609
FZNT31 KNHC 190917
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
517 AM EDT WED MAR 19 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 EASTERLY TRADE WINDS WILL PREVAIL
THROUGH EARLY NEXT WEEK IN THE CENTRAL CARIBBEAN. BUILDING RIDGE
NORTH OF THE AREA WILL RESULT IN AN INCREASE IN AREAL COVERAGE
OF THE WINDS FRI THROUGH THE EARLY NEXT WEEK. GALE-FORCE WINDS
WILL PULSE OFFSHORE COLOMBIA AT NIGHT ON SAT AND SUN, ALONG WITH
ROUGH TO VERY ROUGH SEAS. FRESH TO NEAR GALE-FORCE WINDS WILL
PREVAIL IN THE CENTRAL AND PORTIONS OF THE SW CARIBBEAN DURING
THE WEEKEND AND THROUGH EARLY NEXT WEEK. THE AFOREMENTIONED
RIDGE WILL ALSO SUSTAIN FRESH TO STRONG NE WINDS IN THE LEE OF
CUBA AND THE WINDWARD PASSAGE THROUGH TONIGHT. LOOKING AHEAD,
THE TAIL OF A COLD FRONT WILL ENTER THE NW CARIBBEAN EARLY FRI
AND DISSIPATE FRI EVENING.
NW CARIBBEAN W OF 85W
TODAY
E WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.
TONIGHT
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 4 FT.
THU NIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
FRI
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
SAT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
SUN NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
TODAY
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
THU
S OF 18N, E WINDS 10 TO 15 KT. ELSEWHERE, E WINDS 10 TO
15 KT, DIMINISHING TO LESS THAN 10 KT IN THE AFTERNOON. SEAS
3 TO 4 FT.
THU NIGHT
S OF 18N, NE WINDS 10 TO 15 KT. ELSEWHERE, NE WINDS
LESS THAN 10 KT, SHIFTING TO N AFTER MIDNIGHT. SEAS 3 TO 4 FT.
FRI
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI NIGHT
NE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
SAT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SAT NIGHT
E WINDS 10 TO 20 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 5 TO 7 FT.
CARIBBEAN FROM 11N TO 15N W OF 72W
..GALE CONDITIONS POSSIBLE SAT AND SUN NIGHT
TODAY
NE WINDS 10 TO 20 KT WITHIN 90 NM OF COAST OF COLOMBIA,
AND NE 10 TO 15 KT ELSEWHERE. SEAS 3 TO 5 FT.
TONIGHT
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 15 TO 25 KT WITHIN 90 NM OF COAST OF COLOMBIA,
AND NE 10 TO 20 KT ELSEWHERE. SEAS 4 TO 6 FT.
THU NIGHT
NE WINDS 15 TO 25 KT WITHIN 90 NM OF COAST OF
COLOMBIA, AND NE 10 TO 20 KT ELSEWHERE. SEAS 5 TO 7 FT.
FRI
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
FRI NIGHT
NE WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
SAT
NE WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
SAT NIGHT
NE WINDS 25 TO 35 KT. SEAS 8 TO 11 FT.
SUN
E WINDS 15 TO 25 KT. SEAS 8 TO 11 FT.
SUN NIGHT
E WINDS 25 TO 35 KT. SEAS 8 TO 11 FT.
SW CARIBBEAN S OF 11N
TODAY
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU NIGHT
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
FRI
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
FRI NIGHT
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
SAT
NE WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
SAT NIGHT
NE WINDS 15 TO 25 KT. SEAS 7 TO 10 FT.
SUN
NE WINDS 15 TO 25 KT. SEAS 8 TO 11 FT.
SUN NIGHT
NE WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.
CARIBBEAN BETWEEN 64W AND 72W
TODAY
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
TONIGHT
NE WINDS 15 TO 20 KT GULF OF VENEZUELA, AND NE 10 TO
15 KT ELSEWHERE. SEAS 3 TO 4 FT.
THU
E WINDS 10 TO 20 KT GULF OF VENEZUELA, AND E 10 TO 15 KT
ELSEWHERE. 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 10 TO 20 KT. SEAS 6 TO 8 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.
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 3 TO 5 FT.
THU
SE WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 5 TO 7 FT.
THU NIGHT
E WINDS LESS THAN 10 KT. SEAS 6 TO 9 FT.
FRI
E WINDS LESS THAN 10 KT, SHIFTING TO SE IN THE AFTERNOON.
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.
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.
OFFSHORE WINDWARD ISLANDS AND ADJACENT ATLC WATERS FROM 07N TO
15N W OF 55W
TODAY
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TONIGHT
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 6 TO 8 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.
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.
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS
SYNOPSIS
COMPLEX LOW PRESSURE SYSTEM LOCATED NEAR BERMUDA
SUPPORTS STRONG TO GALE-FORCE W-NW WINDS AND ROUGH TO VERY ROUGH
SEAS ACROSS THE SW NORTH ATLANTIC WATERS. THE STRONGEST WINDS
AND HIGHEST SEAS ARE FOUND NORTH OF 27N AND BETWEEN 69W AND 74W.
THE BROAD NON-TROPICAL SYSTEM IS FORECAST TO MAKE A COUNTER-
CLOCKWISE LOOP AND TURN NORTH ON THU, MOVING AWAY FROM OUR AREA.
THE STRONG TO GALE-FORCE WINDS AND ROUGH TO VERY ROUGH SEAS WILL
CONTINUE THROUGH TONIGHT, THEN GRADUALLY DIMINISH THROUGH FRI AS
THE WINDS AND SEAS SLIDE EASTWARD. LOOKING AHEAD, FRESH TO STRONG
SOUTHERLY WINDS WILL DEVELOP OVER THE NE FLORIDA OFFSHORE WATERS
ON THU AFTERNOON AHEAD OF A STRONG COLD FRONT FORECAST TO ENTER
THE NW OFFSHORE WATERS LATE THU. STRONG TO NEAR GALE-FORCE W-NW
WINDS AND ROUGH TO VERY ROUGH SEAS WILL FOLLOW THIS FRONT, WHICH
IS FORECAST TO REACH FROM BERMUDA TO THE CENTRAL BAHAMAS LATE
FRI. THE FRONT WILL MOVE E OF THE AREA ON SAT, ALLOWING HIGH
PRESSURE TO BUILD IN AND WINDS AND SEAS TO DIMINISH.
ATLC WATERS FROM 27N TO 31N W OF 77W
TODAY
N WINDS 10 TO 15 KT. SEAS 7 TO 10 FT.
TONIGHT
NW WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT
AFTER MIDNIGHT. SEAS 7 TO 10 FT.
THU
SW WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
THU NIGHT
W WINDS 20 TO 30 KT. SEAS 7 TO 10 FT.
FRI
NW WINDS 15 TO 25 KT. SEAS 8 TO 12 FT.
FRI NIGHT
N WINDS 10 TO 15 KT IN THE EVENING, BECOMING
VARIABLE WINDS LESS THAN 10 KT. SEAS 6 TO 9 FT.
SAT
SW WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT IN
THE AFTERNOON. SEAS 4 TO 6 FT.
SAT NIGHT
SW WINDS 10 TO 15 KT, SHIFTING TO W AFTER MIDNIGHT.
SEAS 3 TO 4 FT.
SUN
NE WINDS LESS THAN 10 KT, SHIFTING TO SE IN THE
AFTERNOON. SEAS 3 TO 4 FT.
SUN NIGHT
SE WINDS LESS THAN 10 KT, SHIFTING TO S AFTER
MIDNIGHT. SEAS 3 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
..GALE WARNING
TODAY
NW WINDS 25 TO 35 KT W OF 70W, AND NW 20 TO 30 KT
ELSEWHERE. SEAS 15 TO 20 FT.
TONIGHT
NW WINDS 25 TO 35 KT W OF 70W, AND NW 15 TO 25 KT
ELSEWHERE. SEAS 12 TO 17 FT.
THU
NW WINDS 10 TO 20 KT. SEAS 9 TO 14 FT, SUBSIDING TO 8 TO
11 FT IN THE AFTERNOON.
THU NIGHT
W OF 70W, W WINDS 10 TO 15 KT, SHIFTING TO SW 15 TO
25 KT AFTER MIDNIGHT. ELSEWHERE, W WINDS 10 TO 15 KT. SEAS 6 TO
9 FT.
FRI
W WINDS 15 TO 25 KT. SEAS 8 TO 11 FT.
FRI NIGHT
NW WINDS 15 TO 25 KT. SEAS 8 TO 13 FT.
SAT
N WINDS 10 TO 15 KT, SHIFTING TO SW IN THE AFTERNOON.
SEAS 8 TO 11 FT.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
SUN
W WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
SUN NIGHT
NW WINDS LESS THAN 10 KT, SHIFTING TO SE AFTER
MIDNIGHT. SEAS 3 TO 5 FT.
BAHAMAS N OF 22N
TODAY
N WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 4 TO 6 FT.
TONIGHT
N WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 6 TO 8 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
NW WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
FRI NIGHT
N WINDS 10 TO 15 KT, SHIFTING TO NE AFTER MIDNIGHT.
SEAS 3 TO 5 FT.
SAT
E WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
SAT NIGHT
E WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
SUN
E WINDS LESS THAN 10 KT. SEAS 3 FT.
SUN NIGHT
E WINDS 10 TO 15 KT. SEAS 3 FT.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
..GALE WARNING
TODAY
NW WINDS 15 TO 25 KT W OF 70W, AND W 20 TO 30 KT
ELSEWHERE. SEAS 13 TO 18 FT.
TONIGHT
NW WINDS 15 TO 25 KT W OF 70W, AND W 25 TO 35 KT
ELSEWHERE. SEAS 13 TO 18 FT.
THU
NW WINDS 10 TO 20 KT. SEAS 9 TO 14 FT W OF 70W, AND 11 TO
15 FT ELSEWHERE.
THU NIGHT
W WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
FRI
W WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
FRI NIGHT
NW WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
SAT
E WINDS LESS THAN 10 KT. SEAS 6 TO 8 FT.
SAT NIGHT
E WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
SUN
E WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
SUN NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
ATLC WATERS S OF 22N W OF 65W
TODAY
NW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
TONIGHT
NW WINDS 10 TO 20 KT. SEAS 7 TO 10 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. SEAS 4 TO 6 FT.
FRI NIGHT
NE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
SAT
E WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 3 TO 5 FT.
SAT NIGHT
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 20 KT. SEAS 4 TO 6 FT.
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W
TODAY
SW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
TONIGHT
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
SW WINDS 10 TO 15 KT, SHIFTING TO W AFTER MIDNIGHT.
SEAS 8 TO 11 FT.
FRI
S WINDS LESS THAN 10 KT. SEAS 7 TO 10 FT.
FRI NIGHT
VARIABLE WINDS LESS THAN 10 KT. SEAS 6 TO 8 FT.
SAT
E WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 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.
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