436
FZPN01 KWBC 052203
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC TUE AUG 05 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 05.
24 HOUR FORECAST VALID 1800 UTC AUG 06.
48 HOUR FORECAST VALID 1800 UTC AUG 07.

.WARNINGS.

...GALE WARNING...
.LOW 51N132W 1004 MB MOVING NE 10 KT. WITHIN 300 NM E SEMICIRCLE
WINDS 25 TO 40 KT. SEAS TO 3.5 M. ELSEWHERE WITHIN 300 NM
NW...480 NM SE AND 1020 NM SW QUADRANTS WINDS TO 25 KT. SEAS TO
3.5 M.
.24 HOUR FORECAST LOW 54N130W 1012 MB. WITHIN 240 NM NW AND 1020
NM SW QUADRANTS WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

..GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 46N169W 996 MB MOVING NE 30 KT AND
SECOND CENTER 49N164W 996 MB MOVING N 10 KT THEN TURNING NW
AFTER 12 HOURS. WITHIN 420 NM SE AND 720 NM SW QUADRANTS OF MAIN
CENTER WINDS 25 TO 40 KT. SEAS 2.5 TO 4 M. ELSEWHERE WITHIN 840
NM S SEMICIRCLE...AND 600 NM NE QUADRANT OF MAIN CENTER WINDS TO
25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 55N169W 990 MB. BETWEEN 420 NM AND 840NM
SE QUADRANT...AND WITHIN 360 NM NE QUADRANT WINDS 25 TO 40 KT.
SEAS 2.5 TO 4 M. ELSEWHERE WITHIN 1260 NM S SEMICIRCLE...AND
WITHIN 420 NM NW AND 540 NM NE QUADRANT WINDS TO 25 KT. SEAS TO
3.5 M.
.48 HOUR FORECAST LOW 54N164W 998 MB. WITHIN 240 NM NE OF A LINE
FROM 58N151W TO 57N145W TO 54N140W WINDS 25 TO 40 KT. SEAS TO
3.5 M. ELSEWHERE WITHIN 600 NM NW...840 NM NE...1200 NM SE AND
480 NM SW QUADRANTS WINDS TO 25 KT. SEAS TO 2.5 M.

...GALE WARNING...
.TROPICAL DEPRESSION BAILU NEAR NEAR 39.7N 160.4E 998 MB.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 300 NM E
SEMICIRCLE SEAS 2.5 TO 4 M.
.24 HOUR FORECAST POST-TROPICAL CYCLONE BAILU 43N168E 1000 MB.
WITHIN 300 NM S SEMICIRCLE WINDS 25 TO 40 KT. SEAS 2.5 TO 4.5 M.
ELSEWHERE WITHIN 360 NM N AND 480 NM S SEMICIRCLES WINDS TO 25
KT. SEAS TO 2.5 M.
.48 HOUR FORECAST POST-TROPICAL CYCLONE BAILU 45N175W 1004 MB.
WITHIN 420 NM S SEMICIRCLE WINDS 25 TO 35 KT. SEAS TO 3.5 M.
ELSEWHERE FROM 36N TO 47N BETWEEN 168W AND 173E WINDS TO 25 KT.
SEAS TO 2.5 TO M.

.SYNOPSIS AND FORECAST.

.KLYUCHEVSKOY VOLCANO 56.0N 160.4E HAS ERUPTED AT 0520 UTC 5 AUG
2025. VOLCANIC ASH MAY BE REACHING THE SURFACE NEAR/IN THE
VICINITY OF 480 NM SW OF ADAK, ALASKA. MARINERS SHOULD EXERCISE
CAUTION. IF MARINERS ENCOUNTER VOLCANIC ASH OR FLOATING VOLCANIC
DEBRIS YOU ARE ENCOURAGED TO REPORT THE OBSERVATION WITH THE
OCEAN PREDICTION CENTER BY CALLING 301-683-1520.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 42N TO 50N
BETWEEN 143W AND 161W AND FROM 43N TO 56N BETWEEN 161W AND 171W
AND FROM 57N TO 61N W OF 165W.
.24 HOUR FORECAST DENSE FOG FROM 42N TO 56N BETWEEN 143W AND
162W AND FROM 52N TO 62N BETWEEN 164W AND 177E AND FROM 40N TO
48N W OF 176E.
.48 HOUR FORECAST DENSE FOG FROM 44N TO 54N BETWEEN 135W AND
151W AND FROM 42N TO 47N BETWEEN 168W AND 174E AND FROM 40N TO
47N W OF 172E.

.FORECASTER HOLLEY. 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 TUE AUG 5.
24 HOUR FORECAST VALID 1800 UTC WED AUG 6.
48 HOUR FORECAST VALID 1800 UTC THU AUG 7.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM HENRIETTE NEAR 17.0N 125.6W 1003 MB AT 2100 UTC
AUG 05 MOVING WNW OR 295 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS
45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM N
SEMICIRCLE AND 50 NM S SEMICIRCLE. SEAS 4 M OR GREATER WITHIN
150 NM NE QUADRANT...60 NM SE QUADRANT...75 NM SW QUADRANT...AND
120 NM NW QUADRANT WITH SEAS TO 6.0 M. ELSEWHERE WITHIN 18N123W
TO 20N125W TO 19N127W TO 16N127W TO 15N126W TO 15N124W TO
18N123W WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0 M. REMAINDER OF AREA
WITHIN 18N121W TO 20N122W TO 20N127W TO 15N128W TO 13N124W TO
15N121W TO 18N121W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN
MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM HENRIETTE NEAR 17.9N 130.4W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. LITTLE CHANGE. RADIUS
OF TROPICAL STORM FORCE WINDS AND SEAS 4 M OR GREATER WITH SEAS
TO 5.5 M. ELSEWHERE WITHIN 19N128W TO 22N130W TO 22N132W TO
19N134W TO 18N134W TO 16N129W TO 19N128W WINDS 20 TO 33 KT. SEAS
2.5 TO 4.0 M. REMAINDER OF AREA WITHIN 23N129W TO 22N134W TO
18N135W TO 15N133W TO 15N128W TO 19N126W TO 23N129W WINDS 20 KT
OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM HENRIETTE NEAR 18.8N 136.3W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM N SEMICIRCLE AND 40 NM S SEMICIRCLE. SEAS 4 M
OR GREATER WITHIN 120 NM N SEMICIRCLE...60 NM SE QUADRANT...AND
90 NM SW QUADRANT WITH SEAS TO 5.0 M. ELSEWHERE WITHIN 20N134W TO
22N138W TO 21N139W TO 19N140W TO 17N138W TO 17N135W TO 20N134W
WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0 M. REMAINDER OF AREA WITHIN
22N132W TO 23N140W TO 17N140W TO 15N136W TO 18N133W TO 22N132W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SWELL.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

...GALE WARNING...
.LOW PRES...EP91...NEAR 09.5N91.5W 1010 MB. WITHIN 12N89W TO
13N89W TO 13N91W TO 12N92W TO 11N92W TO 11N89W TO 12N89W WINDS
20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LOW PRES...EP91...POSSIBLE TROPICAL CYCLONE...
NEAR 12.5N99W 1006 MB. WITHIN 14N93W TO 16N96W TO 16N98W TO
13N100W TO 12N94W TO 13N93W TO 14N93W...INCLUDING NEAR THE GULF
OF TEHUANTEPEC...WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.48 HOUR FORECAST LOW PRES...EP91...POSSIBLE TROPICAL CYCLONE...
NEAR 15N106.5W 1000 MB. WITHIN 15N105W TO 16N106W TO 15N107W TO
14N107W TO 14N106W TO 15N105W WINDS 30 TO 35 KT. SEAS TO 2.5 M.
ELSEWHERE WITHIN 17N100W TO 19N105W TO 19N107W TO 15N107W TO
15N104W TO 14N100W TO 17N100W...INCLUDING NEAR CABO CORRIENTES...
WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M.

.SYNOPSIS AND FORECAST.

.30 HOUR FORECAST WITHIN 02S103W TO 02S104W TO 03.4S107W TO
03.4S97W TO 02S103W WINDS 20 KT OR LESS. SEAS 2.5 M IN S TO SW
SWELL.
.48 HOUR FORECAST WITHIN 02N94W TO 06N102W TO 05N115W TO 01S109W
TO 03.4S113W TO 03.4S93W TO 02N94W WINDS 20 KT OR LESS. SEAS 2.5
M IN S TO SW SWELL.

.36 HOUR FORECAST WITHIN 11N86W TO 11N88W TO 10N88W TO 10N87W TO
11N86W...INCLUDING THE GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25
KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 2100 UTC TUE AUG 5...

.TROPICAL STORM HENRIETTE...NUMEROUS MODERATE ISOLATED STRONG
WITHIN 150 NM NW SEMICIRCLE.

.LOW PRES...EP91...NEAR 09.5N91.5W...WIDELY SCATTERED MODERATE
ISOLATED STRONG FROM 06N TO 16N BETWEEN 88W AND 99.5W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM ALONG BORDER OF COSTA RICA AND PANAMA TO
09N90W TO 13.5N120...THEN RESUMES SW OF HENRIETTE NEAR 14N128W
TO BEYOND 12N140W. SCATTERED MODERATE FROM 06N TO 11N BETWEEN
107.5W AND 116W...AND FROM 16N TO 20.5N BETWEEN 104W AND 109W.

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.