801
FZPN02 KWBC 181125
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1145 UTC MON AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC AUG 18.
24 HOUR FORECAST VALID 0600 UTC AUG 19.
48 HOUR FORECAST VALID 0600 UTC AUG 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 50N136W 1009 MB MOVING NE 10 KT. FROM 42N TO 51N BETWEEN
138W AND 149W WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 52N132W 1011 MB. FROM 48N TO 55N E OF 133W
WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LOW DISSIPATED INLAND AND CONDITIONS
DIMINISHED.

.LOW NW OF AREA 53N157E 1001 MB MOVING NE 15 KT. N OF 44N
BETWEEN 169E AND 163E WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LOW NW OF AREA 58N165E 1003 MB. N OF 50N
BETWEEN 175E AND 167E WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW NW OF AREA 64N178E 1004 MB. N OF 56N
BETWEEN 174W AND 179E WINDS TO 25 KT. SEAS TO 2.5 M.

.FROM 32N TO 37N BETWEEN 119W AND 123W WINDS TO 25 KT. SEAS TO
2.5 M.
.24 HOUR FORECAST S OF 37N BETWEEN 119W AND 123W WINDS TO 25 KT.
SEAS TO 2.5 M.
.48 HOUR FORECAST S OF 40N BETWEEN 118W AND 125W WINDS TO 25 KT.
SEAS TO 2.5 M.

.24 HOUR FORECAST LOW 52N159W 1006 MB. FROM 44N TO 55N BETWEEN
152W AND 171W WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LOW 50N150W 1008 MB. FROM 41N TO 52N BETWEEN
140W AND 164W WINDS TO 25 KT. SEAS TO 2.5 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 45N TO 54N
BETWEEN 161W AND 180W...AND N OF 43N W OF 166E.
.24 HOUR FORECAST DENSE FOG FROM 47N TO 51N BETWEEN 151W AND
162W...AND N OF 43N BETWEEN 170E AND 166E.
.48 HOUR FORECAST DENSE FOG FROM 48N TO 50N BETWEEN 143W AND
146W...AND WITHIN 120 NM SE AND E OF A LINE FROM 55N178E TO
50N173E TO 45N165E.

.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 0600 UTC MON AUG 18.
24 HOUR FORECAST VALID 0600 UTC TUE AUG 19.
48 HOUR FORECAST VALID 0600 UTC WED AUG 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 02S103W TO 03S119W TO 03.4S120W TO 03.4S94W TO 02S103W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN SE TO S SWELL.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WITHIN 01S104W TO 01S120W TO 03.4S120W TO
03.4S94W TO 01S104W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN SE
TO S SWELL.

.WITHIN 11N139W TO 12N140W TO 06N140W TO 07N139W TO 09N138W TO
11N139W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN SE SWELL.
.12 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.12 HOUR FORECAST WITHIN 07N107W TO 06N110W TO 05N115W TO
03N115W TO 03N110W TO 05N108W TO 07N107W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN S TO SW SWELL.
.24 HOUR FORECAST WITHIN 07N107W TO 07N112W TO 06N117W TO
04N116W TO 05N109W TO 07N107W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN S SWELL.
.48 HOUR FORECAST WITHIN 07N111W TO 08N116W TO 07N129W TO
04N132W TO 04N125W TO 03N114W TO 07N111W 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 0840 UTC MON AUG 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N85W TO 13N135W TO 11N140W. SCATTERED
MODERATE TO ISOLATED STRONG FROM 09N TO 11N BETWEEN 83W AND 85W.
SCATTERED MODERATE TO ISOLATED STRONG N OF 09N BETWEEN 85W AND
88W...N OF 12N BETWEEN 88W AND 94W...AND N OF 15N BETWEEN 97W
AND 105W. SCATTERED MODERATE FROM 09N TO 12N BETWEEN 100W AND
110W...AND FROM 17N TO 20N BETWEEN 111W AND 116W.

$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI

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

SYNOPSIS VALID 0600 UTC AUG 18 2025.
24 HOUR FORECAST VALID 0600 UTC AUG 19 2025.
48 HOUR FORECAST VALID 0600 UTC AUG 20 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N167W 26N170N NEARLY STATIONARY. SCATTERED MODERATE
TSTMS
WITHIN 90 NM OF TROUGH. ISOLATED MODERATE TSTMS ELSEWHERE N 0F 25N
BETWEEN 170W AND 165W.
.24 HOUR FORECAST TROUGH 30N171W 26N172W.
.48 HOUR FORECAST TROUGH 30N172W 26N173W.

.TROUGH 30N176E 25N175E MOVING W 10 KT. ISOLATED MODERATE TSTMS N
OF 26N BETWEEN TROUGH AND 178W.
.24 HOUR FORECAST TROUGH 30N171E 28N170E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 30N161E 23N163E NEARLY STATIONARY. ISOLATED MODERATE TSTMS
N OF 24N BETWEEN TROUGH AND 170E.
.24 HOUR FORECAST TROUGH 30N163E 24N164E.
.48 HOUR FORECAST TROUGH 30N163E 26N162E.

.TROUGH 26N155W 22N155W MOVING W 15 KT.
.24 HOUR FORECAST TROUGH 26N162W 20N162W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.24 HOUR FORECAST NEW TROUGH 11N155W 07N156W. WINDS 20 TO 25 KT
WITHIN 60 NM OF TROUGH N OF 09N.
.48 HOUR FORECAST TROUGH 12N160W 08N161W. WINDS 20 TO 25 KT WITHIN
90 NM OF TROUGH N OF 10N.

.SEAS 2.5 TO 3 M FROM 10N TO 14N BETWEEN 155W AND 150W.
.24 HOUR FORECAST SEAS DIMINISHED TO 2.5 M OR LESS.
.48 HOUR FORECAST SEAS 2.5 M TO 3 M FROM 10N TO 15N BETWEEN 163W
AND
158W.

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

.ITCZ 10N140W 08N160W 03N177E. ISOLATED MODERATE TSTMS WITHIN 210
NM
OF ITCZ.

.ISOLATED MODERATE TSTMS FROM 04N TO 08N W OF 165E.

$$

.FORECASTER SHIGESATO. HONOLULU HI.