Marine Weather for HS 001

Forecast
High Seas Forecast NWS ocean prediction center Washington DC 2230 UTC Sat Sep 23 2017

Superseded by next issuance in 6 hours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 1800 UTC Sep 23. 24 hour forecast valid 1800 UTC Sep 24. 48 hour forecast valid 1800 UTC Sep 25.

.Warnings.

...Gale Warning... .Low 57n155w 990 mb moving NE 10 kt. Within 240 nm SW quadrant winds 25 to 35 kt. Seas to 11 ft. Elsewhere within 660 nm NW...420 nm NE...900 nm se and 480 nm SW quadrants winds to 25 kt. Seas to 9 ft. .24 hour forecast low 59n149w 996 mb. Within 60 nm NW...120 nm NE...300 nm se and 420 nm SW quadrants winds to 25 kt. Seas to 10 ft. .48 hour forecast low dissipated and conditions diminished.

...Gale Warning... .Low 42n174w 999 mb moving E 15 kt. Within 360 nm SW quadrant winds 25 to 35 kt. Seas 8 to 13 ft. Elsewhere within 600 nm N and 720 nm S semicircles winds to 25 kt. Seas to 8 ft. .24 hour forecast low 42n166w 996 mb. Within 360 nm W semicircle winds 25 to 40 kt. Seas 8 to 15 ft. Elsewhere within 480 nm N and 780 nm S semicircles winds to 25 kt. Seas to 10 ft. .48 hour forecast low 48n156w 996 mb. Within 240 nm W semicircle winds 25 to 40 kt. Seas 8 to 14 ft. Elsewhere within 480 nm N semicircle...and 840 nm se and 720 nm SW quadrants winds to 25 kt. Seas to 10 ft.

...Gale Warning... .Low 43n160w 1004 mb moving NE 30 kt. Within 540 nm S semicircle winds 20 to 30 kt. Seas to 11 ft. .24 hour forecast low 49n143w 1005 mb. Within 360 nm se and 480 nm SW quadrants winds 25 to 35 kt. Seas 8 to 14 ft. Elsewhere within 240 nm N semicircle...and 540 nm se and 660 nm SW quadrants winds to 25 kt. Seas to 10 ft. .48 hour forecast low 53n131w 1006 mb. Within 240 nm S semicircle winds to 25 kt. Seas to 10 ft.

...Gale Warning... .24 hour forecast new low 59n163w 994 mb. Within 300 nm W semicircle winds 25 to 40 kt. Seas 8 to 14 ft. Elsewhere within 480 nm W semicircle and 300 nm SW quadrant winds to 25 kt. Seas to 8 ft. .48 hour forecast low 57n161w 1002 mb. Within 540 nm W and 180 nm E semicircles winds 20 to 30 kt. Seas to 9 ft.

...Gale Warning... .24 hour forecast low W of area near 37n157e 1002 mb. Within 360 nm NE quadrant winds 25 to 35 kt. Seas to 12 ft. Elsewhere from 30n to 43n W of 170e winds to 25 kt. Seas to 8 ft. .48 hour forecast low 37n163e 1004 mb. Within 420 nm NE quadrant winds 25 to 35 kt. Seas 10 to 15 ft. Elsewhere from 30n to 46n W of 179w winds to 25 kt. Seas to 10 ft.

.Synopsis and forecast.

.bogoslof Volcano at 53.92n 168.03w is currently in a heightened state of unrest. Mariners traveling in the vicinity of bogoslof Volcano are urged to exercise caution. If mariners encounter any volcanic ash...report the observation to the ocean prediction center by calling 301-683-1520.

.From 33n to 43n between 122w and 130w winds to 25 kt. Seas to 10 ft. .24 hour forecast from 31n to 45n between 122w and 130w winds to 25 kt. Seas to 10 ft. .48 hour forecast from 30n to 44n between 122w and 131w winds 20 to 30 kt. Seas to 11 ft.

.Dense fog. Vsby occasionally less than 1 nm from 47n to 52n between 141w and 146w and from 39n to 45n between 147w and 163w. .24 hour forecast dense fog within 360 nm se of a line from 43n161w to 51n142w. .48 hour forecast dense fog from 40n to 51n between 136w and 157w.

.High 41n138w 1028 mb moving S 10 kt. .24 hour forecast high 37n136w 1026 mb. .48 hour forecast little change.

.high 53n172e 1022 mb moving S 10 kt. .24 hour forecast high dissipated.

.24 hour forecast high 48n169e 1025 mb. .48 hour forecast high 48n172e 1028 mb.

.high 34n160e 1018 mb moving se 20 kt. .24 hour forecast high 31n170e 1020 mb. .48 hour forecast high moved S of area.

.Forecaster Holley. Ocean prediction center.

National Hurricane Center Miami FL

E Pacific from the Equator to 30n E of 140w and 03.4s to the Equator E of 120w

Synopsis valid 1800 UTC Sat Sep 23. 24 hour forecast valid 1800 UTC sun Sep 24. 48 hour forecast valid 1800 UTC Mon Sep 25.

.Warnings.

...Tropical Storm Warning... .Tropical Depression Eighteen-E near 18.4n 105.3w 1005 mb at 2100 UTC Sep 23 moving NNW or 335 deg at 4 kt. Maximum sustained winds 30 kt gusts 40 kt. Within 60 nm NE semicircle winds 20 to 30 kt. Seas to 9 ft. Elsewhere within 90 nm NE and 150 nm SW semicircles winds 20 to 25 kt. Seas to 10 ft. Scattered moderate isolated strong convection within 120 nm E semicircle. Scattered strong convection within 150 nm W semicircle. .12 hour forecast tropical storm eighteen-E near 18.8n 105.5w. Maximum sustained winds 40 kt gusts 50 kt. Within 50 nm NE semicircle winds 30 to 40 kt. Seas to 11 ft. Elsewhere within 90 nm NE and 150 nm SW semicircles winds 20 to 30 kt. Seas to 11 ft. Scattered moderate to strong convection within 120 nm E and 150 nm W semicircles. .24 hour forecast tropical storm eighteen-E near 19.4n 105.7w. Maximum sustained winds 50 kt gusts 60 kt. Tropical storm force winds within 50 nm of center except 0 nm SW quadrant. Seas 12 ft or greater within 90 nm SW quadrant with seas to 13 ft. Elsewhere within 90 nm NE and 150 nm SW semicircles winds 20 to 33 kt. Seas to 11 ft. .48 hour forecast tropical storm eighteen-E near 21.2n 106.2w. Maximum sustained winds 45 kt gusts 55 kt. Little change in radius of tropical storm force winds and seas 12 ft or greater. Elsewhere within 90 nm N and 150 nm S semicircles winds 20 to 33 kt. Seas to 11 ft. .72 hour forecast tropical storm eighteen-E near 22.7n 107.0w. Maximum sustained winds 40 kt gusts 50 kt. Extended outlook...use for guidance only...errors may be large. .96 hour forecast Post-tropical eighteen-E near 24.0n 108.4w. Maximum sustained winds 35 kt gusts 45 kt. .120 hour forecast Post-tropical remnant low eighteen-E near 26.0n 110.0w. Maximum sustained winds 30 kt gusts 40 kt.

Forecast winds in and near active tropical cyclones should be used with caution due to uncertainty in forecast track...size and intensity.

.Synopsis and forecast.

.from 10n to 13.5n between 103w and 111w...and from 10n to 11.5n between 111w and 118w...SW to W winds 20 to 25 kt. Seas 8 to 11 ft. Elsewhere from 08.5n to 15.5n between 98w and 136w winds 20 kt or less. Seas 8 to 10 ft in mixed swell. .24 hour forecast from 10n to 13n between 103w and 113w SW to W winds 20 to 25 kt. Seas 8 to 10 ft. Elsewhere from 08.5n to 14n between 96w and 115w winds 20 kt or less. Seas to 9 ft in mixed swell. .48 hour forecast from 08.5n to 12n between 98w and 108w SW to W winds 20 to 25 kt. Seas 8 to 9 ft. Elsewhere from 08n to 12.5n between 95w and 112w winds 20 kt or less. Seas to 8 ft in mixed swell.

.48 hour forecast low pres near 13.5n125w 1010 mb. Within 150 nm NW and 210 nm se semicircles winds 20 to 25 kt. Seas to 8 ft.

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

Convection valid at 2100 UTC Sat Sep 23...

Intertropical convergence zone/monsoon trough...

Monsoon trough from 09n73w to 11.5n85w to 15.5n102w...then resumes from near 15n110w to low pres near 12.5n127w 1010 mb to low pres near 13n138w 1010 mb to beyond 11n140w. Scattered moderate to strong convection from 03.5n to 15.5n between 78w and 90w...from 10n to 15n between 92w and 115w...and 08.5n to 12.5n between 125w and 138w.

$$ .Forecaster stripling. National Hurricane Center.

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Place ID Sea Temp Wave Height
SOUTHWEST BERING SEA 142NM NNE OF ATTU IS, AK 46070 38 °F 11.15 ft
WESTERN ALEUTIANS 14NM SOUTH OF AMCHITKA IS, AK 46071 45 °F
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