940
FZPN01 KWBC 162135
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC SAT AUG 16 2025

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

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.

ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE
NATIONAL WEATHER SERVICE. EMAIL US AT
VOSOPS@NOAA.GOV(LOWERCASE).

FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).

SECURITE

PACIFIC N OF 30N AND S OF 67N E OF A LINE FROM BERING STRAIT
TO 50N 160E

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 1800 UTC AUG 16.
24 HOUR FORECAST VALID 1800 UTC AUG 17.
48 HOUR FORECAST VALID 1800 UTC AUG 18.

.WARNINGS.

...GALE WARNING...
.LOW 58N145W 997 MB MOVING SE 10 KT. WITHIN 360 NM W AND SW
QUADRANTS WINDS 25 TO 40 KT. SEAS 2.5 TO 4 M. ELSEWHERE WITHIN
600 NM SW QUADRANT WINDS 20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 54N142W 1005 MB. FROM 54N TO 59N BETWEEN
150W AND 156W WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW DISSIPATED. CONDITIONS DIMINISHED.

...GALE WARNING...
.LOW 55N133W 994 MB MOVING NW 10 KT. WITHIN 240 NM S AND 120 NM
SW QUADRANTS WINDS 25 TO 35 KT. SEAS 3 TO 5 M. ELSEWHERE FROM
47N TO 55N BETWEEN 129W AND 145W WINDS 20 TO 30 KT. SEAS TO 3.5
M.
.24 HOUR FORECAST LOW DISSIPATED. FROM 57N TO 59N BETWEEN 139W
AND 142W WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.SYNOPSIS AND FORECAST.

.LOW 42N175E 1014 MB MOVING N 15 KT. FROM 39N TO 46N BETWEEN
178W AND 176E WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 50N178E 1015 MB. FROM 43N TO 49N BETWEEN
175W AND 179W WINDS LESS THAN 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LOW 53N164W 1010 MB. FROM 47N TO 51N BETWEEN
159W AND 170W WINDS LESS THAN 25 KT. SEAS LESS THAN 2.5 M

.48 HOUR FORECAST N OF 51N BETWEEN 168E AND 171E WINDS TO 25 KT.
SEAS TO 2.5 M.

.48 HOUR FORECAST LOW 51N136W 1009 MB. WITHIN 120 NM E OF A LINE
FROM 54N133W TO 49N129W WINDS 20 TO 30 KT. SEAS TO 2.5 M.

.KLYUCHEVSKOY VOLCANO 56.03N 160.38E HAS ERUPTED. VOLCANIC ASH
MAY BE REACHING THE SURFACE. MARINERS SHOULD EXERCISE CAUTION.
IF MARINERS ENCOUNTER VOLCANIC ASH OR FLOATING VOLCANIC DEBRIS
IN AND NEAR VICINITY YOU ARE ENCOURAGED TO REPORT THE
OBSERVATION TO THE OCEAN PREDICTION CENTER BY CALLING
301-683-1520.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 42N TO 55N
BETWEEN 164W AND 172E.
.24 HOUR FORECAST DENSE FOG FROM 44N TO 55N BETWEEN 162W AND
175E...ALSO W OF A LINE FROM 49N160E TO 43N163E.
.48 HOUR FORECAST DENSE FOG FROM 46N TO 54N BETWEEN 157W AND
176W...AND N OF 43 BETWEEN 162E AND 168E.

.FORECASTER SHAW. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 1800 UTC SAT AUG 16.
24 HOUR FORECAST VALID 1800 UTC SUN AUG 17.
48 HOUR FORECAST VALID 1800 UTC MON AUG 18.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 08N131W TO 07N134W TO 04N135W TO 03N134W TO 02N131W TO
03N129W TO 08N131W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN SE
SWELL.
.24 HOUR FORECAST WITHIN 08N136W TO 08N140W TO 05N140W TO
05N137W TO 06N136W TO 08N136W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN SE TO S SWELL.
.36 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.WITHIN 02S113W TO 01S120W TO 03.4S120W TO 03.4S113W TO 02S113W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S SWELL.
.24 HOUR FORECAST WITHIN 03S105W TO 02S115W TO 03S120W TO
03.4S120W TO 03.4S105W TO 03S105W WINDS 20 KT OR LESS. SEAS 2.5
TO 3.0 M IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 01S99W TO 01S106W TO 02S116W TO 03S117W
TO 03.4S96W TO 01S99W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN
SE TO S SWELL.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

CONVECTION VALID AT 2030 UTC SAT AUG 16...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 09N84W TO 07N105W TO 10N126W. ITCZ FROM
10N126W TO BEYOND 09N140W. SCATTERED MODERATE TO ISOLATED STRONG
WITHIN 200 NM ON EITHER SIDE OF THE BOUNDARIES BETWEEN 93W AND
112W AND W OF 128W.

$$
.FORECASTER ERA. NATIONAL HURRICANE CENTER.