High Seas Forecast
Issued by NWS
Issued by NWS
711 FZPN02 KWBC 082325 HSFEPI HIGH SEAS FORECAST FOR METAREA XII NWS OCEAN PREDICTION CENTER WASHINGTON DC 2345 UTC FRI AUG 08 2025 CCODE/1:31:12:01:00/AOW+POR/NWS/CCODE SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 1800 UTC AUG 08. 24 HOUR FORECAST VALID 1800 UTC AUG 09. 48 HOUR FORECAST VALID 1800 UTC AUG 10. .WARNINGS. ...GALE WARNING... .LOW 49N161W 990 MB MOVING NE 15 KT. WITHIN 180 NM S AND 420 NM E QUADRANTS AND WITHIN 240 NM SE OF A FRONT FROM 49N157W TO 44N160W TO 40N165W WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M...HIGHEST NEAR 46N157W. ELSEWHERE WITHIN 840 NM SW SEMICIRCLE...660 NM E AND 300 NM N QUADRANTS WINDS TO 25 KT. SEAS TO 3.5 M...HIGHEST SW OF LOW NEAR 42N170W. .24 HOUR FORECAST LOW 54N152W 997 MB. WITHIN 240 NM S AND 480 NM SE QUADRANTS WINDS 25 TO 35 KT. SEAS 3 TO 5 M...HIGHEST NEAR 48N151W. ELSEWHERE N OF 49N BETWEEN 132W AND 157W AND WITHIN 240 NM E OF A LINE FROM 49N152W TO 42N158W WINDS TO 25 KT. SEAS 2.5 TO 4 M...EXCEPT N OF 56N SEAS TO 2.5 M. .48 HOUR FORECAST LOW 60N141W 1011 MB. WITHIN 420 NM SE AND S QUADRANTS WINDS TO 25 KT. SEAS 2.5 TO 4 M...HIGHEST NEAR 55N137W. ...GALE WARNING... .FROM 33N TO 43N BETWEEN 123W AND 130W AREA OF N TO NW WINDS 20 TO 30 KT. SEAS TO 3.5 M...HIGHEST NEAR 40N126W. .06 HOUR FORECAST FROM 40N TO 43N BETWEEN 124W AND 127W AREA OF N WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M. .24 HOUR FORECAST FROM 41N TO 43N BETWEEN 124W AND 127W AREA OF N WINDS 25 TO 35 KT. SEAS 3 TO 4.5 M...HIGHEST NEAR 41N126W. ELSEWHERE BETWEEN 123W AND A LINE FROM 44N127W TO 42N130W TO 33N137W WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M. .48 HOUR FORECAST WITHIN AN AREA BOUNDED BY A LINE FROM 50N128W TO 33N142W TO 34N129W TO 43N124W TO 49N127W TO 50N128W AREA OF N WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M...HIGHEST NEAR 40N129W. .SYNOPSIS AND FORECAST. .FROM 47N TO 52N W OF 167E AREA OF SE WINDS TO 25 KT. SEAS TO 3 M. .24 HOUR FORECAST N OF 46N BETWEEN 172E AND 165E AREA OF S TO SE WINDS TO 25 KT. SEAS TO 2.5 M. .48 HOUR FORECAST NEW LOW NW OF AREA 58N171E 991 MB. WITHIN 420 NM E AND 240 NM S QUADRANTS AND FROM 46N TO 55N BETWEEN 180W AND 175E WINDS 20 TO 30 KT. SEAS TO 3 M. .LOW 64N166W 1002 MB MOVING NE 10 KT. N OF 63N BETWEEN 167W AND 171W AREA OF N TO NW WINDS 20 TO 30 KT. SEAS TO 2.5 M. .24 HOUR FORECAST LOW INLAND NEAR 65N158W 999 MB. N OF 61N BETWEEN 163W AND 171W AREA OF NW WINDS 20 TO 30 KT. SEAS TO 3 M. .48 HOUR FORECAST LOW WELL INLAND. CONDITIONS DIMINISHED. .DISSIPATING FRONT EXTENDS FROM 54N132W TO 49N129W. E OF FRONT WINDS 20 TO 30 KT. SEAS LESS THAN 2.5 M. .24 HOUR FORECAST CONDITIONS DIMINISHED. .24 HOUR FORECAST NEW COMPLEX LOW WITH MEAN CENTER 39N163W 1007 MB. WITHIN 420 NM SE SEMICIRCLE WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M. .48 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 49N157W 1011 MB AND SECOND CENTER NEAR 38N162W 1008 MB. WITHIN 480 NM E AND SE QUADRANTS OF FIRST CENTER AND WITHIN 420 NM SE SEMICIRCLE OF SECOND CENTER WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M...HIGHEST NEAR 38N161W. .KLYUCHEVSKOY VOLCANO 56.03N 160.38E CONTINUES TO ERUPT. VOLCANIC ASH MAY BE REACHING THE SURFACE WITHIN 60 NM OF A LINE FROM 55N171E 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 301-683-1320. .DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 45N TO 52N BETWEEN 133W AND 162W...AND W OF A LINE FROM 40N172E TO 51N163E. .24 HOUR FORECAST DENSE FOG WITHIN 180 NM SE OF A LINE FROM 54N134W TO 53N151W...AND N OF 39N W OF 171E. .48 HOUR FORECAST DENSE FOG WITHIN 300 NM E OF A LINE FROM 54N151W TO 50N156W TO 44N156W...FROM 47N TO 57N BETWEEN 178E AND 170E AND FROM 40N TO 47N W OF 176E. .FORECASTER BANCROFT. 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 FRI AUG 8. 24 HOUR FORECAST VALID 1800 UTC SAT AUG 9. 48 HOUR FORECAST VALID 1800 UTC SUN AUG 10. .WARNINGS. ...TROPICAL STORM WARNING... .TROPICAL STORM IVO NEAR 20.4N 111.2W 999 MB AT 2100 UTC AUG 08 MOVING W OR 275 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM OF CENTER EXCEPT 20 NM SW QUADRANT. SEAS 4 M OR GREATER WITHIN 30 NM NW AND SE QUADRANTS...75 NM NE QUADRANT AND 0 NM SW QUADRANT WITH SEAS TO 5.0 M. ELSEWHERE WITHIN 21N110.5W TO 21N111.5W TO 20N111.5W TO 20N110.5W TO 21N110.5W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M. REMAINDER OF AREA WITHIN 22N108W TO 23N109W TO 23N111W TO 21N112W TO 20N112W TO 20N109W TO 22N108W WINDS 20 KT OR LESS SEAS 2.5 TO 3.0 M IN SE TO S SWELL. .24 HOUR FORECAST TROPICAL STORM IVO NEAR 20.7N 114.0W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. LITTLE CHANGE IN TROPICAL STORM FORCE WINDS. SEAS 4 M OR GREATER WITHIN 75 NM NE QUADRANT...30 NM SE QUADRANT...0 NM SW QUADRANT AND 45 NM NW QUADRANT WITH SEAS TO 5.0 M. ELSEWHERE WITHIN 21N113.5W TO 21N114.5W TO 20.5N114.5W TO 20.5N114W TO 20.5N113.5W TO 21N113.5W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M. REMAINDER OF AREA WITHIN 22N112W TO 23N113W TO 22N115W TO 21N115W TO 20N113W TO 21N112W TO 22N112W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN E TO SE SWELL. .48 HOUR FORECAST TROPICAL STORM IVO NEAR 21.5N 117.5W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM N SEMICIRCLE AND 20 NM S SEMICIRCLE. SEAS LESS THAN 4 M. ELSEWHERE WITHIN 22N117W TO 22N118W TO 21.5N118W TO 21.5N117.5W TO 21.5N117W TO 22N117W WINDS 20 TO 33 KT. SEAS 3.0 TO 3.5 M. REMAINDER OF AREA WITHIN 22N115W TO 23N116W TO 23N118W TO 22N118W TO 20N117W TO 20N115W TO 22N115W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN E TO SE 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. .GULF OF CALIFORNIA WITHIN 31N113W TO 31N114W TO 30N114W TO 30N113W TO 31N113W SE TO S WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M. .06 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M. .WITHIN 21N137W TO 23N138W TO 24N140W TO 09N140W TO 19N139W TO 21N137W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN MIXED E AND SW SWELL. .18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M. .WITHIN 10N113W TO 11N121W TO 05N124W TO 05N120W TO 04N118W TO 05N114W TO 10N113W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S TO SW SWELL. .24 HOUR FORECAST WITHIN 07N120W TO 09N126W TO 04N129W TO 00N128W TO 01N124W TO 03.4S108W TO 07N120W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S TO SW SWELL. .48 HOUR FORECAST WITHIN 08N129W TO 09N129W TO 08N130W TO 07N131W TO 06N131W TO 07N130W TO 08N129W WINDS 20 KT OR LESS. SEAS 2.5 M IN S TO SW SWELL. .WITHIN 03S119W TO 02.5S120W TO 03.4S120W TO 03.4S118.5W TO 03S118.5W TO 03S119W WINDS 20 KT OR LESS. SEAS 2.5 M IN S TO SW SWELL. .24 HOUR FORECAST CONDITIONS TO MERGE WITH AREA OF S TO SW SWELL DESCRIBED ABOVE. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M. CONVECTION VALID AT 2040 UTC FRI AUG 8... .TROPICAL STORM IVO...NUMEROUS STRONG WITHIN 60 NM W AND 30 NM E SEMICIRCLES. SCATTERED MODERATE TO STRONG ELSEWHERE FROM 16N TO 23N BETWEEN 105W AND 113W. .INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... MONSOON TROUGH FROM 1010 MB LOW PRESSURE NEAR 10N77W TO 07N92W TO 14.5N112W TO 06.5N130 TO 11.5N13840W TO 11N140W. SCATTERED MODERATE CONVECTION FROM 03N TO 07N E OF 90W...FROM 06N TO 09N BETWEEN 92W AND 102W...FROM 07.5N TO 13.5N BETWEEN 107W AND 115W...AND FROM 10N TO 12N W OF 137W. $$ .FORECASTER STRIPLING. NATIONAL HURRICANE CENTER. NATIONAL WEATHER SERVICE HONOLULU HI NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E SYNOPSIS VALID 1800 UTC AUG 08 2025. 24 HOUR FORECAST VALID 1800 UTC AUG 09 2025. 48 HOUR FORECAST VALID 1800 UTC AUG 10 2025. .WARNINGS. ...TROPICAL STORM WARNING... .POST-TROPICAL CYCLONE HENRIETTE NEAR 19.9N 143.0W 1009 MB AT 2100 UTC AUG 08 MOVING W OR 280 DEG AT 15 KT. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM NE QUADRANT AND 45 NM SE QUADRANT AND 60 NM W SEMICIRCLE. SEAS 4 M OR GREATER OVER FORECAST WATERS WITHIN 90 NM N SEMICIRCLE...AND 60 NM ELSEWHERE. ELSEWHERE OVER FORECAST WATERS WINDS 20 TO 33 KT AND SEAS 2.5 TO 4 M WITHIN 180 NM OF LOW. .24 HOUR FORECAST POST-TROPICAL REMNANT LOW HENRIETTE NEAR 21.9N 147.5W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WINDS 20 TO 30 KT WITHIN 150 NM OF N SEMICIRCLE OF LOW. SEAS 2.5 TO 4 M WITHIN 180 NM OF N SEMICIRCLE OF LOW. .48 HOUR FORECAST TROPICAL STORM HENRIETTE NEAR 25.0N 152.0W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM NE QUADRANT...30 NM SE QUADRANT...0 NM SW QUADRANT...AND 40 NM NW QUADRANT. WINDS 20 TO 30 KT ELSEWHERE WITHIN 120 NM OF N SEMICIRCLE AND WITHIN 90 NM OF S SEMICIRCLE. SEAS 4 M OR GREATER WITHIN 90 NM OF LOW. FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE AND INTENSITY. SEE LATEST BULLETIN FROM CPHC UNDER WMO HEADER WTPA23 PHFO FOR ADDITIONAL DETAILS. .SYNOPSIS AND FORECAST. .TROUGH 30N165W 25N166W MOVING W SLOWLY. ISOLATED MODERATE TSTMS WITHIN 120 NM E OF TROUGH N OF 26N. .24 HOUR FORECAST TROUGH 30N166W 22N170W. .48 HOUR FORECAST TROUGH 26N172W 20N176W. .TROUGH 25N172E 22N174E 18N172E MOVING NW 15 KT. SCATTERED MODERATE TSTMS WITHIN 180 NM OF TROUGH. .24 HOUR FORECAST TROUGH 27N171E 23N173E 19N171E. .48 HOUR FORECAST TROUGH DISSIPATED. .WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA. .SEAS 2.5 TO 3 M WITHIN 120 NM OF LINE 15N180W 08N170W .24 HOUR FORECAST SEAS LOWERED TO 2.5 M OR LESS OTHER THAN SEAS DESCRIBED IN WARNING SECTION ABOVE. .SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA. .ITCZ 10N145W 05N175W 03N165E 02N160E. ISOLATED MODERATE TSTMS WITHIN 120 NM OF ITCZ BETWEEN 180W AND 170W. .SCATTERED MODERATE TSTMS S OF 05N W OF 175E. $$ .FORECASTER PECHACEK. HONOLULU HI.