685
FZNT31 KNHC 200904
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
504 AM EDT WED AUG 20 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
THE PRESSURE GRADIENT WILL BEGIN TO INCREASE ACROSS
MOST OF THE CARIBBEAN AND TROPICAL N ATLANTIC AS HURRICANE ERIN
CONTINUES TO PULL FARTHER AWAY FROM THE REGION, AND AT THE SAME
TIME CENTRAL ATLANTIC HIGH PRESSURE BUILDS WEST-SOUTHWESTWARD
TOWARD THE BAHAMAS. AS A RESULT, TRADES ARE EXPECTED TO INCREASE
TO FRESH TO STRONG SPEEDS ACROSS THE SOUTH-CENTRAL CARIBBEAN
BEGINNING THIS AFTERNOON AND CONTINUE THROUGH FRI. MEANWHILE, A
TROPICAL WAVE LOCATED OVER THE CENTRAL TROPICAL ATLANTIC
CONTINUES TO PRODUCE A BROAD AREA OF DISORGANIZED SHOWERS AND
THUNDERSTORMS. ENVIRONMENTAL CONDITIONS APPEAR CONDUCIVE FOR
GRADUAL DEVELOPMENT OF THIS SYSTEM, AND A TROPICAL DEPRESSION
COULD FORM LATE THIS WEEK OR OVER THE WEEKEND WHILE IT MOVES
NEAR OR TO THE NORTH OF THE NORTHERN LEEWARD ISLANDS.
NW CARIBBEAN W OF 85W
TODAY
SE WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
THU
SE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 2 FT OR LESS, BUILDING TO
3 FT AFTER MIDNIGHT.
FRI
SE WINDS 10 TO 20 KT. SEAS 3 FT.
FRI NIGHT
E WINDS 15 TO 25 KT. SEAS 3 TO 5 FT.
SAT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
TODAY
SE WINDS 10 TO 20 KT. SEAS 2 FT OR LESS.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 2 FT OR LESS, BUILDING TO
3 FT AFTER MIDNIGHT.
THU
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT S OF 18N, AND 2 FT OR
LESS ELSEWHERE.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT S OF 18N, AND
2 FT OR LESS ELSEWHERE.
FRI
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT S OF 18N, AND 2 FT OR
LESS ELSEWHERE.
FRI NIGHT
E WINDS 10 TO 20 KT S OF 18N, AND E 15 TO 25 KT
ELSEWHERE. S OF 18N, SEAS 3 TO 5 FT. ELSEWHERE, SEAS 2 FT OR
LESS, BUILDING TO 3 FT AFTER MIDNIGHT.
SAT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. S OF 18N, SEAS 3 TO 5 FT.
ELSEWHERE, SEAS 2 TO 3 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT S OF 18N, AND
2 TO 3 FT ELSEWHERE.
CARIBBEAN FROM 11N TO 15N W OF 72W
TODAY
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
TONIGHT
NE WINDS 15 TO 25 KT. SEAS 5 TO 7 FT WITHIN 90 NM OF
COAST OF COLOMBIA, AND 3 TO 5 FT ELSEWHERE.
THU
E WINDS 15 TO 25 KT. SEAS 6 TO 8 FT WITHIN 90 NM OF COAST
OF COLOMBIA, AND 4 TO 6 FT ELSEWHERE.
THU NIGHT
E WINDS 15 TO 25 KT. SEAS 6 TO 8 FT WITHIN 90 NM OF
COAST OF COLOMBIA, AND 4 TO 6 FT ELSEWHERE.
FRI
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
FRI NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SAT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
SW CARIBBEAN S OF 11N
TODAY
NE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
TONIGHT
N WINDS 10 TO 20 KT. SEAS 3 FT.
THU
N WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
THU NIGHT
NW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT
S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SUN
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
CARIBBEAN BETWEEN 64W AND 72W
TODAY
E WINDS 10 TO 20 KT GULF OF VENEZUELA, AND E 15 TO
25 KT ELSEWHERE. SEAS 3 TO 5 FT.
TONIGHT
E WINDS 20 TO 30 KT GULF OF VENEZUELA, AND E 15 TO
25 KT ELSEWHERE. SEAS 4 TO 6 FT.
THU
GULF OF VENEZUELA, E WINDS 20 TO 25 KT, BECOMING NE 10 TO
20 KT IN THE AFTERNOON. ELSEWHERE, E WINDS 15 TO 25 KT. SEAS 4
TO 6 FT.
THU NIGHT
E WINDS 15 TO 25 KT. SEAS 4 TO 6 FT.
FRI
NE WINDS 15 TO 25 KT GULF OF VENEZUELA, AND E 10 TO 20 KT
ELSEWHERE. SEAS 4 TO 6 FT.
FRI NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
SAT
SE WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
SUN
E WINDS 10 TO 20 KT GULF OF VENEZUELA, AND E 15 TO 25 KT
ELSEWHERE. GULF OF VENEZUELA, SEAS 3 FT IN THE MORNING,
SUBSIDING TO 2 FT OR LESS. ELSEWHERE, SEAS 4 TO 6 FT.
OFFSHORE LEEWARD ISLANDS AND ADJACENT ATLC WATERS FROM 15N TO
19N W OF 55W
TODAY
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
FRI
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
FRI NIGHT
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SAT
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
SUN
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 20 KT. SEAS 3 TO 5 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
THU
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
THU NIGHT
SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
FRI
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
FRI NIGHT
SE 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 4 TO 6 FT.
SUN
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS
SYNOPSIS
HURRICANE ERIN IS CENTERED NEAR 28.9N 73.3W, OR
ABOUT 480 NM WEST-SOUTHWEST OF BERMUDA AT 5 AM EDT, AND IS
MOVING NORTH-NORTHWEST AT 11 KT. MAXIMUM SUSTAINED WINDS ARE 85
KT WITH GUSTS TO 105 KT, AND THE MINIMUM CENTRAL PRESSURE IS 954
MB. ERIN WILL STRENGTHEN SLIGHTLY AS IT MOVES TO NEAR 30.6N 73.5W
THIS AFTERNOON, TO NORTH OF THE AREA NEAR 33.0N 72.8W LATE
TONIGHT AND WELL NORTH-NORTHEAST OF THE REGION THROUGH AS IT
BEGINS TO SLOWLY WEAKEN AND EVENTUALLY BECOMING POST- TROPICAL.
SWELLS GENERATED BY ERIN WILL AFFECT THE BAHAMAS, BERMUDA AND THE
EAST COAST OF THE UNITED STATES DURING THE NEXT SEVERAL DAYS.
OTHERWISE, A TROPICAL WAVE LOCATED OVER THE CENTRAL TROPICAL
ATLANTIC CONTINUES TO PRODUCE A BROAD AREA OF DISORGANIZED
SHOWERS AND THUNDERSTORMS. ENVIRONMENTAL CONDITIONS APPEAR
CONDUCIVE FOR GRADUAL DEVELOPMENT OF THIS SYSTEM, AND A TROPICAL
DEPRESSION COULD FORM LATE THIS WEEK OR OVER THE WEEKEND WHILE IT
MOVES NEAR OR TO THE NORTH OF THE NORTHERN LEEWARD ISLANDS.
ATLC WATERS FROM 27N TO 31N W OF 77W
TODAY
N WINDS 20 TO 30 KT. SEAS 12 TO 17 FT.
TONIGHT
NW WINDS 20 TO 30 KT. SEAS 11 TO 16 FT.
THU
NW WINDS 15 TO 25 KT. SEAS 8 TO 13 FT.
THU NIGHT
W WINDS 10 TO 15 KT. SEAS 7 TO 10 FT.
FRI
W WINDS LESS THAN 10 KT. SEAS 6 TO 9 FT.
FRI NIGHT
SE WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
SAT
S WINDS LESS THAN 10 KT. SEAS 6 TO 8 FT.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
SUN
W WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
..HURRICANE WARNING
TODAY
HURRICANE CONDITIONS. SW WINDS 75 TO 90 KT W OF 70W,
AND S 30 TO 40 KT ELSEWHERE. SEAS 22 TO 32 FT W OF 70W, AND
12 TO 17 FT ELSEWHERE.
TONIGHT
HURRICANE CONDITIONS EXPECTED. W OF 70W, SW WINDS
70 TO 90 KT, DIMINISHING TO 45 TO 55 KT LATE. SEAS 18 TO 28 FT,
SUBSIDING TO 15 TO 25 FT LATE. ELSEWHERE, S WINDS 30 TO 40 KT,
SEAS 11 TO 16 FT.
THU
TROPICAL STORM CONDITIONS EXPECTED. W OF 70W, W WINDS
30 TO 40 KT, DIMINISHING TO 20 TO 30 KT IN THE AFTERNOON,SEAS
13 TO 18 FT, SUBSIDING TO 10 TO 15 FT IN THE AFTERNOON.
ELSEWHERE, S WINDS 25 TO 35 KT, SEAS 10 TO 15 FT.
THU NIGHT
SW WINDS 20 TO 30 KT. SEAS 9 TO 14 FT.
FRI
NW WINDS 10 TO 20 KT W OF 70W, AND SW 20 TO 30 KT
ELSEWHERE. SEAS 9 TO 14 FT.
FRI NIGHT
W OF 70W, N TO NE WINDS 10 TO 15 KT. ELSEWHERE, W
WINDS 10 TO 20 KT. SEAS 8 TO 13 FT.
SAT
SE WINDS LESS THAN 10 KT. SEAS 8 TO 12 FT.
SAT NIGHT
SW WINDS LESS THAN 10 KT. SEAS 8 TO 11 FT.
SUN
SW WINDS 10 TO 15 KT W OF 70W, AND SW LESS THAN 10 KT
ELSEWHERE. SEAS 7 TO 10 FT.
BAHAMAS N OF 22N
TODAY
W WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
TONIGHT
SW WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU
SW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
THU NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
SW WINDS 10 TO 15 KT, SHIFTING TO NW IN THE AFTERNOON.
SEAS 3 TO 5 FT.
FRI NIGHT
NE TO E WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
SAT
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
SAT NIGHT
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
SUN
SE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
..TROPICAL STORM WARNING
TODAY
TROPICAL STORM CONDITIONS EXPECTED. W OF 70W, SW WINDS
30 TO 40 KT, DIMINISHING TO 20 TO 30 KT IN THE AFTERNOON.
ELSEWHERE, S WINDS 20 TO 30 KT. SEAS 10 TO 15 FT W OF 70W, AND
8 TO 11 FT ELSEWHERE.
TONIGHT
W OF 70W, SW WINDS 20 TO 30 KT. ELSEWHERE, S WINDS
20 TO 30 KT, DIMINISHING TO 10 TO 20 KT LATE. SEAS 7 TO 10 FT.
THU
SW WINDS 15 TO 25 KT W OF 70W, AND S 15 TO 25 KT
ELSEWHERE. SEAS 6 TO 9 FT.
THU NIGHT
S WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
FRI
S WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
FRI NIGHT
W OF 70W, SW WINDS 10 TO 15 KT, SHIFTING TO SE
AFTER MIDNIGHT. ELSEWHERE, E WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
SAT
S WINDS LESS THAN 10 KT W OF 70W, AND E 10 TO 20 KT
ELSEWHERE. SEAS 6 TO 9 FT.
SAT NIGHT
W OF 70W, S WINDS LESS THAN 10 KT. ELSEWHERE, NE
WINDS 10 TO 20 KT, DIMINISHING TO LESS THAN 10 KT LATE.
SEAS 7 TO 9 FT.
SUN
S WINDS LESS THAN 10 KT. SEAS 7 TO 9 FT.
ATLC WATERS S OF 22N W OF 65W
TODAY
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
THU
SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
FRI NIGHT
NE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
SAT
NE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
SAT NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SUN
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 4 TO 6 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 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.
FRI
E WINDS 15 TO 25 KT. SEAS 6 TO 8 FT.
FRI NIGHT
SE WINDS 15 TO 25 KT. SEAS 7 TO 10 FT, SUBSIDING TO
6 TO 7 FT LATE.
SAT
SE WINDS 15 TO 25 KT. SEAS 6 TO 7 FT.
SAT NIGHT
SE WINDS 15 TO 25 KT, DIMINISHING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 6 TO 7 FT.
SUN
E WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
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