North Pacific High Seas Forecast

FZPN01 KWBC 311553
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1630 UTC SUN AUG 31 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 1200 UTC AUG 31. 
24 HOUR FORECAST VALID 1200 UTC SEP 01. 
48 HOUR FORECAST VALID 1200 UTC SEP 02. 

.WARNINGS. 

...GALE WARNING... 
.LOW 57N179W 984 MB NEARLY STATIONARY WILL MOVE NE 
AFTER 24 HOURS. WITHIN 240 NM SW QUADRANT...AND WITHIN 180
NM NE AND E OF A FRONT EXTENDING FROM 64N170W TO 61N166W 
TO 55N166W TO 50N166W WINDS 25 TO 35 KT. SEAS 3 TO 5 M. 
ELSEWHERE N OF 47N BETWEEN 158W AND 168E...AND WITHIN 
150 NM E AND SE OF A FRONT EXTENDING FROM 47N167W TO
39N174W WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 57N179E 
990 MB. WITHIN 180 NM OF MAIN CENTER...EXCEPT NE 
QUADRANT...WINDS 25 TO 35 KT. SEAS 3 TO 5 M. 
ELSEWHERE N OF 51N BETWEEN 155W AND 170W WINDS TO 25 
KT. SEAS TO 3 M. 
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 61N172W
1002 MB. WITHIN 240 NM NE QUADRANT...AND WITHIN 300 NM 
S AND SE SEMICIRCLES WINDS 20 TO 30 KT. SEAS 2.5 TO 
4.5 M. 

...GALE WARNING...
.LOW 37N161E 1007 MB MOVING E 25 KT WILL TURN NE AFTER
24 HOURS. WITHIN 180 NM E AND NE QUADRANTS WINDS 20 TO 
30 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 37N176E 1003 MB. WITHIN 180 NM OF 
LOW CENTER...EXCEPT 240 NM E AND NE QUADRANTS...WINDS 
25 TO 35 KT. SEAS 3 TO 4 M. ELSEWHERE FROM 31N TO 42N
BETWEEN 167W AND 162E WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW 42N172W 1001 MB. WITHIN 540 NM N 
AND NE...300 NM SE AND NW...AND 240 NM SW QUADRANTS WINDS
30 TO 45 KT. SEAS 3.5 TO 5.5 M. ELSEWHERE FROM 37N TO 52N
BETWEEN 160W AND 178W WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M. 

...GALE WARNING...
.48 HOUR FORECAST LOW W OF AREA NEAR 45N156E 1000 MB. 
FROM 39N TO 47N BETWEEN 165E AND 160E WINDS 25 TO 35 KT. 
SEAS 2.5 TO 4 M.

.SYNOPSIS AND FORECAST. 

.COMPLEX LOW WITH MEAN CENTER 36N179E 1009 MB MOVING NE 
15 KT WITH A FRONT EXTENDING FROM 35N166E TO MEAN CENTER
TO 39N174W. WITHIN 240 NM E AND SE OF FRONT...AND WITHIN
240 NM W AND NW QUADRANTS...WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 39N173W 1010 MB WITH CONDITIONS 
DESCRIBED WITH LOW 37N176E IN WARNINGS SECTION ABOVE.
.48 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW 
42N172W IN WARNINGS SECTION ABOVE.

.COMPLEX LOW WITH MAIN CENTER 37N154W 1004 MB MOVING E
10 KT WILL BECOME STATIONARY AFTER 24 HOURS. FROM 32N
TO 43N BETWEEN 141W AND 161W WINDS 20 TO 30 KT. SEAS 
2.5 TO 4 M. 
.24 HOUR FORECAST LOW 37N150W 1007 MB. FROM 31N TO 46N
BETWEEN 141W AND 155W WINDS 20 TO 30 KT. SEAS 2.5 TO TO
3.5 M. 
.48 HOUR FORECAST LOW 37N150W 1010 MB. FROM 32N TO 45N
BETWEEN 141W AND 154W WINDS 20 TO 30 KT. SEAS 2.5 TO 
3.5 M. 

.N OF 52N E OF 139W AREA OF NW TO N WINDS TO 25 KT. 
SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST FROM 48N TO 58N BETWEEN 129W AND 
138W AREA OF NW TO N WINDS 20 TO 30 KT. SEAS TO 3 M. 
.48 HOUR FORECAST FROM 47N TO 59N BETWEEN 133W AND 
141W AREA OF NW TO N WINDS 20 TO 30 KT. SEAS TO 3 M.

.FROM 32N TO 39N BETWEEN 121W AND 125W AREA OF NW TO
N WINDS TO 25 KT. SEAS TO 2.5 M. 
.24 HOUR FORECAST FROM 32N TO 43N BETWEEN 121W AND 
126W AREA OF NW TO N WINDS TO 25 KT. SEAS TO 2.5 M. 
.48 HOUR FORECAST FROM 36N TO 43N BETWEEN 122W AND 
127W AREA OF NW TO N WINDS 20 TO 30 KT. SEAS TO 2.5 M. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM NW OF A LINE
FROM 56N176W TO 61N168W OVER THE BERING SEA...AND WITHIN 
120 NM E AND NE OF A LINE FROM 43N170W TO 51N167W.
.24 HOUR FORECAST DENSE FOG N OF 48N BETWEEN 154W AND 
162W...AND WITHIN 120 NM OF 39N178E.
.48 HOUR FORECAST DENSE FOG FROM 43N TO 52N BETWEEN 155W
AND 170W...AND FROM 41N TO 45N BETWEEN 164E AND 160E.  

.FORECASTER MILLS. 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 1200 UTC SUN AUG 31.
24 HOUR FORECAST VALID 1200 UTC MON SEP  1.
48 HOUR FORECAST VALID 1200 UTC TUE SEP  2.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM KIKO NEAR 14.4N 123.1W 1007 MB AT 1500 UTC AUG
31 MOVING W OR 270 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 40 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM N
SEMICIRCLE AND 0 NM S SEMICIRCLE. ELSEWHERE WITHIN 16N122W TO 
17N123W TO 16N125W TO 15N125W TO 14N123W TO 15N122W TO 16N122W 
WINDS 20 TO 33 KT. SEAS 2.5 TO 3.0 M. 
.24 HOUR FORECAST TROPICAL STORM KIKO NEAR 14.4N 126.1W. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS 
WITHIN 30 NM NE QUADRANT...10 NM SE QUADRANT...0 NM SW 
QUADRANT...AND 20 NM NW QUADRANT. SEAS 4.0 M OR GREATER WITHIN 
30 NM N SEMICIRCLE AND 0 NM S SEMICIRCLE WITH SEAS TO 4.0 M. 
ELSEWHERE WITHIN 15N125.5W TO 15.5N126W TO 15N126.5W TO 14.5N126W
TO 14.5N125.5W TO 15N125.5W WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0 
M. REMAINDER AREA WITHIN 18N126W TO 17N127W TO 15N128W TO 14N126W
TO 15N124W TO 18N126W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN 
MIXED SWELL.
.48 HOUR FORECAST HURRICANE KIKO NEAR 14.2N 129.4W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS 
WITHIN 30 NM S SEMICIRCLE...50 NM NE QUADRANT AND 40 NM NW 
QUADRANT. SEAS 4 M OR GREATER WITHIN 60 NM NW SEMICIRCLE AND 15 
NM SE SEMICIRCLE WITH SEAS TO 4.5 M. ELSEWHERE WITHIN 16N129W TO 
17N131W TO 15N131W TO 14N130W TO 14N129W TO 16N129W WINDS 20 TO 
33 KT. SEAS 3.0 TO 4.0 M. REMAINDER AREA WITHIN 17N128W TO 
18N131W TO 17N132W TO 15N131W TO 13N129W TO 16N128W TO 17N128W 
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.

.SYNOPSIS AND FORECAST.

.WITHIN 08N103W TO 06N111W TO 03.4S120W TO 03.4S87W TO
08N103W...EXCEPT LEE OF GALAPAGOS ISLANDS... WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN S TO SW SWELL.
.24 HOUR FORECAST WITHIN 07N101W TO 07N108W TO 00N123W TO
03.4S120W TO 03.4S99W TO 07N101W WINDS 20 KT OR LESS. SEAS 2.5
TO 3.0 M IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 11N107W TO 08N114W TO 03.4S120W TO
03.4S97W TO 11N107W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S
TO SW SWELL.

.06 HOUR FORECAST WITHIN 15N96W TO 16N98W TO 16N100W TO 14N100W
TO 14N99W TO 14N97W TO 15N96W E TO SE WINDS 20 TO 25 KT. SEAS
2.5 TO 3.0 M.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
16N104W 1009 MB. WITHIN 17N101W TO 18N103W TO 18N104W TO 16N104W
TO 16N102W TO 16N100W TO 17N101W WINDS 20 TO 25 KT. SEAS 2.5 TO 
3.0 M.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
17.5N108.5W 1008 MB. WITHIN 19N104W TO 20N106W TO 19N109W TO 
17N108W TO 18N105W TO 19N104W WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0
M.

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

CONVECTION VALID AT 1500 UTC SUN AUG 31...

.TROPICAL STORM KIKO...NUMEROUS MODERATE TO STRONG FROM 13N TO 
17N 
BETWEEN 122W AND 127W. 

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N85W TO 12N91W TO 11N110W TO 13N115W. 
SCATTERED MODERATE ISOLATED STRONG FROM 04N TO 07N E OF 
89W...FROM 08N TO 16.5N BETWEEN 95W AND 105W...AND FROM 08N TO 
12N BETWEEN 130W AND 140W.

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.