427
FZNT31 KNHC 120306
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
1006 PM EST THU DEC 11 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
WIDESPREAD FRESH TRADE WINDS ARE EXPECTED OVER THE
CENTRAL AND EASTERN CARIBBEAN THROUGH SUN MORNING AS A MODERATE
PRESSURE GRADIENT PREVAILS BETWEEN THE COLOMBIAN LOW AND
MIGRATING HIGH PRESSURE TO THE NORTH ALONG 29N. STRONG E WINDS
WILL PULSE TO NEAR GALE-FORCE AT NIGHT OFFSHORE OF NORTHERN
COLOMBIA. ELSEWHERE, FRESH TO LOCALLY STRONG TRADE WINDS AND
ROUGH SEAS IN LARGE E SWELL WILL PREVAIL OVER THE ATLANTIC
WATERS AND THROUGH THE PASSAGES INTO THE EASTERN BASIN THROUGH
THIS WEEKEND. LOOKING AHEAD, A COLD FRONT WILL APPROACH THE
NORTHWESTERN CARIBBEAN ON MON, ACCOMPANIED BY INCREASING WINDS
AND BUILDING SEAS BEHIND THE FRONT. THIS FRONT MAY REACH FROM
CENTRAL CUBA TO BELIZE TUE MORNING AND BEGIN TO STALL.
NW CARIBBEAN W OF 85W
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT
E WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 3 TO 5 FT.
SAT NIGHT
E WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT
AFTER MIDNIGHT. SEAS 3 TO 5 FT.
SUN
NE WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
SUN NIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
MON
NE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
MON NIGHT
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
TUE
NE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TUE NIGHT
NE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
TONIGHT
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT S OF 18N, AND
3 TO 4 FT ELSEWHERE.
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 S OF 18N, AND 3 TO
5 FT ELSEWHERE.
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
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
MON
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
MON NIGHT
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
CARIBBEAN FROM 11N TO 15N W OF 72W
TONIGHT
E WINDS 20 TO 25 KT WITHIN 90 NM OF COAST OF
COLOMBIA, AND NE 15 TO 25 KT ELSEWHERE. SEAS 7 TO 10 FT.
FRI
E WINDS 15 TO 25 KT. SEAS 7 TO 10 FT.
FRI NIGHT
E WINDS 20 TO 25 KT WITHIN 90 NM OF COAST OF
COLOMBIA, AND NE 15 TO 25 KT ELSEWHERE. SEAS 6 TO 9 FT.
SAT
E WINDS 15 TO 25 KT. SEAS 7 TO 10 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
SUN NIGHT
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
MON
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
MON NIGHT
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
TUE
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
TUE NIGHT
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
SW CARIBBEAN S OF 11N
TONIGHT
NE WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
FRI
NE WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
FRI NIGHT
NE WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
SAT
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
SAT NIGHT
N WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
SUN
N WINDS LESS THAN 10 KT. SEAS 6 TO 8 FT.
SUN NIGHT
N WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
MON
NE WINDS 10 TO 15 KT, SHIFTING TO N IN THE AFTERNOON.
SEAS 4 TO 6 FT.
MON NIGHT
N WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 4 TO 6 FT.
TUE
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE NIGHT
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
CARIBBEAN BETWEEN 64W AND 72W
TONIGHT
E WINDS 20 TO 25 KT GULF OF VENEZUELA, AND E 10 TO
20 KT ELSEWHERE. SEAS 5 TO 7 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
FRI NIGHT
E WINDS 15 TO 25 KT GULF OF VENEZUELA, AND E 10 TO
20 KT ELSEWHERE. SEAS 4 TO 6 FT GULF OF VENEZUELA, AND 6 TO 8 FT
ELSEWHERE.
SAT
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.
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.
MON
E WINDS 10 TO 15 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.
OFFSHORE LEEWARD ISLANDS AND ADJACENT ATLC WATERS FROM 15N TO
19N W OF 55W
TONIGHT
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 8 TO 11 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.
SUN NIGHT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
MON
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
OFFSHORE WINDWARD ISLANDS AND ADJACENT ATLC WATERS FROM 07N TO
15N W OF 55W
TONIGHT
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 8 TO 11 FT.
SAT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.
SUN NIGHT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
MON
E WINDS 10 TO 15 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 6 TO 9 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS
SYNOPSIS
A COMPLEX STORM SYSTEM CENTERED OVER THE CANADIAN
MARITIMES EXTENDS TWO COLD FRONTS THROUGH THE NORTHWESTERN
TROPICAL ATLANTIC AND THROUGH THE BAHAMAS. THESE COLD FRONTS
WILL RAPIDLY PROGRESS EASTWARD AND MERGE ACROSS THE CENTRAL
ATLANTIC THROUGH FRI. WIDESPREAD STRONG TO LOCALLY NEAR GALE-
FORCE SW WINDS WILL OCCUR AHEAD OF THE LEADING FRONT, GENERALLY
NORTH OF 28N AND EAST OF 70W, INTO FRI AFTERNOON. WEST OF THE
COLD FRONTS, FRESH TO LOCALLY STRONG W TO NW WINDS ARE
ANTICIPATED, NORTH OF 28N FROM OFFSHORE OF FLORIDA TO 70W THROUGH
LATE TONIGHT. ROUGH SEAS IN SW SWELL AND THEN NW SWELL ARE
EXPECTED NORTH OF 27N, WITH SEAS SLOWLY SUBSIDING FROM WEST TO
EAST INTO THIS WEEKEND. ELSEWHERE IN THE CENTRAL ATLANTIC, ROUGH
SEAS IN MIXED N AND SE SWELL WILL PREVAIL THROUGH FRI MORNING,
WITH A NEW MIXED SWELL REINFORCING ROUGH SEAS THIS WEEKEND.
LOOKING AHEAD, THE NEXT COLD FRONT IS SLATED TO PUSH OFF THE
COAST OF THE SOUTHEASTERN UNITED STATES ON SUN, WITH INCREASING
WINDS AND BUILDING SEAS EXPECTED BEHIND THE FRONT.
ATLC WATERS FROM 27N TO 31N W OF 77W
TONIGHT
NW WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
FRI
N WINDS LESS THAN 10 KT IN THE MORNING, BECOMING VARIABLE
WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
FRI NIGHT
S WINDS LESS THAN 10 KT. SEAS 3 FT.
SAT
SE WINDS LESS THAN 10 KT. SEAS 3 FT.
SAT NIGHT
S WINDS LESS THAN 10 KT. SEAS 3 FT.
SUN
NW WINDS LESS THAN 10 KT, INCREASING TO 10 TO 20 KT IN
THE AFTERNOON. SEAS 3 TO 4 FT.
SUN NIGHT
N WINDS 15 TO 25 KT. SEAS 5 TO 7 FT, BUILDING TO
8 TO 11 FT AFTER MIDNIGHT.
MON
NE WINDS 15 TO 25 KT. SEAS 11 TO 13 FT.
MON NIGHT
NE WINDS 10 TO 15 KT. SEAS 8 TO 11 FT.
TUE
NE WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
TONIGHT
NW WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.
FRI
W OF 70W, N WINDS 10 KT IN THE MORNING, BECOMING VARIABLE
WINDS LESS THAN 10 KT. ELSEWHERE, NW WINDS 10 TO 15 KT. SEAS
6 TO 9 FT.
FRI NIGHT
E WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT W OF 70W,
AND 6 TO 9 FT ELSEWHERE.
SAT
W OF 70W, E WINDS LESS THAN 10 KT. ELSEWHERE, E WINDS
LESS THAN 10 KT, INCREASING TO 10 TO 15 KT IN THE AFTERNOON.
SEAS 5 TO 7 FT.
SAT NIGHT
E WINDS 10 TO 15 KT, SHIFTING TO SE AFTER MIDNIGHT.
SEAS 5 TO 7 FT.
SUN
S WINDS LESS THAN 10 KT, SHIFTING TO SW IN THE AFTERNOON.
SEAS 4 TO 6 FT.
SUN NIGHT
W WINDS 10 TO 20 KT, BECOMING NW 20 TO 30 KT AFTER
MIDNIGHT. SEAS 5 TO 7 FT, BUILDING TO 8 TO 11 FT AFTER MIDNIGHT.
MON
N WINDS 15 TO 25 KT. SEAS 8 TO 13 FT, BUILDING TO 11 TO
16 FT IN THE AFTERNOON.
MON NIGHT
N WINDS 10 TO 15 KT. SEAS 10 TO 15 FT.
TUE
NE WINDS 10 TO 15 KT. SEAS 8 TO 13 FT.
TUE NIGHT
NE WINDS 10 TO 15 KT. SEAS 7 TO 10 FT.
BAHAMAS N OF 22N
TONIGHT
N WINDS 10 TO 15 KT. 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.
SUN
SE WINDS LESS THAN 10 KT, SHIFTING TO NW IN THE
AFTERNOON. SEAS 3 TO 4 FT.
SUN NIGHT
N WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 3 TO 4 FT.
MON
NE WINDS 15 TO 25 KT. SEAS 4 TO 6 FT.
MON NIGHT
NE WINDS 10 TO 20 KT. SEAS 6 TO 9 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.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
TONIGHT
SW WINDS 10 TO 15 KT, SHIFTING TO W AFTER MIDNIGHT.
SEAS 5 TO 7 FT.
FRI
W OF 70W, NE WINDS 10 TO 15 KT. ELSEWHERE, S WINDS LESS
THAN 10 KT, SHIFTING TO E IN THE AFTERNOON. SEAS 5 TO 7 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
SE WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
SUN
S WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
MON
N WINDS 15 TO 25 KT. SEAS 6 TO 8 FT, BUILDING TO 8 TO
11 FT IN THE AFTERNOON.
MON NIGHT
NE WINDS 10 TO 20 KT. SEAS 8 TO 11 FT.
TUE
NE WINDS 10 TO 20 KT. SEAS 8 TO 13 FT.
TUE NIGHT
NE WINDS 10 TO 20 KT. SEAS 9 TO 12 FT.
ATLC WATERS S OF 22N W OF 65W
TONIGHT
E WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. 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 6 TO 9 FT.
SUN
SE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
SUN NIGHT
SE WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN
10 KT AFTER MIDNIGHT. SEAS 5 TO 7 FT.
MON
E WINDS LESS THAN 10 KT. SEAS 5 TO 7 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE
E WINDS LESS THAN 10 KT. SEAS 4 TO 6 FT, BUILDING TO 6 TO
9 FT IN THE AFTERNOON.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W
TONIGHT
E WINDS 10 TO 20 KT. SEAS 8 TO 11 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 15 TO 20 KT. SEAS 9 TO 11 FT.
SUN
E WINDS 15 TO 20 KT. SEAS 9 TO 11 FT.
SUN NIGHT
SE WINDS 10 TO 20 KT. SEAS 9 TO 10 FT.
MON
SE WINDS 10 TO 15 KT. SEAS 8 TO 10 FT.
MON NIGHT
SE WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 7 TO 9 FT.
TUE
SE WINDS 10 TO 15 KT. SEAS 7 TO 9 FT.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 7 TO 10 FT.
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