124
FZPN02 KWBC 170525
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0545 UTC SUN AUG 17 2025

CCODE/1:31:12:01:00/AOW+POR/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 17.
24 HOUR FORECAST VALID 0000 UTC AUG 18.
48 HOUR FORECAST VALID 0000 UTC AUG 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COMPLEX LOW WITH MEAN CENTER 58N140W 996 MB NEARLY STATIONARY.
WITHIN 300 NM SW OF A LINE FROM 53N137W TO 56N146W TO
60N151W...AND FROM 51N TO 57N E OF 135W WINDS 20 TO 30 KT. SEAS
TO 2.5 TO 4 M. ELSEWHERE WITHIN 720 NM NE OF A LINE FROM 40N131W
TO 48N150W TO 55N158W WINDS TO 25 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 55N143W 1007 MB.
FROM 44N TO 52N BETWEEN 136W AND 149W WINDS TO 25 KT. SEAS TO 3
M.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

.COMPLEX LOW WITH MEAN CENTER 45N174E 1014 MB MOVING NE 20 KT.
FROM 40N TO 46N BETWEEN 177W AND 177E WINDS TO 25 KT. SEAS TO
2.5 M.
.24 HOUR FORECAST LOW 53N179W 1014 MB. CONDITIONS DIMINISHED.

.24 HOUR FORECAST FROM 32N TO 37N BETWEEN 119W AND 123W WINDS 20
TO 30 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST FROM 31N TO 37N BETWEEN 119W AND 122W. WINDS
TO 25 KT. SEAS TO 2.5 M.

.24 HOUR FORECAST LOW NW OF AREA 52N155E 1002 MB. N OF 46N W OF
166E WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LOW NW OF AREA 55N161E 1001 MB. N OF 51N
BETWEEN 173E AND 168E WINDS TO 25 KT. SEAS TO 2.5 M.

.48 HOUR FORECAST N OF 64N W OF 166W WINDS TO 25 KT. SEAS LESS
THAN 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 43N TO 53N
BETWEEN 161W AND 172E.
.24 HOUR FORECAST DENSE FOG FROM 46N TO 55N BETWEEN 162W AND
177E...AND FROM 42N W OF 164E.
.48 HOUR FORECAST DENSE FOG FROM 47N TO 52N BETWEEN 154W AND
169W...AND N OF 43N BETWEEN 170E AND 163E.

.FORECASTER POCHE. 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 0000 UTC SUN AUG 17.
24 HOUR FORECAST VALID 0000 UTC MON AUG 18.
48 HOUR FORECAST VALID 0000 UTC TUE AUG 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 08N129W TO 06N140W TO 02N140W TO 02N130W TO 08N129W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN SE SWELL.
.24 HOUR FORECAST WITHIN 07N137W TO 09N140W TO 05N140W TO
06N139W TO 07N137W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN SE
TO S SWELL.
.30 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.WITHIN 02S113W TO 01S120W TO 03.4S120W TO 03S111W TO 02S113W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S TO SW SWELL.
.24 HOUR FORECAST WITHIN 02S113W TO 02S120W TO 03.4S120W TO
03S98W TO 02S113W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S
SWELL.
.48 HOUR FORECAST WITHIN 02S104W TO 01S111W TO 03S120W TO
03.4S120W TO 03.4S95W TO 02S104W 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 0240 UTC SUN AUG 17...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N86W TO 09N105W TO 14N115W TO 12N125W. ITCZ
FROM 12N125W TO BEYOND 09N140W. SCATTERED MODERATE FROM 08N TO
10N BETWEEN 83W AND 85W...AND FROM 07N TO 09N BETWEEN 93W AND
96W. SCATTERED MODERATE TO ISOLATED STRONG FROM 10N TO 13N
BETWEEN 110W AND 115W.

$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 0000 UTC AUG 17 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 18 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 19 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N171W 25N169W MOVING W SLOWLY. SCATTERED MODERATE TSTMS
N
OF 25N BETWEEN 171W AND 162W.
.24 HOUR FORECAST TROUGH 30N168W 24N169W.
.48 HOUR FORECAST TROUGH 30N171W 26N172W.

.TROUGH 30N178E 24N173E NEARLY STATIONARY. ISOLATED MODERATE
TSTMS FROM 25N TO 20N W OF 164E.
.24 HOUR FORECAST TROUGH 30N176E 25N171E.
.48 HOUR FORECAST TROUGH 30N174E 25N169E.

.TROUGH 27N166E 25N163E 20N160E MOVING NW 10 KT. SCATTERED
MODERATE TSTMS FROM 27N TO 21N BETWEEN 165E AND 175E. ISOLATED
MODERATE TSTMS FROM 22N TO 18N W OF 164E.
.24 HOUR FORECAST TROUGH 28N162E 24N160E.
.48 HOUR FORECAST TROUGH 30N161E 25N160E.

.TROUGH 27N147W 21N148W 15N149W MOVING W 10 KT.
.24 HOUR FORECAST WEAK TROUGH 27N153W 18N154W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 11N160E 08N160E MOVING W 15 KT. ISOLATED MODERATE TSTMS
FROM 12N TO 03N W OF 165E.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.

.WINDS 20 KT OR LESS AND SEAS 2.5 M OR LOWER OVER REMAINDER
OF FORECAST AREA.

.ITCZ 09N141W 07N169W 08N179W 08N166E. SCATTERED MODERATE
TSTMS FROM 14N TO 04N BETWEEN 169E AND 171W. ISOLATED
MODERATE TSTMS ELSEWHERE WITHIN 240 NM OF ITCZ E OF 170W.

.ISOLATED MODERATE TSTMS N OF 28N BETWEEN 169W AND 167W.

$$

.FORECASTER TROTTER. HONOLULU HI.