Marine Weather for HS 005

High Seas Forecast National Weather Service Honolulu HI 2300 UTC Mon Aug 19 2019

Superseded by next issuance in 6 hours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.


North Pacific Equator to 30n between 140w and 160e

Synopsis valid 1800 UTC Aug 19 2019. 24 hour forecast valid 1800 UTC Aug 20 2019. 48 hour forecast valid 1800 UTC Aug 21 2019.



.Synopsis and forecast.

.low 08n166e 1007 mb moving W slowly. Trough from 09n160e to low to 11n175e moving NW slowly. Isolated moderate tstms S of 11n between 169e and 180e and from 08n to 11n W of 167e. .24 hour forecast low 09n160e 1007 mb. Trough from low to 13n172e. .48 hour forecast low moved W of area. Trough from 09n160e to 13n167e.

.Front from 30n173e to 28n160e nearly stationary. Second front just N of area moving se 10 kt. Winds 20 to 25 kt and seas 8 to 9 ft N of line from 30n180e to 17n170e to 26n160e. .24 hour forecast fronts merged from 30n175e to 27n160e. Winds 20 to 25 kt and seas 8 to 9 ft within 120 nm se of front. .48 hour forecast front from 30n174e to 25n160e. Winds 20 to 25 kt and seas 8 to 9 ft within 120 nm se of front.

.Trough from 20n152w to 13n147w moving SW 10 kt. .24 hour forecast trough from 16n153w to 10n153w dissipating. .48 hour forecast trough dissipated.

.trough from 17n161w to 12n168w moving W slowly and dissipating. Isolated moderate tstms from 10n to 16n between 160w and 171w. .24 hour forecast trough dissipated.

.high 27n164w 1017 mb moving N slowly. Ridge from 30n143w to high to 25n175e to 24n160e nearly stationary. .24 hour forecast high 30n165e 1019 mb. .48 hour forecast high moved N of area.

.Winds 20 kt or less remainder forecast area.

.seas 8 ft or lower remainder forecast area.

.ITCZ from 09n140w to 09n150w to 08n160w. Isolated moderate tstms within 120 nm of ITCZ.

.Numerous moderate to strong tstms from 13n to 18n W of 166e. Isolated moderate tstms from 12n to 18n between 177w and 167e and from 04n to 10n between 163w and 180w.


.Forecaster Burke. Honolulu HI.

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