLY NEXT WEEK. THE STRONGEST WINDS AND
HIGHEST SEAS WILL OCCUR OFF NW COLOMBIA. ELSEWHERE, A MODERATE
PRESSURE GRADIENT WILL SUSTAIN FRESH TO LOCALLY STRONG E WINDS
IN THE GULF OF HONDURAS EARLY THIS MORNING AND EVENING. FRESH TO
LOCALLY STRONG NE WINDS WILL ALSO PULSE THROUGH THE WINDWARD
PASSAGE AND OFF SOUTHERN HISPANIOLA INTO EARLY NEXT WEEK.
NW CARIBBEAN W OF 85W
TODAY
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SUN
SE WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 3 TO 5 FT.
SUN NIGHT
SE WINDS LESS THAN 10 KT IN THE EVENING, BECOMING
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
MON
VARIABLE WINDS LESS THAN 10 KT, BECOMING NE LESS THAN
10 KT IN THE AFTERNOON. SEAS 3 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
TUE
E WINDS LESS THAN 10 KT. SEAS 3 FT.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 3 FT.
WED
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
WED NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
TODAY
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT S OF 18N, AND
3 TO 5 FT ELSEWHERE.
SUN
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
SUN NIGHT
S OF 18N, E WINDS 10 TO 20 KT. ELSEWHERE, E WINDS
10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT AFTER MIDNIGHT. SEAS
5 TO 7 FT.
MON
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 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
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
WED NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 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 20 TO 25 KT WITHIN 90 NM OF COAST OF
COLOMBIA, AND E 15 TO 25 KT ELSEWHERE. SEAS 6 TO 9 FT.
SUN
E WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
SUN NIGHT
E WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
MON
E WINDS 15 TO 25 KT. SEAS 7 TO 10 FT.
MON NIGHT
NE WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
TUE
E WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
TUE NIGHT
NE 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 15 KT. SEAS 5 TO 7 FT.
SW CARIBBEAN S OF 11N
TODAY
NE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SUN
NE WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 5 TO 7 FT.
SUN NIGHT
N WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
MON
NE WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 6 TO 8 FT.
MON NIGHT
N WINDS LESS THAN 10 KT, SHIFTING TO NE AFTER
MIDNIGHT. SEAS 6 TO 8 FT.
TUE
NE WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
TUE NIGHT
N WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 6 TO 8 FT.
WED
NE WINDS 10 TO 15 KT, SHIFTING TO W IN THE AFTERNOON.
SEAS 5 TO 7 FT.
WED NIGHT
W WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT.
CARIBBEAN BETWEEN 64W AND 72W
TODAY
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
E WINDS 15 TO 25 KT GULF OF VENEZUELA, AND E 10 TO
20 KT ELSEWHERE. SEAS 5 TO 7 FT.
SUN
GULF OF VENEZUELA, E WINDS 20 TO 25 KT, DIMINISHING TO
10 TO 20 KT IN THE AFTERNOON. ELSEWHERE, E WINDS 10 TO 20 KT.
SEAS 3 TO 5 FT GULF OF VENEZUELA, AND 6 TO 8 FT ELSEWHERE.
SUN NIGHT
E WINDS 20 TO 30 KT GULF OF VENEZUELA, AND E 10 TO
20 KT ELSEWHERE. SEAS 6 TO 8 FT.
MON
E WINDS 10 TO 20 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 5 TO 7 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
OFFSHORE LEEWARD ISLANDS AND ADJACENT ATLC WATERS FROM 15N TO
19N W OF 55W
TODAY
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
SUN NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
MON
E WINDS 10 TO 20 KT. SEAS 6 TO 8 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 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 5 TO 7 FT.
OFFSHORE WINDWARD ISLANDS AND ADJACENT ATLC WATERS FROM 07N TO
15N W OF 55W
TODAY
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
SUN
E WINDS 10 TO 15 KT. SEAS 4 TO 6 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 5 TO 7 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
WED
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
WED NIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS
SYNOPSIS
THE PRESSURE GRADIENT BETWEEN A SURFACE TROUGH ALONG
68W AND A BUILDING RIDGE IN THE CENTRAL ATLANTIC RESULT IN
MODERATE TO FRESH E-SE WINDS AND MODERATE SEAS EAST OF 65W.
FRESH WINDS AND MODERATE TO ROUGH SEAS WILL SHIFT SOUTHWARD OVER
THE NEXT FEW DAYS, MAINLY SOUTH OF 20N BY EARLY NEXT WEEK.
FARTHER WEST, MODERATE TO FRESH SE WINDS ARE FORECAST TO DEVELOP
OFFSHORE OF FLORIDA AND THE BAHAMAS BY TONIGHT AHEAD OF A COLD
FRONT MOVING THROUGH THE EASTERN GULF OF AMERICA. LOOKING AHEAD,
STRONG S WINDS AND ROUGH SEAS MAY DEVELOP OFFSHORE NE FLORIDA
EARLY NEXT WEEK AS THE COLD FRONT IN THE GULF OF AMERICA MOVES
INTO THE WESTERN ATLANTIC. THE MARINE CONDITIONS WILL IMPROVE BY
MIDWEEK.
ATLC WATERS FROM 27N TO 31N W OF 77W
TODAY
S WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
TONIGHT
SE WINDS 10 TO 20 KT. SEAS 4 TO 5 FT.
SUN
SE WINDS 10 TO 20 KT. SEAS 5 TO 6 FT.
SUN NIGHT
SE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
MON
SE WINDS 15 TO 25 KT. SEAS 6 TO 8 FT.
MON NIGHT
SE WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
TUE
SW WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
WED
W WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 3 TO 5 FT.
WED NIGHT
SW WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 3 TO 4 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
TODAY
W OF 70W, S WINDS LESS THAN 10 KT. ELSEWHERE, S WINDS
10 TO 15 KT, SHIFTING TO SW IN THE AFTERNOON. SEAS 4 TO 6 FT.
TONIGHT
W OF 70W, VARIABLE WINDS LESS THAN 10 KT, BECOMING E
10 TO 15 KT AFTER MIDNIGHT. ELSEWHERE, SE WINDS LESS THAN 10 KT.
SEAS 4 TO 5 FT.
SUN
E WINDS 10 TO 15 KT W OF 70W, AND VARIABLE LESS THAN
10 KT ELSEWHERE. SEAS 4 TO 5 FT.
SUN NIGHT
E WINDS 10 TO 15 KT W OF 70W, AND NE LESS THAN
10 KT ELSEWHERE. SEAS 4 TO 5 FT.
MON
E WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE
SE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TUE NIGHT
S WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
WED
S WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
WED NIGHT
S WINDS LESS THAN 10 KT, SHIFTING TO SW AFTER
MIDNIGHT. SEAS 4 TO 5 FT.
BAHAMAS N OF 22N
TODAY
SE WINDS 10 TO 15 KT. SEAS 3 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
SUN
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SUN NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
MON
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
MON NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TUE
SE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
TUE NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
WED
SE WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 3 TO 4 FT.
WED NIGHT
SE WINDS LESS THAN 10 KT. SEAS 3 FT IN THE EVENING,
SUBSIDING TO 2 FT OR LESS.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
TODAY
E WINDS LESS THAN 10 KT. SEAS 4 TO 5 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.
SUN
E WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.
SUN NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.
MON
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE
SE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TUE NIGHT
SE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
WED
SE WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.
WED NIGHT
SE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
ATLC WATERS S OF 22N W OF 65W
TODAY
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TONIGHT
E WINDS 10 TO 20 KT. 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. SEAS 4 TO 6 FT.
MON
E WINDS 10 TO 15 KT. SEAS 4 TO 6 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 15 KT. SEAS 5 TO 7 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.
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W
TODAY
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
SUN NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
MON
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
MON NIGHT
E WINDS 15 TO 20 KT. SEAS 6 TO 7 FT.
TUE
E WINDS 15 TO 20 KT. SEAS 6 TO 7 FT.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 6 TO 7 FT.
WED
E WINDS 10 TO 15 KT. SEAS 6 TO 7 FT.
WED NIGHT
E WINDS 10 TO 15 KT. SEAS 6 TO 7 FT.
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