Marine Weather for HS 005

High Seas Forecast National Weather Service Honolulu HI 1700 UTC Fri Aug 23 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Superseded by next issuance in 6 hours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 1200 UTC Aug 23 2019. 24 hour forecast valid 1200 UTC Aug 24 2019. 48 hour forecast valid 1200 UTC Aug 25 2019.



.Synopsis and forecast.

.weak front from 30n172e to 27n165e to 29n160e nearly stationary except moving E slowly E of 170e. .24 hour forecast front from 30n173e to 27n166e to 29n160e. .48 hour forecast front from 30n177e to 28n167e to 30n160e.

.Cor trough from 30n148w to 26n155w to 23n162w moving W 10 kt. Scattered moderate tstms within 100 nm of trough. NE winds 20 to 25 kt between trough and 168w from 28n to 23n. .24 hour forecast trough from 30n156w to 25n164w to 20n168w. NE winds diminished to 20 kt or less. .48 hour forecast trough from 29n167w to 20n173w.

.ridge from 30n178e to 22n161e moving NE 15 kt and eroding from W.

.Ridge from 30n143w to 29n147w moving N slowly.

.24 hour forecast E winds 20 to 25 kt between 24n and 16n E of 148w. .48 hour forecast E winds 20 to 25 kt between 24n and 14n E of 158w.

.Remainder forecast area...Winds 20 kt or less...seas 8 ft or lower.

.Monsoon trough from 13n140w to 11n150w thence ITCZ to 08n165w to 06n175e. Scattered moderate tstms between 14n and 05n W of 170w. Isolated moderate tstms within 120 nm of monsoon trough.

.Scattered moderate tstms from 20n to 22n from 175w to 180e.


.forecaster lau. Honolulu HI.

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