Superseded by next issuance in 6 hours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.

Securite

Pacific N of 30n and S of 67n E of a line from Bering Strait to 50n 160e

Synopsis valid 0600 UTC Aug 20. 24 hour forecast valid 0600 UTC Aug 21. 48 hour forecast valid 0600 UTC Aug 22.

.Warnings.

...Gale Warning... .Low 51n137w 981 mb moving E 10 kt. Within 600 nm S and SW quadrants winds 25 to 40 kt. Seas 12 to 25 ft. .24 hour forecast low 50n130w 998 mb. Within 420 nm SW quadrant winds 20 to 30 kt. Seas 10 to 16 ft. .48 hour forecast low dissipated with conditions diminished.

...Gale Warning... .Low 44n179w 1005 mb moving NE 25 kt. Within 360 nm S and se quadrants winds 20 to 30 kt. Seas 8 to 13 ft. .24 hour forecast new low 48n155w 1001 mb. Front to extend from low center to 46n160w to 44n169w. Within 300 nm S quadrant winds 25 to 35 kt. Seas 9 to 15 ft. Also within 360 nm S quadrant and 360 nm se of front winds 20 to 30 kt. Seas 8 to 14 ft. .48 hour forecast complex low with first low 51n145w 998 mb and second low 50n153w 999 mb. Front to extend from first low center to 45n150w to 40n157w. Within 360 nm S quadrant of first low and 360 nm SW quadrant of second low and 300 nm se of front winds 20 to 30 kt. Seas 8 to 14 ft.

...Gale Warning... .Low 40n172e 1004 mb moving NE 25 kt. Within 300 nm se quadrant winds 25 to 35 kt. Seas 8 to 16 ft. .24 hour forecast low 43n171w 1009 mb. Within 360 nm S and SW quadrants winds 25 to 35 kt. Seas 8 to 15 ft. .48 hour forecast low and conditions absorbed into complex low 51n145w.

.Synopsis and forecast.

.low 54n172e 1000 mb moving E 10 kt. Within 240 nm N quadrant winds less than 25 kt. Seas to 8 ft. .24 hour forecast low 55n179w 1001 mb. Within 300 nm SW quadrant winds to 25 kt. Seas to 8 ft. .48 hour forecast low 54n172w 1005 mb. Within 360 nm SW quadrant winds to 25 kt. Seas to 8 ft.

.From 30n to 35n between 118w and 124w winds to 25 kt. Seas to 8 ft. .24 hour forecast from 31n to 36n between 120w and 123w area of NW winds to 25 kt. Seas to 8 ft. .48 hour forecast from 32n to 41n between 120w and 127w NW winds to 25 kt. Seas to 11 ft.

.Low 35n159e 1005 mb W of area moving NE 20 kt. Within 300 nm se quadrant winds to 25 kt. Seas 8 to 10 ft. .24 hour forecast low 40n171e 1007 mb. Within 300 nm S and SW quadrants winds 20 to 30 kt. Seas 8 to 14 ft. .48 hour forecast low 43n177w 1012 mb. Within 360 nm S and SW quadrants winds 20 to 30 kt. Seas 8 to 13 ft.

.48 hour forecast W of a line from 48n170e to 39n171e to 35n165e to 30n162e winds to 25 kt. Seas to 8 ft.

.From 38n to 43n between 125w and 129w and from 42n to 48n between 148w and 175w and also from 51n to 55n between 175w and 170e areas of dense fog occasionally reducing visibility below 1 nm. .24 hour forecast from 40n to 48n between 146w and 167w and from 51n to 55n between 174w and 170e areas of dense fog occasionally reducing visibility below 1 nm. .48 hour forecast from 42n to 50n between 136w and 153w and from 40n to 46n W of 170e and from 51n to 54n between 176w and 178e areas of dense fog occasionally reducing visibility below 1 nm.

.High 34n159w 1027 mb drifting W. .24 hour forecast high 34n163w 1027 mb. .48 hour forecast high 33n164w 1027 mb.

.24 hour forecast high 43n179e 1017 mb. .48 hour forecast high 41n166w 1021 mb.

.forecaster Rowland. Ocean prediction center.

Tropical Prediction Center Miami FL E Pacific from the Equator to 30n E of 140w

Synopsis valid 0600 UTC Wed Aug 20. 24 hour forecast valid 0600 UTC Thu Aug 21. 48 hour forecast valid 0600 UTC Fri Aug 22.

.Warnings.

.none.

.Synopsis and forecast.

.low...remnants of Iselle...16n120w 1007 mb move SW 5 kt. Within 180 nm NW semicircle winds to 20 kt. Seas to 8 ft. .24 hour forecast low 15n121w 1009 mb. Within 240 nm NW quadrant winds 20 kt. Seas to 8 ft. .48 hour forecast low 13n124w 1010 mb. Within 240 nm NW quadrant winds 20 kt. Seas to 8 ft.

.S of 05n between 95w and 125w S winds to 20 kt. Seas 8 ft in mixed S and SW swell. .24 hour forecast S of line from 00n80w to 05n83w to 10n105w 10n115w to 00n125w S winds to 20 kt. Seas to 9 ft in mixed se and SW swell. .48 hour forecast S of 10n from 02w to 123w S winds to 20 kt. Seas to 9 ft in mixed se and SW swell.

.Remainder of area winds less than 20 kt. Seas less than 8 ft.

.Convection valid 0845 UTC Wed Aug 20. Remnant of Iselle...scattered moderate to strong within 75 nm of 16.5n123w.

.Intertropical convergence zone...06n77w to 08n100w to 11n120w to 11n140w. Scattered moderate to strong within 60 nm of 13n90w. Scattered moderate isolated strong within 120 nm either side of axis from 89w to 108w.

$$ .Forecaster ll. Tropical Prediction Center.