496
FZNT31 KNHC 172050
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
450 PM EDT SUN AUG 17 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
MAJOR HURRICANE ERIN IS NEAR 21.7N 68.5W AT
2100 UTC, MOVING WEST-NORTHWEST AT 11 KT. MAXIMUM SUSTAINED
WINDS REMAIN 110 KT WITH GUSTS TO 135 KT. MINIMUM CENTRAL
PRESSURE IS 946 MB. ERIN WILL MOVE MORE NW LATER TONIGHT AND
STRENGTHEN MODESTLY THROUGH MON AFTERNOON BEFORE BEGINNING A
SLOW WEAKENING TREND. ERIN IS EXPECTED TO REACH NEAR 22.8N 69.7W
TONIGHT, NEAR 24.0N 71.0W MON AFTERNOON, REACH NEAR 25.4N 71.9W
MON NIGHT THEN GRADUALLY TURN NORTHWARD AND EXIT THE REGION
THROUGH EARLY THU. FRESH TO LOCALLY STRONG S TO SW WINDS
OCCURRING OVER THE EXTREME NORTHEASTERN CARIBBEAN AND ATLANTIC
PASSAGES WILL GRADUALLY DIMINISH TO MODERATE TO FRESH S WINDS
THROUGH THE PASSAGES ON MON. LARGE NORTHERLY SWELL WILL ALSO
BLEED THROUGH THE PASSAGES AND INTO THE NE CARIBBEAN WATERS
THROUGH MON MORNING BEFORE FADING. EASTERLY TRADE WINDS ARE
EXPECTED TO RETURN TO EAST AND CENTRAL PORTIONS OF THE BASIN ON
WED AND INCREASE TO FRESH SPEEDS ACROSS MOST OF CENTRAL PORTIONS
WED NIGHT AND THU AS ATLANTIC HIGH PRESSURE BUILDS
WEST-SOUTHWESTWARD IN THE WAKE OF ERIN.
NW CARIBBEAN W OF 85W
TONIGHT
E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
MON
VARIABLE WINDS LESS THAN 10 KT, BECOMING NE LESS THAN
10 KT IN THE AFTERNOON. SEAS 2 FT OR LESS.
MON NIGHT
E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TUE
E WINDS LESS THAN 10 KT IN THE MORNING, BECOMING VARIABLE
WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TUE NIGHT
E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
WED
SE WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
WED NIGHT
E WINDS LESS THAN 10 KT, SHIFTING TO SE AFTER
MIDNIGHT. SEAS 2 FT OR LESS.
THU
SE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
THU NIGHT
SE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
FRI
SE WINDS 10 TO 15 KT. SEAS 3 FT.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
TONIGHT
N WINDS 10 TO 15 KT. SEAS 3 FT.
MON
N WINDS 10 TO 15 KT. SEAS 3 FT.
MON NIGHT
S OF 18N, NW WINDS LESS THAN 10 KT, SHIFTING TO SE
AFTER MIDNIGHT. ELSEWHERE, N WINDS 10 TO 15 KT. SEAS 2 FT OR
LESS.
TUE
S OF 18N, SE WINDS LESS THAN 10 KT. ELSEWHERE, NE WINDS
10 TO 15 KT, SHIFTING TO SW IN THE AFTERNOON. SEAS 2 FT OR LESS.
TUE NIGHT
S OF 18N, E WINDS LESS THAN 10 KT, INCREASING TO
10 TO 15 KT AFTER MIDNIGHT. ELSEWHERE, SW WINDS 10 TO 15 KT.
SEAS 2 FT OR LESS.
WED
SE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS, BUILDING TO 3 FT
IN THE AFTERNOON.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
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 4 TO 6 FT S OF 18N, AND 2 FT OR
LESS ELSEWHERE.
CARIBBEAN FROM 11N TO 15N W OF 72W
TONIGHT
NW WINDS 10 TO 15 KT, SHIFTING TO NE AFTER MIDNIGHT.
SEAS 3 FT.
MON
S WINDS LESS THAN 10 KT. SEAS 3 FT.
MON NIGHT
NW WINDS LESS THAN 10 KT, SHIFTING TO E AFTER
MIDNIGHT. SEAS 3 FT IN THE EVENING, SUBSIDING TO 2 FT OR LESS.
TUE
E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 3 FT IN THE EVENING,
SUBSIDING TO 2 FT OR LESS.
WED
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
THU
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SW CARIBBEAN S OF 11N
TONIGHT
W WINDS LESS THAN 10 KT. SEAS 3 FT IN THE EVENING,
SUBSIDING TO 2 FT OR LESS.
MON
SW WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS, BUILDING TO
3 FT IN THE AFTERNOON.
MON NIGHT
NW WINDS LESS THAN 10 KT IN THE EVENING, BECOMING
VARIABLE WINDS LESS THAN 10 KT. SEAS 3 FT IN THE EVENING,
SUBSIDING TO 2 FT OR LESS.
TUE
VARIABLE WINDS LESS THAN 10 KT, BECOMING E LESS THAN
10 KT IN THE AFTERNOON. SEAS 2 FT OR LESS.
TUE NIGHT
NE WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. SEAS 2 FT OR LESS, BUILDING TO 3 FT AFTER
MIDNIGHT.
WED
NE WINDS LESS THAN 10 KT. SEAS 3 FT IN THE MORNING,
SUBSIDING TO 2 FT OR LESS.
WED NIGHT
N WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
THU
N WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT IN
THE AFTERNOON. SEAS 3 TO 5 FT.
THU NIGHT
NW WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
FRI
W WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
CARIBBEAN BETWEEN 64W AND 72W
TONIGHT
N WINDS LESS THAN 10 KT GULF OF VENEZUELA, AND S
15 TO 25 KT ELSEWHERE. SEAS 2 FT OR LESS GULF OF VENEZUELA, AND
3 TO 5 FT ELSEWHERE.
MON
GULF OF VENEZUELA, VARIABLE WINDS LESS THAN 10 KT,
BECOMING N LESS THAN 10 KT IN THE AFTERNOON. ELSEWHERE, S WINDS
10 TO 20 KT. SEAS 2 FT OR LESS GULF OF VENEZUELA, AND 3 TO 5 FT
ELSEWHERE.
MON NIGHT
SE WINDS 10 TO 20 KT. SEAS 2 FT OR LESS GULF OF
VENEZUELA, AND 3 TO 5 FT ELSEWHERE.
TUE
SE WINDS LESS THAN 10 KT GULF OF VENEZUELA, AND SE 10 TO
15 KT ELSEWHERE. SEAS 3 TO 4 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 2 FT OR LESS GULF OF
VENEZUELA, AND 3 TO 5 FT ELSEWHERE.
WED
E WINDS 10 TO 20 KT. SEAS 4 TO 5 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
FRI
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
TONIGHT
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
MON
SE WINDS 10 TO 20 KT. SEAS 4 TO 5 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
WED
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
WED NIGHT
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
THU
NE WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
FRI
SE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
OFFSHORE WINDWARD ISLANDS AND ADJACENT ATLC WATERS FROM 07N TO
15N W OF 55W
TONIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
MON
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
MON NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
WED
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
THU NIGHT
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
FRI
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS
SYNOPSIS
MAJOR HURRICANE ERIN IS NEAR 21.7N 68.5W AT
2100 UTC, MOVING WEST-NORTHWEST AT 11 KT. MAXIMUM SUSTAINED
WINDS REMAIN 110 KT WITH GUSTS TO 135 KT. MINIMUM CENTRAL
PRESSURE IS 946 MB. ERIN WILL MOVE MORE NW LATER TONIGHT AND
STRENGTHEN MODESTLY THROUGH MON AFTERNOON BEFORE BEGINNING A SLOW
WEAKENING TREND. ERIN IS EXPECTED TO REACH NEAR 22.8N 69.7W
TONIGHT, NEAR 24.0N 71.0W MON AFTERNOON, REACH NEAR 25.4N 71.9W
MON NIGHT, REACH NEAR 27.1N 72.5W TUE AFTERNOON, NEAR 29.0N 73.0W
TUE NIGHT, NEAR 31.2N 72.7W WED AFTERNOON, BEFORE EXITING THE
AREA. LARGE SWELL GENERATED BY ERIN WILL CONTINUE TO AFFECT THE
ATLANTIC WATERS SOUTH OF 30N BETWEEN 60W AND 76W TONIGHT,
INCLUDING THE NORTHERN LEEWARD ISLANDS AND THE BAHAMAS, AND SHIFT
NW TO THE REMAINDER OF THE BAHAMAS ON MON, AND REACH THE
COASTLINES OF FLORIDA AND THE SE U.S. EARLY TUE MORNING, THEN
CONTINUE ACROSS THE REGIONAL WATERS NORTH OF 24N THROUGH THU. THE
PRESSURE GRADIENT BETWEEN A RIDGE OVER THE EASTERN U.S. AND ERIN
WILL PROMOTE MODERATE TO FRESH N TO NE WINDS OFFSHORE NORTHERN
FLORIDA TO NEAR 76W FROM EARLY TUE THROUGH WED. IN THE WAKE OF
ERIN, HIGH PRESSURE WILL BUILD WEST-SOUTHWESTWARD ALONG 24N
THROUGH THU NIGHT.
ATLC WATERS FROM 27N TO 31N W OF 77W
TONIGHT
NE WINDS 10 KT. SEAS 3 TO 5 FT.
MON
NE WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT IN
THE AFTERNOON. SEAS 5 TO 7 FT.
MON NIGHT
NE WINDS 10 TO 15 KT. SEAS 8 TO 11 FT.
TUE
NE WINDS 10 TO 20 KT. SEAS 8 TO 13 FT.
TUE NIGHT
N WINDS 15 TO 25 KT. SEAS 11 TO 16 FT.
WED
N WINDS 15 TO 25 KT. SEAS 12 TO 17 FT.
WED NIGHT
NW WINDS 15 TO 25 KT. SEAS 12 TO 17 FT.
THU
NW WINDS 10 TO 20 KT. SEAS 9 TO 14 FT.
THU NIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT
AFTER MIDNIGHT. SEAS 8 TO 11 FT.
FRI
W WINDS LESS THAN 10 KT. SEAS 7 TO 9 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
..HURRICANE WARNING
TONIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
MON
TROPICAL STORM CONDITIONS POSSIBLE. E WINDS 15 TO 25 KT.
SEAS 8 TO 11 FT, BUILDING TO 9 TO 14 FT IN THE AFTERNOON.
MON NIGHT
TROPICAL STORM CONDITIONS EXPECTED. W OF 70W, NE
WINDS 25 TO 35 KT, INCREASING TO 35 TO 45 KT AFTER MIDNIGHT.
ELSEWHERE, SE WINDS 30 TO 40 KT. SEAS 10 TO 15 FT, BUILDING TO
13 TO 18 FT AFTER MIDNIGHT.
TUE
HURRICANE CONDITIONS EXPECTED. W OF 70W, NE WINDS 55 TO
65 KT, INCREASING TO 90 TO 110 KT IN THE AFTERNOON,SEAS 15 TO
25 FT, BUILDING TO 20 TO 30 FT IN THE AFTERNOON. ELSEWHERE, SE
WINDS 30 TO 40 KT, SEAS 14 TO 19 FT.
TUE NIGHT
HURRICANE CONDITIONS POSSIBLE. NE WINDS 90 TO
110 KT W OF 70W, AND SE 30 TO 40 KT ELSEWHERE. SEAS 26 TO 36 FT
W OF 70W, AND 15 TO 20 FT ELSEWHERE.
WED
HURRICANE CONDITIONS POSSIBLE.
WED NIGHT
HURRICANE CONDITIONS POSSIBLE.
THU
TROPICAL STORM CONDITIONS POSSIBLE.
THU NIGHT
W WINDS 15 TO 25 KT W OF 70W, AND SW 20 TO 30 KT
ELSEWHERE. SEAS 11 TO 16 FT.
FRI
W WINDS 10 TO 15 KT W OF 70W, AND W 15 TO 25 KT
ELSEWHERE. SEAS 8 TO 12 FT W OF 70W, AND 10 TO 15 FT ELSEWHERE.
BAHAMAS N OF 22N
TONIGHT
NE WINDS 15 TO 25 KT. SEAS 4 TO 6 FT.
MON
TROPICAL STORM CONDITIONS POSSIBLE. N WINDS 20 TO 30 KT.
SEAS 6 TO 9 FT.
MON NIGHT
TROPICAL STORM CONDITIONS POSSIBLE. N WINDS 20 TO
30 KT. SEAS 6 TO 9 FT.
TUE
NW WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
TUE NIGHT
W WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
WED
W WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
WED NIGHT
SW WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
THU
SW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
THU NIGHT
W WINDS 10 TO 15 KT, SHIFTING TO SW AFTER MIDNIGHT.
SEAS 3 TO 5 FT.
FRI
SW WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
..HURRICANE WARNING
TONIGHT
HURRICANE CONDITIONS. W OF 70W, NE WINDS 30 TO
40 KT, INCREASING TO 55 TO 65 KT AFTER MIDNIGHT,SEAS 9 TO 14 FT,
BUILDING TO 13 TO 18 FT AFTER MIDNIGHT. ELSEWHERE, SE WINDS
90 TO 110 KT, SEAS 17 TO 22 FT, BUILDING TO 16 TO 26 FT AFTER
MIDNIGHT.
MON
HURRICANE CONDITIONS EXPECTED. W OF 70W, NE WINDS 100 TO
120 KT, SEAS 17 TO 22 FT, BUILDING TO 18 TO 28 FT IN THE
AFTERNOON. ELSEWHERE, SE WINDS 85 TO 105 KT, DIMINISHING TO
55 TO 65 KT IN THE AFTERNOON,SEAS 16 TO 26 FT, SUBSIDING TO
17 TO 22 FT IN THE AFTERNOON.
MON NIGHT
HURRICANE CONDITIONS EXPECTED. N WINDS 95 TO
115 KT W OF 70W, AND SE 40 TO 50 KT ELSEWHERE. SEAS 22 TO 32 FT
W OF 70W, AND 16 TO 21 FT ELSEWHERE.
TUE
HURRICANE CONDITIONS EXPECTED. W WINDS 95 TO 115 KT W OF
70W, AND S 35 TO 45 KT ELSEWHERE. SEAS 23 TO 33 FT W OF 70W, AND
13 TO 18 FT ELSEWHERE.
TUE NIGHT
HURRICANE CONDITIONS POSSIBLE. W OF 70W, SW WINDS
65 TO 75 KT, DIMINISHING TO 35 TO 45 KT AFTER MIDNIGHT,SEAS
17 TO 27 FT, SUBSIDING TO 14 TO 19 FT AFTER MIDNIGHT. ELSEWHERE,
S WINDS 30 TO 40 KT, DIMINISHING TO 20 TO 30 KT AFTER
MIDNIGHT,SEAS 11 TO 16 FT.
WED
TROPICAL STORM CONDITIONS POSSIBLE.
WED NIGHT
S WINDS 20 TO 30 KT. SEAS 9 TO 14 FT W OF 70W, AND
8 TO 11 FT ELSEWHERE.
THU
SW WINDS 10 TO 20 KT W OF 70W, AND S 15 TO 25 KT
ELSEWHERE. SEAS 8 TO 11 FT.
THU NIGHT
S WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
FRI
S WINDS 10 TO 15 KT. SEAS 6 TO 8 FT.
ATLC WATERS S OF 22N W OF 65W
..HURRICANE WARNING
TONIGHT
HURRICANE CONDITIONS. W WINDS 90 TO 100 KT, BECOMING
SW 50 TO 60 KT AFTER MIDNIGHT. SEAS 12 TO 17 FT.
MON
TROPICAL STORM CONDITIONS EXPECTED. SW WINDS 30 TO
40 KT. SEAS 10 TO 15 FT.
MON NIGHT
SW WINDS 20 TO 30 KT. SEAS 8 TO 13 FT, SUBSIDING TO
7 TO 10 FT AFTER MIDNIGHT.
TUE
S WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
TUE NIGHT
S WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
WED
S WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
WED NIGHT
SE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
THU
SE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
THU NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W
..TROPICAL STORM WARNING
TONIGHT
SE WINDS 20 TO 30 KT. SEAS 7 TO 10 FT.
MON
SE WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
MON NIGHT
SE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
TUE
SE WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 6 FT.
WED
E WINDS 10 TO 20 KT. SEAS 6 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 7 FT.
THU
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 7 TO 9 FT.
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