789
FZNT31 KNHC 180920
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
520 AM EDT MON AUG 18 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 22.8N 70.2W AT 5 AM
EDT, AND IS MOVING NORTHWEST AT 11 KT. MAXIMUM SUSTAINED WINDS
ARE 115 KT WITH GUSTS TO 140 KT, AND THE MINIMUM CENTRAL
PRESSURE IS 945 MB. ERIN WILL MOVE TO 23.6N 71.2W THIS
AFTERNOON, 25.0N 72.2W TUE MORNING, 26.6N 72.9W TUE AFTERNOON,
28.6N 73.4W WED MORNING, 30.7N 73.4W WED AFTERNOON, AND 32.9N
72.2W THU MORNING. ERIN WILL CHANGE LITTLE IN INTENSITY AS IT
MOVES NEAR 37.2N 66.1W EARLY FRI. FRESH S TO SW WINDS OCCURRING
OVER THE NE AND N-CENTRAL CARIBBEAN AS WELL AS THE ATLANTIC
PASSAGES WILL GRADUALLY DIMINISH TO MODERATE TO FRESH S WINDS
TODAY. LARGE NORTHERLY SWELL WILL ALSO BLEED THROUGH THE MONA
PASSAGE THROUGH THIS MORNING BEFORE SUBSIDING. 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
TODAY
VARIABLE WINDS LESS THAN 10 KT, BECOMING N LESS THAN
10 KT IN THE AFTERNOON. SEAS 2 FT OR LESS.
TONIGHT
E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TUE
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 2 FT OR LESS.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
TODAY
N WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
TONIGHT
S OF 18N, NW WINDS LESS THAN 10 KT, SHIFTING TO SE
AFTER MIDNIGHT. ELSEWHERE, N WINDS 10 TO 20 KT. SEAS 2 FT OR
LESS.
TUE
S OF 18N, SE WINDS LESS THAN 10 KT. ELSEWHERE, NE WINDS
10 TO 20 KT, SHIFTING TO W 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.
WED NIGHT
SE WINDS 10 TO 20 KT. S OF 18N, SEAS 2 FT OR LESS,
BUILDING TO 3 TO 4 FT AFTER MIDNIGHT. ELSEWHERE, SEAS 2 FT OR
LESS.
THU
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT S OF 18N, AND 2 FT OR
LESS ELSEWHERE.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 4 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.
CARIBBEAN FROM 11N TO 15N W OF 72W
TODAY
SW WINDS LESS THAN 10 KT. SEAS 3 FT IN THE MORNING,
SUBSIDING TO 2 FT OR LESS.
TONIGHT
E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TUE
E WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 2 FT OR LESS.
WED
E WINDS 10 TO 20 KT. SEAS 3 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT WITHIN 90 NM OF
COAST OF COLOMBIA, AND 3 TO 4 FT ELSEWHERE.
THU
E WINDS 10 TO 20 KT. SEAS 5 TO 7 FT WITHIN 90 NM OF COAST
OF COLOMBIA, AND 3 TO 5 FT ELSEWHERE.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
SW CARIBBEAN S OF 11N
TODAY
SW WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TONIGHT
NE WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TUE
E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TUE NIGHT
NE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
WED
NE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
WED NIGHT
NE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
THU
NE WINDS 10 TO 15 KT, SHIFTING TO NW IN THE AFTERNOON.
SEAS 3 FT.
THU NIGHT
NW WINDS LESS THAN 10 KT. SEAS 3 FT.
FRI
W WINDS LESS THAN 10 KT. SEAS 3 TO 4 FT.
CARIBBEAN BETWEEN 64W AND 72W
TODAY
VARIABLE 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.
TONIGHT
NE WINDS LESS THAN 10 KT GULF OF VENEZUELA, AND SE
10 TO 20 KT ELSEWHERE. SEAS 2 FT OR LESS GULF OF VENEZUELA, AND
3 TO 5 FT ELSEWHERE.
TUE
GULF OF VENEZUELA, VARIABLE WINDS LESS THAN 10 KT,
BECOMING S LESS THAN 10 KT IN THE AFTERNOON. ELSEWHERE, SE WINDS
10 TO 20 KT. SEAS 2 FT OR LESS GULF OF VENEZUELA, AND 3 TO 4 FT
ELSEWHERE.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 2 FT OR LESS GULF OF
VENEZUELA, AND 3 TO 4 FT ELSEWHERE.
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 3 TO 5 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
OFFSHORE LEEWARD ISLANDS AND ADJACENT ATLC WATERS FROM 15N TO
19N W OF 55W
TODAY
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TONIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TUE
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
WED
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
WED NIGHT
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
THU
NE WINDS 10 TO 20 KT. SEAS 5 TO 7 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
TODAY
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
TONIGHT
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 3 TO 5 FT.
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 15 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 3 TO 5 FT.
SYNOPSIS FOR THE THE SW N ATLANTIC INCLUDING THE BAHAMAS
SYNOPSIS
MAJOR HURRICANE ERIN IS NEAR 22.8N 70.2W AT 5 AM
EDT, AND IS MOVING NORTHWEST AT 11 KT. MAXIMUM SUSTAINED WINDS
ARE 115 KT WITH GUSTS TO 140 KT, AND THE MINIMUM CENTRAL PRESSURE
IS 945 MB. ERIN WILL MOVE TO 23.6N 71.2W THIS AFTERNOON, 25.0N
72.2W TUE MORNING, 26.6N 72.9W TUE AFTERNOON, 28.6N 73.4W WED
MORNING, 30.7N 73.4W WED AFTERNOON, AND 32.9N 72.2W THU MORNING.
ERIN WILL CHANGE LITTLE IN INTENSITY AS IT MOVES NEAR 37.2N 66.1W
EARLY FRI. SWELLS GENERATED BY ERIN WILL AFFECT THE BAHAMAS,
BERMUDA, THE EAST COAST OF THE UNITED STATES, AND ATLANTIC CANADA
DURING THE NEXT SEVERAL DAYS. THESE ROUGH OCEAN CONDITIONS WILL
LIKELY CAUSE LIFE- THREATENING SURF AND RIP CURRENTS. 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
TODAY
NE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 7 TO 10 FT.
TUE
NE WINDS 10 TO 20 KT. SEAS 9 TO 14 FT.
TUE NIGHT
N WINDS 20 TO 30 KT. SEAS 13 TO 18 FT.
WED
NW WINDS 20 TO 30 KT. SEAS 13 TO 18 FT.
WED NIGHT
NW WINDS 20 TO 30 KT. SEAS 12 TO 17 FT.
THU
NW WINDS 10 TO 20 KT. SEAS 10 TO 15 FT.
THU NIGHT
NW WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN
10 KT AFTER MIDNIGHT. SEAS 8 TO 12 FT.
FRI
NE WINDS LESS THAN 10 KT. SEAS 7 TO 10 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
..HURRICANE WARNING
TODAY
TROPICAL STORM CONDITIONS POSSIBLE. E WINDS 20 TO
30 KT. W OF 70W, SEAS 7 TO 10 FT, BUILDING TO 9 TO 14 FT IN THE
AFTERNOON. ELSEWHERE, SEAS 9 TO 14 FT.
TONIGHT
TROPICAL STORM CONDITIONS EXPECTED. E WINDS 30 TO
40 KT W OF 70W, AND SE 25 TO 35 KT ELSEWHERE. W OF 70W, SEAS
11 TO 16 FT, BUILDING TO 15 TO 20 FT AFTER MIDNIGHT. ELSEWHERE,
SEAS 11 TO 16 FT.
TUE
HURRICANE CONDITIONS EXPECTED. W OF 70W, E WINDS 45 TO
55 KT, INCREASING TO 70 TO 90 KT IN THE AFTERNOON,SEAS 16 TO
26 FT, BUILDING TO 20 TO 30 FT IN THE AFTERNOON. ELSEWHERE, SE
WINDS 30 TO 40 KT, SEAS 12 TO 17 FT.
TUE NIGHT
HURRICANE CONDITIONS EXPECTED. E WINDS 85 TO
105 KT W OF 70W, AND SE 30 TO 40 KT ELSEWHERE. SEAS 23 TO 33 FT
W OF 70W, AND 13 TO 18 FT ELSEWHERE.
WED
HURRICANE CONDITIONS POSSIBLE. SW WINDS 80 TO 100 KT W
OF 70W, AND S 30 TO 40 KT ELSEWHERE. SEAS 25 TO 35 FT W OF 70W,
AND 14 TO 19 FT ELSEWHERE.
WED NIGHT
HURRICANE CONDITIONS POSSIBLE.
THU
TROPICAL STORM CONDITIONS POSSIBLE.
THU NIGHT
W WINDS 20 TO 30 KT W OF 70W, AND SW 20 TO 30 KT
ELSEWHERE. SEAS 10 TO 15 FT W OF 70W, AND 12 TO 17 FT ELSEWHERE.
FRI
W OF 70W, NW WINDS 10 TO 15 KT. ELSEWHERE, W WINDS 20 TO
30 KT, DIMINISHING TO 10 TO 20 KT IN THE AFTERNOON. SEAS 9 TO
13 FT W OF 70W, AND 11 TO 16 FT ELSEWHERE.
BAHAMAS N OF 22N
..TROPICAL STORM WARNING
TODAY
TROPICAL STORM CONDITIONS POSSIBLE. N WINDS 25 TO
35 KT. SEAS 6 TO 9 FT.
TONIGHT
TROPICAL STORM CONDITIONS EXPECTED. N WINDS 25 TO
35 KT. SEAS 7 TO 10 FT.
TUE
TROPICAL STORM CONDITIONS POSSIBLE. NW WINDS 20 TO
30 KT. SEAS 7 TO 10 FT.
TUE NIGHT
W WINDS 20 TO 30 KT. SEAS 6 TO 9 FT.
WED
W WINDS 15 TO 25 KT. SEAS 5 TO 7 FT.
WED NIGHT
SW WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
THU
W WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
THU NIGHT
SW WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
FRI
W WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
..HURRICANE WARNING
TODAY
HURRICANE CONDITIONS. W OF 70W, NE WINDS 90 TO 110 KT,
INCREASING TO 100 TO 120 KT IN THE AFTERNOON,SEAS 17 TO 22 FT,
BUILDING TO 19 TO 29 FT IN THE AFTERNOON. ELSEWHERE, SE WINDS
90 TO 110 KT, DIMINISHING TO 55 TO 65 KT IN THE AFTERNOON,SEAS
16 TO 26 FT, SUBSIDING TO 17 TO 22 FT IN THE AFTERNOON.
TONIGHT
HURRICANE CONDITIONS EXPECTED. NE WINDS 95 TO 115 KT
W OF 70W, AND SE 40 TO 50 KT ELSEWHERE. SEAS 22 TO 32 FT W OF
70W, AND 15 TO 20 FT ELSEWHERE.
TUE
HURRICANE CONDITIONS EXPECTED. SW WINDS 90 TO 110 KT W
OF 70W, AND S 30 TO 40 KT ELSEWHERE. W OF 70W, SEAS 21 TO 31 FT,
SUBSIDING TO 18 TO 28 FT IN THE AFTERNOON. ELSEWHERE, SEAS 12 TO
17 FT.
TUE NIGHT
HURRICANE CONDITIONS EXPECTED. W OF 70W, SW WINDS
80 TO 100 KT, DIMINISHING TO 45 TO 55 KT AFTER MIDNIGHT.
ELSEWHERE, S WINDS 30 TO 40 KT. SEAS 15 TO 20 FT W OF 70W, AND
10 TO 15 FT ELSEWHERE.
WED
TROPICAL STORM CONDITIONS POSSIBLE. 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 11 TO 16 FT W OF 70W, AND
8 TO 13 FT ELSEWHERE.
WED NIGHT
S WINDS 20 TO 30 KT. SEAS 8 TO 13 FT W OF 70W, AND
7 TO 10 FT ELSEWHERE.
THU
SW WINDS 15 TO 25 KT W OF 70W, AND S 15 TO 25 KT
ELSEWHERE. SEAS 7 TO 10 FT.
THU NIGHT
S WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
FRI
SW WINDS 10 TO 15 KT. SEAS 6 TO 9 FT.
ATLC WATERS S OF 22N W OF 65W
..HURRICANE WARNING
TODAY
TROPICAL STORM CONDITIONS. SW WINDS 45 TO 55 KT,
DIMINISHING TO 35 TO 45 KT IN THE AFTERNOON. SEAS 9 TO 14 FT.
TONIGHT
TROPICAL STORM CONDITIONS EXPECTED. SW WINDS 30 TO
40 KT, BECOMING S 20 TO 30 KT AFTER MIDNIGHT. SEAS 8 TO 11 FT.
TUE
S WINDS 20 TO 30 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 3 TO 5 FT.
THU
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
THU NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W
TODAY
SE WINDS 15 TO 25 KT. SEAS 5 TO 7 FT.
TONIGHT
SE WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
TUE
SE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.
WED
E WINDS 10 TO 15 KT. SEAS 5 TO 6 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 6 FT.
THU
E WINDS 15 TO 25 KT. SEAS 6 TO 8 FT.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
FRI
E WINDS 10 TO 20 KT. SEAS 6 TO 9 FT.
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