Superseded by next issuance in 6 hours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 0600 UTC Aug 03 2015. 24 hour forecast valid 0600 UTC Aug 04 2015. 48 hour forecast valid 0600 UTC Aug 05 2015.
...Hurricane Warning... .Hurricane Guillermo near 16.2n 145.4w moving WNW 09 kt at 03/0900 UTC. Maximum sustained winds 65 kt gusts 80 kt. Tropical storm force winds within 115 nm NE...100 nm se...50 nm SW...70 nm NW quadrants. Seas 12 ft or greater within 300 nm NE...200 nm se...270 nm SW...310 nm NW quadrants. Winds 20 to 33 kt elsewhere within 300 nm N semicircle...and within 120 nm S semicircle. Seas 8 to 12 ft elsewhere from 10n to 25n E of 151w. Scattered moderate tstms within 200 nm NE quadrant of center. .24 hour forecast Tropical Storm Guillermo near 17.5n 148.1w. Maximum sustained winds 55 kt gusts 65 kt. Tropical storm force winds within 90 nm NE...80 nm se...40 nm SW...60 nm NW quadrants. Seas 12 ft or greater within 220 nm of center. Winds 20 to 33 kt elsewhere within 260 nm N semicircle...and within 100 nm elsewhere. Seas 8 to 12 ft elsewhere from 12n to 27n between 153w and 145w. .48 hour forecast Tropical Storm Guillermo near 18.9n 151.5w. Maximum sustained winds 45 kt gusts 55 kt. Tropical storm force winds within 80 nm NE...60 nm se...30 nm SW...55 nm NW quadrants. Seas 12 ft or greater within 200 nm of center. Winds 20 to 33 kt elsewhere within 240 nm N semicircle...and within 80 nm S elsewhere. Seas 8 to 12 ft elsewhere from 15n to 28n between 147w and 155w. .72 hour forecast Tropical Storm Guillermo near 20.5n 155.0w. Maximum sustained winds 40 kt gusts 50 kt. .Extended outlook...Use for guidance only...errors may be large. .96 hour forecast Tropical Storm Guillermo near 22.6n 158.9w. Maximum sustained winds 35 kt gusts 45 kt. .120 hour forecast Tropical Depression Guillermo near 24.5n 163.1w. Maximum sustained winds 30 kt gusts 40 kt.
.Forecast winds near tropical cyclones should be used with caution due to uncertainty in forecast track...size and intensity.
.Synopsis and forecast.
.low 13n174w 1006 mb moving SW near 10 kt. Trough from low to 07n175w. Isolated tstms within 150 nm N semicircle. .24 hour forecast low dissipated.
.low 02n177e 1006 mb nearly stationary. Troughs from low to 04n177e and from low to 05n166e. Scattered moderate tstms S of trough W of low between 175e and 168e. .24 hour forecast low 04n177e 1006 mb. .48 hour forecast low dissipated.
.Low near 14n161w 1007 mb with trough to 09n159w moving W 15 kt. Winds 20 to 25 kt within 150 nm N semicircle of low. Isolated moderate tstms within 150 nm W of trough N of 12n. .24 hour forecast low dissipated. Trough 15n166w to 09n166w. Winds diminished to 20 kt or less. .48 hour forecast trough 14n171w to 08n171w.
.trough from 25n178e to 12n173e moving SW 10 kt. Isolated moderate tstms from 15n to 19n W of 172e...and from 24n to 27n between 176w and 179w. Isolated tstms within 90 nm of trough N of 17n. .24 hour forecast trough from 24n176e to 19n171e to 11n170e. .48 hour forecast trough dissipated.
.Trough from 24n150w to 22n152w moving W 10 kt. .24 hour forecast trough 26n153w to 22n156w. .48 hour forecast trough 27n159w to 20n161w.
.front just N of forecast area along 31n from 175e to 170e moving S slowly. Scattered tstms within 120 nm of front. .24 hour forecast front along 30n from 175e to 168e. .48 hour forecast front moved N of forecast area.
.Ridge from 30n161w to 26n177w to 25n170e to 28n160e nearly stationary.
.Otherwise winds 20 kt or less and seas 8 ft or less over remainder of area.
.Seas elsewhere...8 ft or less.
.Widely scattered tstms within 120 nm either side of a line... 30n175w 23n177e 17n168e.
.ITCZ...From hurcn Guillermo to 10n150w to 08n153w to 03n160w to 02n167w. Scattered tstms within 150 nm of ITCZ W of 150w.
$$ .Forecaster lau. Honolulu HI