298
FZPN01 KWBC 092221
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC SAT AUG 09 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 09.
24 HOUR FORECAST VALID 1800 UTC AUG 10.
48 HOUR FORECAST VALID 1800 UTC AUG 11.

.WARNINGS.

...GALE WARNING...
.LOW 55N150W 1000 MB MOVING NE 20 KT. WITHIN 420 NM SE QUADRANT
WINDS 25 TO 35 KT. SEAS 2.5 TO 5 M.
.24 HOUR FORECAST LOW DISSIPATED INLAND. FROM 53N TO 58N E OF
140W WINDS TO 25 KT. SEAS 2.5 TO 4 M.
.30 HOUR FORECAST LOW DISSIPATED INLAND AND ASSOCIATED
CONDITIONS DIMINISHED.

...GALE WARNING...
.FROM 38N TO 43N BETWEEN 124W AND 129W AREA OF N WINDS 25 TO 35
KT. SEAS 2.5 TO 4 M. ELSEWHERE FROM 34N TO 42N BETWEEN 124W AND
132W AREA OF N TO NE WINDS 20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST OUT TO 360 NM NW OF A LINE FROM 35N130W TO
42N124W TO 45N124W AREA OF N TO NE WINDS 20 TO 30 KT. SEAS TO 3
M.
.48 HOUR FORECAST FROM 45N TO 51N BETWEEN 125W AND 131W AREA OF
N TO NW WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M. ELSEWHERE FROM 40N
TO 51N BETWEEN 125W AND 133W WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5
M.

...GALE WARNING...
.LOW W OF AREA NEAR 53N162E 1006 MB MOVING NE 15 KT. WITHIN 420
NM S QUADRANT...AND N OF 48N BETWEEN 168E AND 174E AREA OF SE
WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW NW OF AREA NEAR 58N172E 990 MB. N OF 52N
BETWEEN 177W AND 177E WINDS 25 TO 35 KT. SEAS 2.5 TO 3.5 M.
.48 HOUR FORECAST LOW NW OF AREA NEAR 59N179E 992 MB. WITHIN 480
NM E AND NE QUADRANTS WINDS 25 TO 35 KT. SEAS 2.5 TO 3.5 M.

...GALE WARNING...
.LOW 65N160W 997 MB NEARLY STATIONARY. WITHIN 300 NM W AND SW
QUADRANTS WINDS 25 TO 35 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 66N158W 1005 MB. CONDITIONS DIMINISHED.

.SYNOPSIS AND FORECAST.

.LOW 40N163W 1007 MB MOVING NE 20 KT. WITHIN 480 NM NE AND 420
NM SE QUADRANTS WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST LOW 50N158W 1011 MB. WITHIN 420 NM E AND SE
QUADRANTS WINDS 20 TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW 58N140W 1017 MB. WITHIN 300 NM S QUADRANT
WINDS TO 25 KT. SEAS TO 2.5 M.

.48 HOUR FORECAST LOW NEAR 47N171E 1003 MB. WITHIN 300 NM SE
SEMICIRCLE WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.

.KLYUCHEVSKOY VOLCANO 56.03N 160.38E CONTINUES TO ERUPT.
VOLCANIC ASH MAY BE REACHING THE SURFACE WITHIN 60 NM OF A LINE
WITHIN 60 NM OF A LINE
FROM 55N170E TO 51N177E TO 45N178E. MARINERS SHOULD EXERCISE
CAUTION. IF MARINERS ENCOUNTER VOLCANIC ASH OR FLOATING VOLCANIC
DEBRIS 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 N OF 38N W OF 172E.
.24 HOUR FORECAST DENSE FOG FROM 45N TO 54N BETWEEN 143W AND
160W...AND N OF 40N W OF 179W.
.48 HOUR FORECAST DENSE FOG FROM 45N TO 57N BETWEEN 135W AND
160W...AND FROM 42N TO 57N W OF 173W.

.FORECASTER ROWLAND. 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 9.
24 HOUR FORECAST VALID 1800 UTC SUN AUG 10.
48 HOUR FORECAST VALID 1800 UTC MON AUG 11.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM IVO NEAR 21.0N 113.5W 1003 MB AT 2100 UTC AUG 09
MOVING W OR 280 DEG AT 6 KT. MAXIMUM SUSTAINED WINDS 45 KT GUSTS
55 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM N SEMICIRCLE...40
NM SE QUADRANT AND 20 NM SW QUADRANT.  SEAS 4 M OR GREATER
WITHIN 30 NM NW AND SE QUADRANTS...45 NM NE QUADRANT AND 0 NM SW
QUADRANT WITH SEAS TO 4.5 M. ELSEWHERE WITHIN 22N113W TO 21N113W
TO 22N113W TO 21N114W TO 20N113W TO 21N113W TO 22N113W WINDS 20
TO 33 KT. SEAS 3.0 TO 3.5 M. REMAINDER OF AREA WITHIN 23N113W TO
22N114W TO 21N115W TO 20N114W TO 20N113W TO 21N112W TO 23N113W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN E TO SE SWELL.
.24 HOUR FORECAST TROPICAL STORM IVO NEAR 22.0N 116.5W. MAXIMUM
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS
WITHIN 20 NM OF CENTER EXCEPT 0 NM SW QUADRANT. SEAS 4 M OR
GREATER WITHIN 45 NM NE SEMICIRCLE...AND 0 NM SW SEMICIRCLE WITH
SEAS TO 4.0 M. ELSEWHERE WITHIN 23N116W TO 23N117W TO 22N117W TO
22N116W TO 23N116W WINDS 20 TO 33 KT. SEAS 3.0 TO 3.5 M.
REMAINDER OF AREA WITHIN 24N115W TO 23N117W TO 21N117W TO 21N116W
TO 22N115W TO 24N115W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN
E TO SE SWELL.
.36 HOUR FORECAST POST-TROPICAL REMNANT LOW IVO NEAR 22.5N
118.5W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. SEAS TO 3.0 M.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW IVO NEAR 22.8N
120.6W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. WITHIN 24N120W
TO 24N121W TO 23.5N121W TO 23N121.5W TO 23.5N120.5W TO 23N119.5W
TO 24N120W WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M IN SE SWELL.
ELSEWHERE WITHIN 24N119W TO 25N120W TO 24N120W TO 23N121W TO
23N120W TO 24N119W WINDS 20 KT OR LESS. SEAS 2.5 M IN SE TO S
SWELL.

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

.SYNOPSIS AND FORECAST.

.WITHIN 06N121W TO 10N123W TO 05N130W TO 03.4S120W TO 01S116W TO
03.4S109W TO 06N121W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S
TO SW SWELL.
.24 HOUR FORECAST WITHIN 09N129W TO 07N131W TO 03N128W TO
01N127W TO 03S119W TO 03.4S112W TO 09N129W WINDS 20 KT OR LESS.
SEAS 2.5 M IN S TO SW SWELL.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.30 HOUR FORECAST WITHIN 30N131W TO 30N139W TO 29.5N137W TO
30N131.5W TO 30N131W WINDS 20 KT OR LESS. SEAS 2.5 M IN NE
SWELL.
.48 HOUR FORECAST WITHIN 30N134W TO 30N140W TO 29N140W TO
29N137W TO 30N134W WINDS 20 KT OR LESS. SEAS 2.5 M IN NE SWELL.

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

CONVECTION VALID AT 2100 UTC SAT AUG 9...

.TROPICAL STORM IVO...NUMEROUS MODERATE WITHIN 30 NM N AND 60 NM
S SEMICIRCLES. SCATTERED MODERATE ISOLATED STRONG ELSEWHERE FROM
15N TO 21.5N BETWEEN 108W AND 116W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 1010 MB LOW PRES NEAR 10.5N74.5W TO 08N90W
TO 14N111W TO 08.5N131W TO BEYOND 12N140W. SCATTERED MODERATE
ISOLATED STRONG CONVECTION FROM 03.5N TO 09N E OF 89W...FROM 06N
TO 11.5N BETWEEN 89W AND 99W...FROM 06.5N TO 11N BETWEEN 99W AND
108W...FROM 10N TO 16.5N BETWEEN 106W AND 121W...AND FROM 06.5N
TO 13.5N BETWEEN 124W AND 136W.

$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.