485
FZPN28 KNHC 171842 AAA
OFFPZ8

Offshore Waters Forecast...Updated
NWS National Hurricane Center Miami, FL
1142 AM PDT Thu Apr 17 2025

Updated to include Santa Maria Volcano information in the
synopsis

Offshore Waters Forecast for the E Pacific within 250 nm of
Central America, Colombia, and within 750 nm of Ecuador

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.

PMZ101-180445-
Synopsis for the E Pacific within 250 nm of Central America,
Colombia, and within 750 nm of Ecuador...Updated
1142 AM PDT Thu Apr 17 2025

.SYNOPSIS...High pressure that extends from the southeastern
United States to the northwestern Caribbean will shift gradually
eastward during the next few days, with the associated gradient
allowing for fresh to strong northeast to east gap winds across
the Papagayo region, pulsing to near 30 kt at night through Sat
night, then diminishing slightly through Mon night. The same
gradient will produce moderate to fresh north winds in the Gulf
of Panama south to near 5N through Sat night. Fresh to strong
north to northeast winds are expected in the Gulf of Panama
tonight and Fri night. Moderate southwest swell is forecast to
propagate through the regional waters Mon.

The Santa Maria Volcano located in southwestern Guatemala near
14.8N91.6W is presently undergoing continuous volcanic ash
emissions. The volcanic ash near the volcano is moving to
southwest. Latest GOES-E satellite imagery shows resultant hazy
skies along the coast of Guatemala, with similar conditions
along and near the coast near 14N92W. Reduced visibility is
presently more likely to be near the coast. Mariners are
encouraged to be aware of the latest updates on the status of
the volcano.

$$

PMZ111-180445-
Guatemala and El Salvador to 250 nm offshore-

.TODAY...E winds 10 to 15 kt. Seas 6 to 8 ft in NE to E swell.
Period 14 seconds. Haze.
.TONIGHT...NE to E winds 10 to 15 kt. Seas 6 to 8 ft in E to SE
swell. Period 16 seconds. Haze.
.FRI...E winds 10 to 15 kt. Seas 5 to 7 ft in E to SE swell.
Period 16 seconds. Haze.
.FRI NIGHT...N to NE winds 10 kt. Seas 5 to 7 ft in E to SE
swell. Period 16 seconds. Scattered showers through the night.
.SAT...NE winds 10 to 15 kt. Seas 5 to 7 ft in E to SE swell.
Period 14 seconds. Haze.
.SAT NIGHT...N winds 10 kt. Seas 5 to 7 ft in E to SE swell.
Period 14 seconds.
.SUN...N to NE winds 10 to 15 kt. Seas 4 to 6 ft. Period
13 seconds.
.SUN NIGHT...N winds 10 kt. Seas 4 to 6 ft in S to SW swell.
Period 15 seconds.
.MON...N to NE winds 10 to 15 kt. Seas 5 to 7 ft in S to SW
swell. Period 16 seconds.
.MON NIGHT...NE winds 10 kt. Seas 5 to 7 ft in S to SW swell.
Period 16 seconds.

$$

PMZ113-180445-
El Salvador to North Costa Rica including the Gulfs of Fonseca
and Papagayo-
1142 AM PDT Thu Apr 17 2025

.TODAY...NE to E winds 20 to 25 kt. Seas 6 to 9 ft in NE to E
swell. Period 10 seconds. Haze.
.TONIGHT...NE to E winds 25 kt Offshore Gulf of Papagayo, and E
15 to 20 kt Elsewhere. Seas 6 to 8 ft. Period 11 seconds.
.FRI...NE to E winds 20 to 25 kt Offshore Gulf of Papagayo, and
NE to E 15 to 20 kt Elsewhere. Seas 6 to 9 ft in NE to E swell.
Period 15 seconds. Haze.
.FRI NIGHT...NE to E winds 25 kt Offshore Gulf of Papagayo, and
NE to E 20 to 25 kt Elsewhere. Seas 6 to 9 ft in NE to E swell.
Period 16 seconds. Haze.
.SAT...NE to E winds 15 to 20 kt. Seas 6 to 8 ft in NE to E
swell. Period 12 seconds.
.SAT NIGHT...NE to E winds 20 to 25 kt Offshore Gulf of
Papagayo, and N to NE 10 to 15 kt Elsewhere. Seas 4 to 6 ft.
Period 12 seconds.
.SUN...NE to E winds 15 to 20 kt. Seas 6 to 8 ft in S swell.
Period 13 seconds.
.SUN NIGHT...NE to E winds 20 to 25 kt Offshore Gulf of
Papagayo, and NE 10 to 15 kt Elsewhere. Seas 5 to 7 ft. Period
14 seconds.
.MON...NE winds 15 to 20 kt. Seas 5 to 7 ft. Period 15 seconds.
.MON NIGHT...E winds 15 to 20 kt. Seas 5 to 7 ft. Period
16 seconds.

$$

PMZ115-180445-
North Costa Rica to West Panama to 250 nm offshore-
1142 AM PDT Thu Apr 17 2025

.TODAY...Near the Azuero Peninsula, NE winds 10 to 15 kt,
shifting to S in the afternoon. Elsewhere, variable winds less
than 5 kt. Seas 4 to 6 ft in S swell. Period 14 seconds.
Scattered showers through the day.
.TONIGHT...Near the Azuero Peninsula, NW winds 10 to 15 kt,
shifting to N to NE 15 to 20 kt late. Elsewhere,
variable winds less than 5 kt. Seas 5 to 7 ft in S swell. Period
15 seconds.
.FRI...Near the Azuero Peninsula, N to NE winds 15 to 20 kt,
shifting to W 10 to 15 kt in the afternoon. Elsewhere, NW winds
10 kt, shifting to W in the afternoon. Seas 5 to 7 ft in S
swell. Period 15 seconds.
.FRI NIGHT...W winds 10 kt. Seas 5 to 7 ft in S swell. Period
15 seconds. Scattered showers through the night.
.SAT...SW to W winds 10 kt. Seas 4 to 6 ft in S swell. Period
13 seconds.
.SAT NIGHT...W winds 10 kt. Seas 4 to 6 ft in S swell. Period
14 seconds.
.SUN...SW to W winds 10 kt. Seas 3 to 5 ft. Period 13 seconds.
.SUN NIGHT...W winds 10 kt. Seas 3 to 5 ft. Period 15 seconds.
.MON...S winds 10 kt. Seas 3 to 5 ft. Period 15 seconds.
.MON NIGHT...S to SW winds 10 kt. Seas 4 to 6 ft in S to SW
swell. Period 16 seconds.

$$

PMZ117-180445-
East Panama and Colombia including the Gulf of Panama-
1142 AM PDT Thu Apr 17 2025

.TODAY...Gulf of Panama, N to NE winds 15 to 20 kt. Elsewhere,
NE winds 10 kt, shifting to NW to N in the afternoon. Seas 4 to
6 ft. Period 17 seconds. Winds and seas higher in and near
scattered to numerous showers and thunderstorms.
.TONIGHT...N to NE winds 15 to 20 kt Gulf of Panama, and NE
10 to 15 kt Elsewhere. Seas 5 to 7 ft. Period 16 seconds.
Scattered showers and thunderstorms.
.FRI...N winds 15 to 20 kt. Seas 5 to 7 ft. Period 16 seconds.
Scattered showers and isolated thunderstorms.
.FRI NIGHT...Gulf of Panama, N winds 15 to 20 kt. Elsewhere, N
winds 10 kt, shifting to SE late. Seas 4 to 6 ft. Period 16
seconds. Scattered showers and isolated thunderstorms.
.SAT...NW winds 10 to 15 kt. Seas 4 to 6 ft. Period 12 seconds.
.SAT NIGHT...NW winds 10 kt. Seas 3 to 5 ft in mixed SE and SW
swell. Period 14 seconds.
.SUN...W winds 10 kt. Seas 3 to 5 ft in mixed SE and SW swell.
Period 13 seconds.
.SUN NIGHT...E to SE winds 10 kt. Seas 3 to 5 ft in SW swell.
Period 14 seconds.
.MON...S winds 10 kt. Seas 4 to 6 ft in SW swell. Period
14 seconds.
.MON NIGHT...Variable winds less than 5 kt Gulf of Panama, and S
to SW 10 kt Elsewhere. Seas 4 to 6 ft in SW swell. Period
16 seconds.

$$

PMZ119-180445-
Ecuador including the Gulf of Guayaquil to 250 nm offshore-
1142 AM PDT Thu Apr 17 2025

.TODAY...Gulf of Guayaquil, variable winds less than 5 kt,
becoming W to NW 10 kt in the afternoon. Elsewhere, SE to S
winds 10 kt, shifting to SW to W in the afternoon. Seas 4 to
6 ft in S swell. Period 16 seconds. Isolated showers and
thunderstorms.
.TONIGHT...S to SW winds 10 kt. Seas 4 to 6 ft in S swell.
Period 15 seconds. Isolated showers and thunderstorms.
.FRI...S to SW winds 10 kt. Seas 3 to 5 ft in S swell. Period 15
seconds. Isolated Scattered showers through the day.
.FRI NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. Period
15 seconds. Scattered showers and isolated thunderstorms.
.SAT...S to SW winds 10 to 15 kt. Seas 4 to 6 ft. Period 14
seconds.
.SAT NIGHT...S to SW winds 10 to 15 kt. Seas 3 to 5 ft. Period
13 seconds.
.SUN...S winds 10 to 15 kt. Seas 4 to 6 ft. Period 13 seconds.
.SUN NIGHT...S to SW winds 10 kt. Seas 4 to 6 ft in S to SW
swell. Period 14 seconds.
.MON...S winds 10 to 15 kt. Seas 4 to 6 ft. Period 16 seconds.
.MON NIGHT...S winds 10 kt. Seas 5 to 7 ft in SW swell. Period
16 seconds.

$$

PMZ121-180445-
Ecuador between 250 and 500 nm offshore-
1142 AM PDT Thu Apr 17 2025

.TODAY...SE winds 10 to 15 kt. Seas 4 to 6 ft in S swell. Period
8 seconds.
.TONIGHT...SE winds 10 kt. Seas 4 to 6 ft in S swell. Period
15 seconds.
.FRI...SE to S winds 10 kt. Seas 4 to 6 ft in S swell. Period
15 seconds.
.FRI NIGHT...SE to S winds 10 kt. Seas 4 to 6 ft in S to SW
swell. Period 15 seconds.
.SAT...SE to S winds 10 kt. Seas 4 to 6 ft in S to SW swell.
Period 13 seconds.
.SAT NIGHT...SE to S winds 10 kt. Seas 4 to 6 ft in S to SW
swell. Period 13 seconds.
.SUN...SE to S winds 10 kt. Seas 4 to 6 ft in S to SW swell.
Period 14 seconds.
.SUN NIGHT...S winds 10 kt. Seas 4 to 6 ft in S to SW swell.
Period 16 seconds.
.MON...SE to S winds 10 kt. Seas 5 to 7 ft in S to SW swell.
Period 16 seconds.
.MON NIGHT...SE to S winds 10 kt. Seas 5 to 7 ft in S to SW
swell. Period 16 seconds.

$$

PMZ123-180445-
Offshore Galapagos Islands-
1142 AM PDT Thu Apr 17 2025

.TODAY...E to SE winds 10 kt. Seas 4 to 6 ft in S swell. Period
14 seconds. Isolated showers.
.TONIGHT...SE winds 10 kt. Seas 4 to 6 ft in S swell. Period
15 seconds. Isolated showers.
.FRI...SE winds 10 kt. Seas 4 to 6 ft in S swell. Period
15 seconds. Isolated showers.
.FRI NIGHT...SE winds 10 kt. Seas 4 to 6 ft in S to SW swell.
Period 14 seconds.  Isolated showers.
.SAT...SE winds 10 kt. Seas 4 to 6 ft in S to SW swell. Period
12 seconds.
.SAT NIGHT...SE to S winds 10 kt. Seas 4 to 6 ft in S to SW
swell. Period 13 seconds.
.SUN...SE to S winds 10 kt. Seas 4 to 6 ft in S to SW swell.
Period 13 seconds.
.SUN NIGHT...SE to S winds 10 kt Elsewhere, and variable less
than 5 kt Lee of Galapagos Islands. Seas 5 to 7 ft in SW swell.
Period 13 seconds.
.MON...SE to S winds 10 kt. Seas 5 to 7 ft in SW swell. Period
16 seconds.
.MON NIGHT...SE to S winds 10 kt. Seas 5 to 7 ft in SW swell.
Period 15 seconds.

$$

Forecaster Aguirre