163
FZNT31 KNHC 170910
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
510 AM 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 20.6N 66.4W AT 5 AM
EDT, AND IS MOVING WEST-NORTHWEST AT 12 KT. MAXIMUM SUSTAINED
WINDS ARE 110 KT WITH GUSTS TO 135 KT, AND THE MINIMUM CENTRAL
PRESSURE IS 940 MB. ERIN WILL MOVE TO 21.3N 67.9W THIS AFTERNOON,
22.5N 69.5W MON MORNING, 23.8N 70.6W MON AFTERNOON, 25.2N 71.5W
TUE MORNING, 26.9N 72.1W TUE AFTERNOON, AND 28.9N 72.2W WED
MORNING. ERIN WILL CHANGE LITTLE IN INTENSITY AS IT MOVES NEAR
33.3N 70.2W EARLY THU. PERIPHERY MODERATE TO FRESH SOUTH TO
SOUTHWEST WINDS OVER NORTHEASTERN CARIBBEAN WILL DIMINISH TO
GENTLE SPEEDS ON MON. TRADES ARE FORECAST TO INCREASE TO MOSTLY
FRESH SPEEDS ACROSS THE MOST OF THE CENTRAL AND NORTHEAST
SECTIONS OF THE BASIN BEGINNING LATE WED AS ATLANTIC HIGH
PRESSURE BUILDS WEST-SOUTHWESTWARD IN THE WAKE OF ERIN.
NW CARIBBEAN W OF 85W
TODAY
NE WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TONIGHT
E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
MON
NE WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
MON NIGHT
E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
TUE
VARIABLE WINDS LESS THAN 10 KT, BECOMING NE LESS THAN
10 KT IN THE AFTERNOON. SEAS 2 FT OR LESS.
TUE NIGHT
SE WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
WED
SE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
WED NIGHT
SE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
THU
SE WINDS 10 TO 20 KT. SEAS 2 FT OR LESS.
CARIBBEAN N OF 15N BETWEEN 72W AND 85W
TODAY
NE WINDS 10 TO 20 KT. SEAS 3 FT IN THE MORNING,
SUBSIDING TO 2 FT OR LESS.
TONIGHT
N WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
MON
N WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
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, N WINDS
10 TO 20 KT, SHIFTING TO W 10 TO 15 KT 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, W WINDS 10 TO 15 KT,
SHIFTING TO S AFTER MIDNIGHT. 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. SEAS 3 TO 4 FT S OF 18N, AND
2 FT OR LESS ELSEWHERE.
THU
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT S OF 18N, AND 2 FT OR
LESS ELSEWHERE.
CARIBBEAN FROM 11N TO 15N W OF 72W
TODAY
N WINDS LESS THAN 10 KT, SHIFTING TO W IN THE
AFTERNOON. SEAS 3 FT.
TONIGHT
NW WINDS 10 TO 15 KT, SHIFTING TO SW AFTER MIDNIGHT.
SEAS 3 FT.
MON
S WINDS LESS THAN 10 KT. SEAS 3 FT IN THE MORNING,
SUBSIDING TO 2 FT OR LESS.
MON NIGHT
NW WINDS LESS THAN 10 KT, SHIFTING TO E AFTER
MIDNIGHT. SEAS 2 FT OR LESS.
TUE
E WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
TUE NIGHT
E WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.
WED
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
THU
E WINDS 10 TO 20 KT WITHIN 90 NM OF COAST OF COLOMBIA,
AND E 15 TO 25 KT ELSEWHERE. SEAS 5 TO 7 FT WITHIN 90 NM OF
COAST OF COLOMBIA, AND 3 TO 5 FT ELSEWHERE.
SW CARIBBEAN S OF 11N
TODAY
SW WINDS LESS THAN 10 KT. SEAS 3 FT IN THE MORNING,
SUBSIDING TO 2 FT OR LESS.
TONIGHT
W WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
MON
SW WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
MON NIGHT
VARIABLE 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, DIMINISHING TO LESS THAN
10 KT AFTER MIDNIGHT. SEAS 2 FT OR LESS.
WED
NE WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS.
WED NIGHT
NE WINDS LESS THAN 10 KT, SHIFTING TO N AFTER
MIDNIGHT. SEAS 2 FT OR LESS, BUILDING TO 3 FT AFTER MIDNIGHT.
THU
NE WINDS 10 TO 15 KT, SHIFTING TO N IN THE AFTERNOON.
SEAS 3 TO 4 FT.
CARIBBEAN BETWEEN 64W AND 72W
TODAY
W WINDS LESS THAN 10 KT GULF OF VENEZUELA, AND SW 15 TO
25 KT ELSEWHERE. SEAS 2 FT OR LESS GULF OF VENEZUELA, AND 3 TO
5 FT ELSEWHERE.
TONIGHT
GULF OF VENEZUELA, N WINDS LESS THAN 10 KT IN THE
EVENING, BECOMING VARIABLE WINDS LESS THAN 10 KT. ELSEWHERE, S
WINDS 10 TO 20 KT. SEAS 2 FT OR LESS GULF OF VENEZUELA, AND 3 TO
5 FT ELSEWHERE.
MON
VARIABLE WINDS LESS THAN 10 KT GULF OF VENEZUELA, AND S
10 TO 20 KT ELSEWHERE. 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 4 FT ELSEWHERE.
TUE
SE 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
4 FT ELSEWHERE.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
WED
GULF OF VENEZUELA, SE WINDS 10 TO 20 KT, BECOMING NE LESS
THAN 10 KT IN THE AFTERNOON. ELSEWHERE, E WINDS 10 TO 20 KT.
SEAS 3 TO 4 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
THU
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 20 TO 30 KT. SEAS 5 TO 7 FT.
TONIGHT
SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
MON
SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
MON NIGHT
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 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 5 TO 7 FT.
THU
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
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
MON
E WINDS 10 TO 15 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
NE 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 4 TO 6 FT.
THU
E 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 20.6N 66.4W AT 5 AM
EDT, AND IS MOVING WEST-NORTHWEST AT 12 KT. MAXIMUM SUSTAINED
WINDS ARE 110 KT WITH GUSTS TO 135 KT, AND THE MINIMUM CENTRAL
PRESSURE IS 940 MB. ERIN WILL MOVE TO 21.3N 67.9W THIS AFTERNOON,
22.5N 69.5W MON MORNING, 23.8N 70.6W MON AFTERNOON, 25.2N 71.5W
TUE MORNING, 26.9N 72.1W TUE AFTERNOON, AND 28.9N 72.2W WED
MORNING. ERIN WILL CHANGE LITTLE IN INTENSITY AS IT MOVES NEAR
33.3N 70.2W EARLY THU. SWELLS GENERATED BY ERIN WILL CONTINUE TO
AFFECT PORTIONS OF THE VIRGIN ISLANDS, PUERTO RICO, HISPANIOLA,
AND THE TURKS AND CAICOS ISLANDS DURING THE NEXT COUPLE OF DAYS.
THESE SWELLS WILL SPREAD TO THE BAHAMAS, BERMUDA, THE EAST COAST
OF THE UNITED STATES, AND ATLANTIC CANADA DURING THE EARLY AND
MIDDLE PORTIONS OF THE WEEK. THESE ROUGH OCEAN CONDITIONS WILL
LIKELY CAUSE LIFE-THREATENING SURF AND RIP CURRENTS. OTHERWISE,SE
U.S. ON SUN. THE GRADIENT BETWEEN THE RIDGE AND ERIN WILL PROMOTE
MODERATE TO FRESH N TO NE WINDS OFFSHORE NORTHERN FLORIDA TO
NEAR 74W FROM MON THROUGH WED. IN THE WAKE OF ERIN, HIGH PRESSURE
WILL BUILD WEST-SOUTHWESTWARD ALONG 24N/25N THROUGH THU NIGHT.
ATLC WATERS FROM 27N TO 31N W OF 77W
TODAY
SW WINDS LESS THAN 10 KT, SHIFTING TO N IN THE
AFTERNOON. SEAS 3 FT.
TONIGHT
NE WINDS LESS THAN 10 KT. SEAS 3 TO 5 FT.
MON
NE WINDS LESS THAN 10 KT, INCREASING TO 10 TO 15 KT IN
THE AFTERNOON. SEAS 6 TO 9 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 11 TO 16 FT.
WED NIGHT
NW WINDS 10 TO 20 KT. SEAS 9 TO 13 FT.
THU
NW WINDS LESS THAN 10 KT. SEAS 8 TO 11 FT.
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
..TROPICAL STORM WARNING
TODAY
N WINDS 10 TO 15 KT, SHIFTING TO SE IN THE AFTERNOON.
SEAS 4 TO 6 FT W OF 70W, AND 7 TO 10 FT ELSEWHERE.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
MON
TROPICAL STORM CONDITIONS POSSIBLE. E WINDS 15 TO 25 KT.
SEAS 9 TO 14 FT.
MON NIGHT
TROPICAL STORM CONDITIONS EXPECTED. W OF 70W, NE
WINDS 20 TO 30 KT, INCREASING TO 30 TO 40 KT AFTER MIDNIGHT.
ELSEWHERE, SE WINDS 25 TO 35 KT. SEAS 12 TO 17 FT.
TUE
HURRICANE CONDITIONS POSSIBLE. W OF 70W, NE WINDS 50 TO
60 KT, INCREASING TO 85 TO 105 KT IN THE AFTERNOON,SEAS 16 TO
26 FT, BUILDING TO 21 TO 31 FT IN THE AFTERNOON. ELSEWHERE, SE
WINDS 35 TO 45 KT, SEAS 15 TO 20 FT.
TUE NIGHT
HURRICANE CONDITIONS POSSIBLE.
WED
HURRICANE CONDITIONS POSSIBLE.
WED NIGHT
HURRICANE CONDITIONS POSSIBLE.
THU
TROPICAL STORM CONDITIONS POSSIBLE.
BAHAMAS N OF 22N
TODAY
NE WINDS 10 TO 20 KT. SEAS 2 FT OR LESS, BUILDING TO
3 FT IN THE AFTERNOON.
TONIGHT
TROPICAL STORM CONDITIONS POSSIBLE. 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 20 TO 30 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 4 TO 6 FT.
THU
SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
ATLC WATERS FROM 22N TO 27N BETWEEN 65W AND THE BAHAMAS
..HURRICANE WARNING
TODAY
TROPICAL STORM CONDITIONS. W OF 70W, NE WINDS 20 TO
30 KT, SEAS 6 TO 8 FT, BUILDING TO 8 TO 11 FT IN THE AFTERNOON.
ELSEWHERE, E WINDS 35 TO 45 KT, INCREASING TO 45 TO 55 KT IN THE
AFTERNOON,SEAS 15 TO 20 FT.
TONIGHT
HURRICANE CONDITIONS EXPECTED. W OF 70W, NE WINDS
30 TO 40 KT, INCREASING TO 55 TO 65 KT AFTER MIDNIGHT,SEAS 10 TO
15 FT, BUILDING TO 14 TO 19 FT AFTER MIDNIGHT. ELSEWHERE, E
WINDS 75 TO 95 KT, BECOMING SE 95 TO 115 KT AFTER MIDNIGHT,SEAS
17 TO 27 FT.
MON
HURRICANE CONDITIONS EXPECTED. W OF 70W, NE WINDS 95 TO
115 KT, SEAS 17 TO 22 FT, BUILDING TO 18 TO 28 FT IN THE
AFTERNOON. ELSEWHERE, SE WINDS 95 TO 115 KT, DIMINISHING TO
60 TO 70 KT IN THE AFTERNOON,SEAS 17 TO 27 FT.
MON NIGHT
HURRICANE CONDITIONS EXPECTED. N WINDS 95 TO
115 KT W OF 70W, AND SE 45 TO 55 KT ELSEWHERE. W OF 70W, SEAS
21 TO 31 FT, BUILDING TO 24 TO 34 FT AFTER MIDNIGHT. ELSEWHERE,
SEAS 15 TO 25 FT, SUBSIDING TO 17 TO 22 FT AFTER MIDNIGHT.
TUE
HURRICANE CONDITIONS POSSIBLE. W WINDS 90 TO 110 KT W OF
70W, AND S 35 TO 45 KT ELSEWHERE. SEAS 24 TO 34 FT W OF 70W, AND
16 TO 21 FT ELSEWHERE.
TUE NIGHT
HURRICANE CONDITIONS POSSIBLE.
WED
TROPICAL STORM CONDITIONS POSSIBLE.
WED NIGHT
S WINDS 20 TO 30 KT. SEAS 8 TO 11 FT.
THU
S WINDS 10 TO 20 KT. SEAS 7 TO 10 FT.
ATLC WATERS S OF 22N W OF 65W
..HURRICANE WARNING
TODAY
HURRICANE CONDITIONS. N WINDS 85 TO 95 KT, INCREASING
TO 85 TO 105 KT IN THE AFTERNOON. SEAS 13 TO 18 FT.
TONIGHT
HURRICANE CONDITIONS EXPECTED. W WINDS 90 TO 110 KT,
BECOMING SW 80 TO 90 KT AFTER MIDNIGHT. SEAS 12 TO 17 FT.
MON
TROPICAL STORM CONDITIONS EXPECTED. SW WINDS 40 TO
50 KT, DIMINISHING TO 30 TO 40 KT IN THE AFTERNOON. SEAS 10 TO
15 FT.
MON NIGHT
TROPICAL STORM CONDITIONS POSSIBLE. SW WINDS 25 TO
35 KT. SEAS 8 TO 13 FT.
TUE
S WINDS 15 TO 25 KT. SEAS 7 TO 10 FT.
TUE NIGHT
S WINDS 10 TO 20 KT. SEAS 6 TO 8 FT.
WED
S WINDS 10 TO 20 KT. SEAS 5 TO 7 FT.
WED NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
THU
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
ATLC WATERS FROM 19N TO 22N BETWEEN 55W AND 65W
..TROPICAL STORM WARNING
TODAY
TROPICAL STORM CONDITIONS. SE WINDS 30 TO 40 KT. SEAS
9 TO 14 FT.
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 6 TO 8 FT.
TUE
SE WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
TUE NIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 6 FT.
WED
E WINDS 10 TO 20 KT. SEAS 6 TO 7 FT.
WED NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 7 FT.
THU
E WINDS 10 TO 20 KT. SEAS 6 TO 7 FT.
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