High Seas Forecast
Issued by NWS
Issued by NWS
489 FZPN02 KWBC 262325 HSFEPI HIGH SEAS FORECAST FOR METAREA XII NWS OCEAN PREDICTION CENTER WASHINGTON DC 2345 UTC THU SEP 26 2024 CCODE/2:31:12:11:00/AOW+POR+AOE/NWS/CCODE SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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). THE NATIONAL WEATHER SERVICE IS ACCEPTING PUBLIC COMMENTS UNTIL OCTOBER 16 2024 ON A PROPOSAL TO REPLACE FEET WITH METERS WHEN DESCRIBING SEAS IN A VARIETY OF NATIONAL MARINE CENTER TEXT AND GRAPHICAL PRODUCTS FOR THE HIGH SEAS AREAS ONLY. TO LEARN MORE PLEASE VISIT (WEB ADDRESS LOWERCASE) HTTPS://OCEAN.WEATHER.GOV/PROPOSED-METERS.PHP FROM OCTOBER 15 TO APRIL 1, DUE TO THE CLIMATOLOGY OF THE NORTH PACIFIC AND THE FREQUENCY AND VOLUME OF WEATHER HAZARDS, ALONG WITH CUSTOMER FEEDBACK, HIGH SEAS FORECASTS WILL BE LIMITED TO WINDS OF 25 TO 35 KNOTS AND HIGHER, AND SEAS OF 12 FEET OR GREATER, ALONG WITH FREEZING SPRAY, DENSE FOG, VOLCANIC ASH, AND ANYTHING TROPICAL (INCLUDING A DEPRESSION). LESSER CONDITIONS WILL BE INCLUDED FOR WARNING CONDITIONS AND TO PRESERVE CONTINUITY WHERE APPROPRIATE. 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 SEP 26. 24 HOUR FORECAST VALID 1800 UTC SEP 27. 48 HOUR FORECAST VALID 1800 UTC SEP 28. .WARNINGS. ...HURRICANE FORCE WIND WARNING... .LOW 50N137W 978 MB MOVING NE 30 KT. WITHIN 180 NM SW SEMICIRCLE...AND WITHIN 180 NM E OF A LINE FROM 52N136W TO 48N130W WINDS 40 TO 55 KT. SEAS 14 TO 24 FT. ELSEWHERE WITHIN AN AREA BOUNDED BY A LINE FROM 40N149W TO 50N155W TO 57N134W TO 57N128W TO 47N123W TO 40N134W WINDS 25 TO 40 KT. SEAS 9 TO 18 FT. .06 HOUR FORECAST LOW 52N134W 976 MB. FROM 50N TO 53N E OF 130W...AND WITHIN 120 NM SW SEMICIRCLE WINDS 55 TO 70 KT. SEAS 15 TO 26 FT. .18 HOUR FORECAST LOW 55N128W 1000 MB. FROM 48N TO 55N E OF 150W WINDS 25 TO 35 KT. SEAS 10 TO 23 FT...HIGHEST NEAR VANCOUVER ISLAND. .24 HOUR FORECAST LOW DISSIPATED. FROM 39N TO 52N E OF 144W WINDS LESS THAN 25 KT. SEAS 8 TO 17 FT IN MIXED SWELL. .48 HOUR FORECAST CONDITIONS DIMINISHED. ...STORM WARNING... .LOW W OF AREA NEAR 39N155E 1004 MB. WITHIN 300 NM N OF A LINE FROM 40N160E TO 34N173E WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. .24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 40N167E 1002 MB...AND NEW SECOND CENTER 40N175E 1002 MB. WITHIN 120 NM N OF A LINE FROM MAIN CENTER TO SECOND CENTER...AND WITHIN 120 NM NE QUADRANT OF SECOND CENTER WINDS 40 TO 50 KT. SEAS 12 TO 20 FT. ELSEWHERE FROM 34N TO 45N W OF 175W WINDS 25 TO 40 KT. SEAS 8 TO 16 FT. .48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 39N177W 1002 MB AND SECOND CENTER 39N168W 1002 MB. WITHIN 120 NM N OF A LINE FROM MAIN CENTER TO SECOND CENTER...AND WITHIN 120 NM NE QUADRANT OF SECOND CENTER WINDS 40 TO 50 KT. SEAS 12 TO 18 FT. ELSEWHERE FROM 34N TO 44N W OF 159W WINDS 25 TO 40 KT. SEAS 8 TO 15 FT. ...GALE WARNING... .COMPLEX LOW WITH MAIN CENTER 58N174W 999 MB MOVING NE 10 KT AND SECOND CENTER 58N179W 998 MB MOVING SE 20 KT. WITHIN 300 NM N OF MAIN CENTER...AND WITHIN 540 NM SE...AND 480 NM SW QUADRANTS OF SECOND CENTER WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. .24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 59N166W 999 MB AND SECOND CENTER 54N167W 1000 MB. WITHIN 480 NM W SEMICIRCLE OF MAIN CENTER...AND WITHIN 480 NM S SEMICIRCLE OF SECOND CENTER WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. .48 HOUR FORECAST COMBINED LOW 58N163W 998 MB. WITHIN AN AREA BOUNDED BY A LINE FROM 48N160W TO 65N175W TO 65N160W TO 48N141W TO 48N160W WINDS 20 TO 30 KT. SEAS TO 12 FT. ...GALE WARNING... .48 HOUR FORECAST NEW LOW 56N170W 1001 MB. WITHIN 360 NM SW SEMICIRCLE WINDS 25 TO 35 KT. SEAS 8 TO 12 FT. .SYNOPSIS AND FORECAST. .FROM 37N TO 41N BETWEEN 124W AND 127W WINDS 20 TO 30 KT. SEAS TO 10 FT. .24 HOUR FORECAST FROM 35N TO 42N BETWEEN 123W AND 126W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. .48 HOUR FORECAST FROM 34N TO 47N BETWEEN 124W AND 128W WINDS 20 TO 30 KT. SEAS 8 TO 14 FT. .RESUSPENDED ASH IS OCCURRING FROM SHIVELUCH VOLCANO AT POSITION 56.7N161.4E ON KAMCHATKA ISLAND. TRACE AMOUNTS OF ASHFALL MAY DRIFT E AND REACH THE SURFACE. IF MARINERS ENCOUNTER VOLCANIC ASH OF FLOATING VOLCANIC DEBRIS PLEASE REPORT THE OBSERVATION TO THE OCEAN PREDICTION CENTER BY CALLING 301-683-1520. .24 HOUR FORECAST DENSE FOG VSBY OCCASIONALLY LESS THAN 1 NM FROM 58N TO 64N BETWEEN 170W AND 163W. .48 HOUR FORECAST DENSE FOG FROM 61N TO 64N BETWEEN 162W AND 170W. .FORECASTER BYRD. OCEAN PREDICTION CENTER. NWS 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 THU SEP 26. 24 HOUR FORECAST VALID 1800 UTC FRI SEP 27. 48 HOUR FORECAST VALID 1800 UTC SAT SEP 28. .WARNINGS. ...HURRICANE WARNING... .HURRICANE JOHN NEAR 17.6N 102.8W 979 MB AT 2100 UTC SEP 26 MOVING NW OR 325 DEG AT 2 KT. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM W SEMICIRCLE...40 NM NE QUADRANT AND 130 NM SE QUADRANT. SEAS 12 FT OR GREATER WITHIN 60 NM NE QUADRANT...330 NM SE QUADRANT...270 NM SW QUADRANT...AND 90 NM NW QUADRANT WITH SEAS TO 21 FT. ELSEWHERE WITHIN 16N95W TO 21N113W TO 13N114W TO 10N112W TO 08N102W TO 12N89W TO 16N95W...INCLUDING NEAR CABO CORRIENTES AND THE GULF OF TEHUANTEPEC...WINDS 20 TO 33 KT. SEAS 11 TO 13 FT. REMAINDER OF AREA WITHIN 24N112W TO 26N114W TO 27N116W TO 23N115W TO 21N114W TO 22N112W TO 24N112W...INCLUDING WITHIN 60 NM OF SHORE...WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NW SWELL. .24 HOUR FORECAST TROPICAL STORM JOHN INLAND NEAR 18.6N 103.5W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 10 NM NE QUADRANT...70 NM SE QUADRANT...30 NM SW QUADRANT...AND 20 NM NW QUADRANT. SEAS 12 FT OR GREATER N OF 13N BETWEEN 97W AND 108W. ELSEWHERE WITHIN 15N94W TO 20N106W TO 17N114W TO 13N117W TO 08N107W TO 08N100W TO 15N94W...INCLUDING NEAR CABO CORRIENTES AND THE GULF OF TEHUANTEPEC...WINDS 20 TO 33 KT. SEAS 11 TO 13 FT. REMAINDER OF AREA WITHIN 29N114W TO 30N117W TO 24N119W TO 17N115W TO 17N110W TO 20N107W TO 29N114W...INCLUDING NEAR CABO CORRIENTES AND SEBASTIAN VIZCAINO BAY AND WITHIN 60 NM OF SHORE...WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NW SWELL. .36 HOUR FORECAST TROPICAL DEPRESSION JOHN OVER WATER NEAR 19.2N 104.7W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. .48 HOUR FORECAST POST-TROPICAL REMNANT LOW JOHN NEAR 19.8N 106.0W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. WITHIN 20N107W TO 30N116W TO 24N119W TO 10N118W TO 07N108W TO 12N92W TO 20N107W...INCLUDING NEAR CABO CORRIENTES AND SEBASTIAN VIZCAINO BAY AND WITHIN 60 NM OF SHORE AND THE GULF OF TEHUANTEPEC... WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN NW 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. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. CONVECTION VALID AT 2150 UTC THU SEP 26... .HURRICANE JOHN...NUMEROUS MODERATE TO STRONG FROM 15N TO 19N BETWEEN 98W AND 106W. SCATTERED MODERATE ELSEWHERE FROM 09N TO 21N BETWEEN 97W AND 113W. .INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... THE MONSOON TROUGH EXTENDS WEST OF HURRICANE JOHN NEAR 13N110W TO 13N126W AND BEYOND 09N140W. SCATTERED MODERATE N OF 01N E OF 85W...AND FROM 08N TO 14N BETWEEN 117W AND 134W...AND FROM 07N TO 11N W OF 134W. .FORECASTER RAMOS. NATIONAL HURRICANE CENTER. NATIONAL WEATHER SERVICE HONOLULU HI NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E SYNOPSIS VALID 1800 UTC SEP 26 2024. 24 HOUR FORECAST VALID 1800 UTC SEP 27 2024. 48 HOUR FORECAST VALID 1800 UTC SEP 28 2024. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .FIRST LOW NEAR 14N173W 1011 MB. SECOND LOW NEAR 08N169E 1010 MB. TROUGH 20N169W TO FIRST LOW TO 11N176W TO SECOND LOW TO 04N166E. LOWS AND TROUGH MOVING NW SLOWLY. ISOLATED MODERATE TSTMS WITHIN 120 NM OF LOWS AND TROUGH. .24 HOUR FORECAST FIRST LOW DISSIPATED. SECOND LOW NEAR 08N166E TROUGH 13N175W TO SECOND LOW TO 04N160E. .48 HOUR FORECAST SECOND LOW DISSIPATED. TROUGH 13N171E 04N161E. .24 HOUR FORECAST NEW TROUGH 12N160W 04N165W. .48 HOUR FORECAST TROUGH 13N167W 05N171W. .WINDS 20 KT OR LESS OVER ENTIRE FORECAST AREA. .SEAS 8 FT OR LESS OVER REMAINDER FORECAST AREA. .MONSOON TROUGH 05N163W 12N153W 10N146W 09N160W. ISOLATED MODERATE TSTMS WITHIN 90 NM OF TROUGH. .ISOLATED MODERATE TSTMS WITHIN 240 NM OF POINT 26N172W. $$ .FORECASTER PECHACEK. HONOLULU HI.