000
FZNT31 KNHC 130930
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
530 AM EDT Thu Mar 13 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...A weakening frontal boundary extends from the
central Atlantic southwestward to along the southern coast of
Hispaniola and is expected to dissipate today. Moderate
northwesterly swell will impact the Atlantic passages this
morning through early Fri. Weak high pressure northeast of the
Bahamas will shift slowly northeastward through Fri to support
pulsing fresh to strong trades off northern Colombia, while
moderate to fresh NE to E winds pulse near the Windward Passage
and south of the Dominican Republic. Similar winds will pulse
off eastern Honduras, becoming fresh to strong SE to S winds Fri
night through early Sun. A cold front will approach the Yucatan
Channel Sun night into Mon, with increasing winds and seas
behind it. The front is expected to reach from central Cuba to
northern Belize by Mon evening. 

NW Caribbean W of 85W

.TODAY...SE winds 10 to 15 kt. Seas 3 to 4 ft. 
.TONIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI...SE winds 10 to 20 kt. Seas 3 to 5 ft. 
.FRI NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT...SE winds 15 to 25 kt. Seas 6 to 9 ft. 
.SAT NIGHT...SE winds 15 to 25 kt. Seas 6 to 8 ft. 
.SUN...SE winds 15 to 25 kt. Seas 6 to 9 ft. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.MON...NE winds 10 to 15 kt. Seas 5 to 7 ft. 
.MON NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. 

Caribbean N of 15N between 72W and 85W

.TODAY...E winds 10 to 15 kt S of 18N, and SE less than 10 kt
elsewhere. Seas 3 to 4 ft. 
.TONIGHT...S of 18N, E winds less than 10 kt, increasing to
10 to 15 kt after midnight. Elsewhere, SE winds less than 10 kt.
Seas 3 to 4 ft. 
.FRI...E winds less than 10 kt. Seas 3 to 4 ft. 
.FRI NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft. 
.SAT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.SAT NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.SUN...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. 

Caribbean from 11N to 15N W of 72W

.TODAY...E winds 15 to 20 kt within 90 nm of coast of Colombia,
and E 10 to 15 kt elsewhere. Seas 4 to 6 ft. 
.TONIGHT...NE winds 15 to 20 kt within 90 nm of coast of
Colombia, and NE 10 to 15 kt elsewhere. Seas 4 to 6 ft. 
.FRI...E winds 15 to 25 kt within 90 nm of coast of Colombia,
and E 10 to 15 kt elsewhere. Seas 4 to 6 ft. 
.FRI NIGHT...NE winds 15 to 20 kt within 90 nm of coast of
Colombia, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. 
.SAT...E winds 10 to 15 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. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON NIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. 

SW Caribbean S of 11N

.TODAY...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.TONIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.FRI...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.FRI NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.SAT...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.SAT NIGHT...NE winds 10 to 15 kt, diminishing to less than
10 kt after midnight. Seas 4 to 6 ft. 
.SUN...NE winds less than 10 kt. Seas 4 to 6 ft. 
.SUN NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON NIGHT...N winds 10 to 20 kt. Seas 4 to 6 ft. 

Caribbean between 64W and 72W

.TODAY...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 to 4 ft. 
.TONIGHT...NE winds 15 to 20 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 to 5 ft. 
.FRI...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt
elsewhere. Seas 3 to 5 ft. 
.FRI NIGHT...NE winds 15 to 20 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 to 4 ft. 
.SAT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON...E winds 10 to 15 kt. Seas 4 to 5 ft. 
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 

Offshore Leeward Islands and adjacent ATLC waters from 15N to
19N W of 55W

.TODAY...SE winds less than 10 kt. Seas 4 to 6 ft. 
.TONIGHT...E winds less than 10 kt. Seas 4 to 6 ft. 
.FRI...E winds less than 10 kt. Seas 4 to 6 ft. 
.FRI NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 4 to 6 ft. 
.SAT...SE winds less than 10 kt. Seas 4 to 6 ft. 
.SAT NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. 
.SUN...E winds less than 10 kt. Seas 4 to 6 ft. 
.SUN NIGHT...NE winds less than 10 kt. Seas 5 to 7 ft. 
.MON...E winds less than 10 kt. Seas 5 to 7 ft. 
.MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 

Offshore Windward Islands and adjacent ATLC waters from 07N to
15N W of 55W

.TODAY...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SAT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...A cold front extends from near 27N55W to across 
southeastern Hispaniola. Strong SW wind and rough seas continue 
ahead the front north of 24N, while strong W to NW winds and
very rough seas prevail behind the front north of 25N and E of 
65W. The front will reach from 24N55W to near the NW coast of 
Puerto Rico by this evening, then weaken from 22N55W to the 
northern Mona Passage Fri. Large NW to W swell behind the front 
will shift east and southeastward through Fri. Winds and seas 
will diminish from west to east through Fri as high pressure 
builds over the western Atlantic in the wake of the front. Winds 
are forecast to increase north of 21N this weekend as the 
pressure gradient tightens between the remnants of the cold front
and strong high pressure to the N. These winds will support 
building seas across most of the basin. The next cold front will 
push off the SE United States coast early Mon, reaching from 
31N73W to the central Bahamas by Mon evening.

ATLC waters from 27N to 31N W of 77W

.TODAY...SW winds 10 to 15 kt. Seas 3 to 4 ft. 
.TONIGHT...S winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 3 to 4 ft. 
.FRI...SE winds less than 10 kt. Seas 3 to 4 ft. 
.FRI NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. 
.SAT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT NIGHT...SE winds 15 to 25 kt. Seas 6 to 8 ft. 
.SUN...S winds 15 to 25 kt. Seas 6 to 9 ft. 
.SUN NIGHT...S winds 15 to 25 kt. Seas 6 to 9 ft. 
.MON...NW winds 10 to 20 kt. Seas 6 to 9 ft. 
.MON NIGHT...N winds 15 to 25 kt. Seas 6 to 9 ft. 

ATLC waters from 27N to 31N between 65W and 77W

.TODAY...W of 70W, S winds less than 10 kt. Elsewhere, NE winds
10 to 15 kt, shifting to E in the afternoon. Seas 4 to 6 ft W of
70W, and 7 to 10 ft elsewhere. 
.TONIGHT...SE winds less than 10 kt. Seas 5 to 7 ft.
.FRI...SE winds less than 10 kt W of 70W, and SE 10 to 15 kt
elsewhere. Seas 3 to 4 ft W of 70W, and 5 to 7 ft elsewhere. 
.FRI NIGHT...SE winds less than 10 kt W of 70W, and E 10 to
20 kt elsewhere. Seas 3 to 5 ft W of 70W, and 6 to 8 ft
elsewhere. 
.SAT...SE winds 10 to 20 kt. Seas 6 to 8 ft. 
.SAT NIGHT...SE winds 10 to 20 kt. Seas 6 to 9 ft. 
.SUN...SE winds 10 to 20 kt. Seas 7 to 10 ft. 
.SUN NIGHT...SE winds 10 to 20 kt. Seas 7 to 10 ft. 
.MON...S winds 10 to 20 kt. Seas 7 to 9 ft. 
.MON NIGHT...SW winds 15 to 25 kt. Seas 7 to 9 ft. 

Bahamas N of 22N

.TODAY...SE winds less than 10 kt. Seas 3 to 4 ft. 
.TONIGHT...SE winds less than 10 kt. Seas 3 ft. 
.FRI...SE winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less. 
.FRI NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less, building to 3 to 4 ft after
midnight. 
.SAT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN...SE winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft. 
.MON NIGHT...N winds 10 to 20 kt. Seas 3 to 5 ft. 

ATLC waters from 22N to 27N between 65W and the Bahamas

.TODAY...E winds less than 10 kt W of 70W, and NE 10 to 15 kt
elsewhere. Seas 6 to 9 ft. 
.TONIGHT...E winds less than 10 kt W of 70W, and E 10 to 15 kt
elsewhere. Seas 5 to 7 ft. 
.FRI...SE winds less than 10 kt W of 70W, and E 10 to 15 kt
elsewhere. Seas 4 to 6 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft W of 70W, and
6 to 8 ft elsewhere. 
.SAT...E winds 10 to 15 kt. Seas 6 to 8 ft. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. 
.SUN...E winds 10 to 20 kt. Seas 7 to 10 ft. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. 
.MON...SE winds 10 to 20 kt. Seas 7 to 10 ft. 
.MON NIGHT...SE winds 10 to 15 kt. Seas 6 to 9 ft. 

ATLC waters S of 22N W of 65W

.TODAY...NE winds less than 10 kt. Seas 4 to 6 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.FRI...E winds less than 10 kt. Seas 4 to 6 ft. 
.FRI NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. 
.SAT...NE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 4 to 6 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.SUN...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.MON...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. 

ATLC waters from 19N to 22N between 55W and 65W

.TODAY...W winds less than 10 kt. Seas 6 to 8 ft. 
.TONIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. 
.FRI...E winds less than 10 kt. Seas 6 to 7 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. 
.SAT...E winds less than 10 kt. Seas 6 to 8 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft. 
.SUN...E winds 10 to 15 kt. Seas 6 to 8 ft. 
.SUN NIGHT...NE winds 10 to 20 kt. Seas 7 to 9 ft. 
.MON...NE winds 10 to 20 kt. Seas 7 to 10 ft. 
.MON NIGHT...NE winds 10 to 15 kt. Seas 7 to 10 ft.