376
FZNT31 KNHC 201529
OFFN20
MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI, FL
1129 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
MODERATE TO LOCALLY FRESH TRADE WINDS WILL OCCUR
OVER THE CENTRAL AND EASTERN CARIBBEAN TODAY. E TRADE WINDS WILL
INCREASE TO FRESH TO LOCALLY STRONG SPEEDS TONIGHT AND CONTINUE
THROUGH FRI AS A STRENGTHENING PRESSURE GRADIENT DEVELOPS BETWEEN
LOW PRESSURE OVER COLOMBIA AND BUILDING HIGH PRESSURE IN THE
WAKE OF HURRICANE ERIN. LOCALLY ROUGH SEAS WILL BE POSSIBLE NEAR
STRONG WINDS. ELSEWHERE, FRESH TO OCCASIONALLY STRONG E TO SE
WINDS WILL PULSE IN THE GULF OF HONDURAS THU THROUGH THIS
WEEKEND. LOOKING AHEAD, A TROPICAL WAVE LOCATED OVER THE CENTRAL
TROPICAL ATLANTIC WILL ENCOUNTER ENVIRONMENTAL CONDITIONS
CONDUCIVE FOR GRADUAL TROPICAL DEVELOPMENT, 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.
THERE IS A LOW CHANCE OF DEVELOPMENT WITHIN THE NEXT 48 HOURS,
AND A MEDIUM CHANCE WITHIN THE NEXT 7 DAYS.
NW CARIBBEAN W OF 85W
THIS AFTERNOON
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.
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
THIS AFTERNOON
SE WINDS 10 TO 20 KT. SEAS 2 FT OR LESS.
TONIGHT
E 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 5 FT S OF 18N, AND 2 FT OR
LESS ELSEWHERE.
THU NIGHT
E WINDS 10 TO 20 KT. S OF 18N, SEAS 3 TO 5 FT.
ELSEWHERE, SEAS 3 FT IN THE EVENING, SUBSIDING TO 2 FT OR LESS.
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 3 FT IN THE EVENING, SUBSIDING TO 2 FT OR LESS.
SUN
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
THIS AFTERNOON
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
TONIGHT
NE WINDS 15 TO 25 KT. SEAS 3 TO 5 FT.
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 4 TO 6 FT.
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
THIS AFTERNOON
NE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS,
BUILDING TO 3 FT IN THE AFTERNOON.
TONIGHT
N WINDS 10 TO 20 KT. SEAS 3 FT.
THU
N WINDS 10 TO 20 KT. SEAS 3 TO 4 FT.
THU NIGHT
NW WINDS 10 TO 15 KT. SEAS 3 TO 4 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
THIS AFTERNOON
E WINDS 15 TO 25 KT. SEAS 3 TO 5 FT.
TONIGHT
E WINDS 20 TO 30 KT GULF OF VENEZUELA, AND E 15 TO
25 KT ELSEWHERE. SEAS 5 TO 7 FT.
THU
GULF OF VENEZUELA, E WINDS 20 TO 25 KT, SHIFTING TO NE
10 TO 20 KT IN THE AFTERNOON. ELSEWHERE, E WINDS 15 TO 25 KT.
SEAS 5 TO 7 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 15 TO 25 KT. 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
THIS AFTERNOON
E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 5 TO 7 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 3 TO 5 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
THIS AFTERNOON
E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT.
TONIGHT
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
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 29.6N 73.7W AT
20/1200 UTC OR 490 NM WSW OF BERMUDA, MOVING NNW AT 11 KT.
ESTIMATED MINIMUM CENTRAL PRESSURE IS 948 MB. MAXIMUM SUSTAINED
WIND SPEED IS 85 KT WITH GUSTS TO 105 KT. A TURN TOWARD THE
NORTH-NORTHEAST IS EXPECTED LATER TODAY AND TONIGHT, FOLLOWED BY
A FASTER MOTION TOWARD THE NORTHEAST AND EAST-NORTHEAST BY
THURSDAY AND FRIDAY. ON THE FORECAST TRACK, THE CENTER OF ERIN
WILL MOVE OVER THE WESTERN ATLANTIC BETWEEN THE U.S. EAST COAST
AND BERMUDA TODAY THROUGH EARLY FRIDAY, AND THEN PASS SOUTH OF
ATLANTIC CANADA FRIDAY AND SATURDAY. SWELLS GENERATED BY ERIN
WILL AFFECT THE BAHAMAS, BERMUDA, AND THE EAST COAST OF THE
UNITED STATES DURING THE NEXT SEVERAL DAYS. LOOKING AHEAD, A
TROPICAL WAVE LOCATED OVER THE CENTRAL TROPICAL ATLANTIC WILL
ENCOUNTER ENVIRONMENTAL CONDITIONS CONDUCIVE FOR GRADUAL TROPICAL
DEVELOPMENT, 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. THERE IS A LOW CHANCE OF DEVELOPMENT
WITHIN THE NEXT 48 HOURS, AND A MEDIUM CHANCE WITHIN THE NEXT 7
DAYS. ELSEWHERE, A TROPICAL WAVE LOCATED TO THE SOUTHWEST OF THE
CABO VERDE ISLANDS WILL ENCOUNTER ENVIRONMENTAL CONDITIONS
MARGINALLY FAVORABLE FOR ADDITIONAL DEVELOPMENT OVER THE NEXT DAY
OR SO WHILE THE SYSTEM MOVES WESTWARD AT AROUND 15 MPH AND A
SHORT-LIVED TROPICAL DEPRESSION COULD FORM. BY THE END OF THE
WEEK, ENVIRONMENTAL CONDITIONS ARE EXPECTED TO BECOME UNFAVORABLE
FOR FURTHER DEVELOPMENT. THERE IS A MEDIUM CHANCE OF DEVELOPMENT
WITHIN THE NEXT 48 HOURS AND THE NEXT 7 DAYS.
ATLC WATERS FROM 27N TO 31N W OF 77W
THIS AFTERNOON
N WINDS 20 TO 30 KT. SEAS 14 TO 23 FT.
TONIGHT
NW WINDS 20 TO 30 KT. SEAS 13 TO 22 FT.
THU
NW WINDS 15 TO 25 KT. SEAS 10 TO 15 FT.
THU NIGHT
W WINDS 10 TO 15 KT, DIMINISHING TO LESS THAN 10 KT
AFTER MIDNIGHT. SEAS 7 TO 10 FT.
FRI
W WINDS LESS THAN 10 KT. SEAS 6 TO 8 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 LESS THAN 10 KT, INCREASING TO 10 TO 15 KT
AFTER MIDNIGHT. 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
THIS AFTERNOON
HURRICANE CONDITIONS. SW WINDS 80 TO 95 KT W
OF 70W, AND S 25 TO 35 KT ELSEWHERE. SEAS 26 TO 50 FT W OF 70W,
AND 14 TO 19 FT ELSEWHERE.
TONIGHT
TROPICAL STORM CONDITIONS EXPECTED. W OF 70W, SW
WINDS 70 TO 90 KT, DIMINISHING TO 40 TO 50 KT AFTER
MIDNIGHT, SEAS 22 TO 44 FT, SUBSIDING TO 17 TO 27 FT AFTER
MIDNIGHT. ELSEWHERE, S WINDS 25 TO 35 KT, SEAS 13 TO 18 FT.
THU
TROPICAL STORM CONDITIONS POSSIBLE. W WINDS 25 TO 35 KT
W OF 70W, AND S 20 TO 30 KT ELSEWHERE. W OF 70W, SEAS 16 TO
21 FT, SUBSIDING TO 12 TO 17 FT IN THE AFTERNOON. ELSEWHERE,
SEAS 12 TO 17 FT.
THU NIGHT
W WINDS 20 TO 30 KT W OF 70W, AND SW 20 TO 30 KT
ELSEWHERE. SEAS 10 TO 15 FT.
FRI
NW WINDS 10 TO 20 KT W OF 70W, AND SW 20 TO 30 KT
ELSEWHERE. SEAS 8 TO 11 FT W OF 70W, AND 9 TO 14 FT ELSEWHERE.
FRI NIGHT
W OF 70W, N WINDS 10 TO 15 KT, SHIFTING TO NE AFTER
MIDNIGHT. ELSEWHERE, W WINDS 10 TO 20 KT. SEAS 8 TO 11 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
THIS AFTERNOON
W WINDS 15 TO 25 KT. SEAS 6 TO 9 FT.
TONIGHT
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
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 4 FT.
FRI NIGHT
NE WINDS LESS THAN 10 KT, SHIFTING TO E AFTER
MIDNIGHT. SEAS 3 TO 4 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
THIS AFTERNOON
TROPICAL STORM CONDITIONS POSSIBLE. S WINDS
20 TO 30 KT. SEAS 11 TO 22 FT W OF 70W, AND 8 TO 13 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 AFTER MIDNIGHT. 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 6 TO 9 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 8 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 AFTER
MIDNIGHT. 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
THIS AFTERNOON
SE WINDS 10 TO 15 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
THIS AFTERNOON
E WINDS 10 TO 15 KT. SEAS 6 FT.
TONIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 7 FT.
THU
E WINDS 10 TO 20 KT. SEAS 6 TO 7 FT.
THU NIGHT
E WINDS 10 TO 20 KT. SEAS 6 TO 7 FT.
FRI
E WINDS 15 TO 25 KT. SEAS 6 TO 7 FT.
FRI NIGHT
SE WINDS 15 TO 25 KT. SEAS 6 TO 7 FT.
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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