High Seas Forecast
Issued by NWS
Issued by NWS
300 FZPN40 PHFO 180335 HSFNP HIGH SEAS FORECAST NATIONAL WEATHER SERVICE HONOLULU HI 0500 UTC WED SEP 18 2024 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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. THIS HIGH SEAS FORECAST USES 1-MINUTE AVERAGE WINDS WHICH MAY BE HIGHER THAN 10-MINUTE AVERAGE WINDS. 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 OFFSHORE AND HIGH SEAS AREAS ONLY. TO LEARN MORE PLEASE VISIT HTTPS://OCEAN.WEATHER.GOV/PROPOSED-METERS.PHP SECURITE NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E SYNOPSIS VALID 0000 UTC SEP 18 2024. 24 HOUR FORECAST VALID 0000 UTC SEP 19 2024. 48 HOUR FORECAST VALID 0000 UTC SEP 20 2024. .WARNINGS. .NONE. .SYNOPSIS AND FORECAST. .TROUGH FROM 21N160E TO 27N163E MOVING NW 10 KT. SCATTERED MODERATE TSTMS OVER FORECAST FROM 27N TO 17N W OF 165E. .12 HOUR FORECAST TROUGH DISSIPATED W OF FORECAST AREA. .48 HOUR FORECAST NEW TROUGH FROM 07N170E TO 10N179W TO 14N170W. ASSOCIATED WINDS INCLUDED BELOW. .WINDS E TO NE 20 TO 25 KT FROM 18N TO 10N BETWEEN 179E AND 140W. .24 HOUR FORECAST WINDS E TO NE 20 TO 25 KT FROM 18N TO 10N BETWEEN 170E AND 160W. .48 HOUR FORECAST WINDS E TO NE 20 TO 25 KT FROM 16N TO 10N BETWEEN 163E AND 170W. ALSO WINDS E TO SE 20 TO 25 KT FROM 08N TO 00N BETWEEN 175W AND 165W. .WINDS 20 KT OR LESS REMAINDER FORECAST AREA. .SEAS 8 TO 10 FT FROM 18N TO 00N BETWEEN 165W AND 150W. .24 HOUR FORECAST SEAS 8 TO 9 FT FROM 16N TO 00N BETWEEN 173W AND 163W. .48 HOUR FORECAST SEAS SUBSIDED TO 8 FT OR LOWER. .SEAS 8 FT OR LOWER REMAINDER FORECAST AREA. .ITCZ FROM 08N140W TO 08N147W TO 10N156W TO 07N167W TO 08N175W TO 06N175E TO 09N166E. SCATTERED MODERATE TO STRONG TSTMS WITHIN 240 NM N OF ITCZ. ISOLATED MODERATE TO STRONG TSTMS WITHIN 120 NM S OF ITCZ. .OTHERWISE AND ELSEWHERE ISOLATED MODERATE TSTMS FROM 30N TO 25N BETWEEN 175W AND 165W. $$ .FORECASTER BEDAL HONOLULU HI.