High Seas Forecast
Issued by NWS
Issued by NWS
167 FZPN01 KWBC 231610 HSFEP1 HIGH SEAS FORECAST NWS OCEAN PREDICTION CENTER WASHINGTON DC 1630 UTC MON SEP 23 2024 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 1200 UTC SEP 23. 24 HOUR FORECAST VALID 1200 UTC SEP 24. 48 HOUR FORECAST VALID 1200 UTC SEP 25. .WARNINGS. ...GALE WARNING... .LOW 58N151W 971 MB MOVING NE 10 KT. WITHIN 240 NM NE SEMICIRCLE...AND BETWEEN 180 NM AND 600 NM S SEMICIRCLE WINDS 35 TO 45 KT. SEAS 12 TO 24 FT...HIGHEST NEAR 51N151W. ELSEWHERE N OF A LINE FROM 50N128W TO 38N159W TO 42N172W WINDS 25 TO 35 KT. SEAS 8 TO 16 FT. .24 HOUR FORECAST LOW 59N146W 985 MB. WITHIN 420 NM SE...780 NM SW AND NW...AND 180 NM NE QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 19 FT...HIGHEST NEAR 56N139W. ALSO WITHIN 180 NM SE OF A FRONT FROM 52N129W TO 50N149W WINDS TO 25 KT. SEAS 8 TO 12 FT. .48 HOUR FORECAST LOW 59N149W 991 MB. WITHIN 600 NM NE OF A LINE FROM 59N168W TO 38N132W. WINDS 20 TO 30 KT. SEAS 8 TO 14 FT. ...GALE WARNING... .LOW 43N161E 1004 MB MOVING NE 30 KT. FROM 35N TO 46N W OF 176E WINDS 25 TO 35 KT. SEAS 8 TO 12 FT. .24 HOUR FORECAST LOW 46N177E 1001 MB. FROM 38N TO 49N BETWEEN 168W AND 165E WINDS 25 TO 40 KT. SEAS 8 TO 14 FT. .48 HOUR FORECAST LOW 47N163W 994 MB. WITHIN 360 NM SW QUADRANT WINDS 35 TO 45 KT. SEAS 11 TO 18 FT. ELSEWHERE FROM 38N TO 51N BETWEEN 150W AND 178W WINDS 25 TO 35 KT. SEAS 8 TO 15 FT. .SYNOPSIS AND FORECAST. .FROM 30N TO 44N BETWEEN 124W AND 131W AREA OF N WINDS 20 TO 30 KT. SEAS TO 10 FT. .24 HOUR FORECAST WITHIN 300 NM S OF A LINE FROM 46N124W TO 39N132W AREA OF N WINDS TO 25 KT. SEAS TO 9 FT. .48 HOUR FORECAST FROM 30N TO 37N E OF 133W WINDS LESS THAN 25 KT. SEAS TO 8 FT. .48 HOUR FORECAST FROM 35N TO 40N W OF 173E WINDS 20 TO 30 KT. SEAS TO 10 FT. .48 HOUR FORECAST LOW NW OF AREA 60N169E 1003 MB. W AND N OF A LINE FROM 48N170E TO 55N180W WINDS TO 25 KT. SEAS TO 8 FT. .DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 42N TO 45N W OF 173E...AND N OF 45N E OF 128W. .24 HOUR FORECAST DENSE FOG FROM 41N TO 47N BETWEEN 171W AND 173E...AND N OF 38N E OF 126W. .48 HOUR FORECAST DENSE FOG FROM 42N TO 47N BETWEEN 153W AND 163W. .FORECASTER KELLS. 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 MON SEP 23. 24 HOUR FORECAST VALID 1200 UTC TUE SEP 24. 48 HOUR FORECAST VALID 1200 UTC WED SEP 25. .WARNINGS. ...HURRICANE WARNING... .TROPICAL STORM JOHN NEAR 14.8N 98.5W 992 MB AT 1500 UTC SEP 23 MOVING N OR 00 DEG AT 3 KT. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM OF CENTER EXCEPT 40 NM NE QUADRANT. SEAS 12 FT OR GREATER WITHIN 45 NM N SEMICIRCLE AND 75 NM S SEMICIRCLE WITH SEAS TO 15 FT. ELSEWHERE WITHIN 15N97W TO 30N128W TO 30N131W TO 11N102W TO 10N98W TO 12N97W TO 15N97W WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF AREA WITHIN 13N96W TO 16N98W TO 13N103W TO 14N105W TO 12N111W TO 08N97W TO 13N96W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL. .12 HOUR FORECAST HURRICANE JOHN NEAR 15.2N 98.3W. MAXIMUM SUSTAINED WINDS 75 KT GUSTS 90 KT. .24 HOUR FORECAST HURRICANE JOHN NEAR 15.7N 97.9W. MAXIMUM SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM S SEMICIRCLE...50 NM NE QUADRANT AND 40 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 60 NM OF CENTER WITH SEAS TO 18 FT. ELSEWHERE WITHIN 16N97W TO 14N100W TO 12N108W TO 11N109W TO 10N99W TO 11N96W TO 16N97W WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF AREA WITHIN 12N94W TO 16N97W TO 15N101W TO 12N111W TO 09N103W TO 08N94W TO 12N94W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. .48 HOUR FORECAST TROPICAL STORM JOHN INLAND NEAR 16.2N 97.4W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM N SEMICIRCLE...40 NM SE QUADRANT AND 30 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM S OF CENTER WITH PEAK SEAS TO 14 FT. ELSEWHERE WITHIN 15N95W TO 16N99W TO 13N100W TO 12N110W TO 09N100W TO 11N95W TO 15N95W WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF AREA WITHIN 13N89W TO 16N94W TO 17N106W TO 11N112W TO 08N103W TO 08N92W TO 13N89W...INCLUDING THE GULF OF TEHUANTEPEC...WINDS 20 KT OR LESS. SEAS 8 TO 10 FT 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 30N127W TO 30N131W TO 29N131W TO 29N129W TO 30N127W WINDS 20 KT OR LESS. SEAS 8 FT IN N TO NW SWELL. .18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .WITHIN 12N121W TO 12N124W TO 11N125W TO 10N125W TO 10N121W TO 12N121W WINDS 20 KT OR LESS. SEAS 8 FT IN S TO SW SWELL. .24 HOUR FORECAST WITHIN 13N116W TO 13N119W TO 12N122W TO 11N120W TO 11N117W TO 12N115W TO 13N116W WINDS 20 KT OR LESS. SEAS 8 FT IN S TO SW SWELL. .30 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. CONVECTION VALID AT 1200 UTC MON SEP 23... .INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... MONSOON TROUGH AXIS EXTENDS FROM 15N111W TO 12N140W. SCATTERED MODERATE FROM 08N TO 11N BETWEEN 127W AND 136W. $$ .FORECASTER ADAMS. NATIONAL HURRICANE CENTER.