Superseded by next issuance in 6 hours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 50n160e

Synopsis valid 1800 UTC Nov 20. 24 hour forecast valid 1800 UTC Nov 21. 48 hour forecast valid 1800 UTC Nov 22.

.Warnings.

...Storm Warning... .Low 56n146w 982 mb moving NE 10 kt. Within 180 nm W semicircle winds 35 to 50 kt. Seas 11 to 19 ft. Elsewhere within 240 nm of low center...except 540 nm W quadrant winds 25 to 35 kt. Seas 8 to 15 ft. .24 hour forecast low 58n141w 984 mb. Within 180 nm E and also within 600 nm SW quadrant winds 25 to 35 kt. Seas 9 to 16 ft. .48 hour forecast low moved inland over Alaska with conditions described with low 60n149w below.

...Storm Warning... .Low W of area 54n158e 977 mb moving NE 10 kt. Within 600 nm S and se quadrants winds 40 to 50 kt. Seas 14 to 22 ft. Elsewhere W of a front extending from 39n166e to 48n171e to 53n167e winds 25 to 40 kt. Seas 12 to 20 ft. .24 hour forecast low NW of area 56n167e 982 mb. Conditions described with low 58n179e below. .48 hour forecast low NW of area 55n168e 983 mb. Conditions described with lows 57n178w and 49n174e below.

...Storm Warning... .Low 42n153w 1005 mb moving NE 35 kt and intensifying rapidly. Within 420 nm E and se and within 780 nm S quadrants N of 30n... winds 25 to 40 kt. Seas 8 to 15 ft. .12 hour forecast low 47n138w 1000 mb. Within 420 nm S and SW quadrants winds 35 to 50 kt. Seas 12 to 22 ft. .24 hour forecast low 51n132w 982 mb. Front to extend from low to 45n132w to 38n142w. Within 420 nm S quadrant winds 40 to 55 kt. Seas 14 to 24 ft. Elsewhere within 120 nm N semicircle...also within 540 nm SW quadrant...and within 300 nm E and NE of front winds 25 to 40 kt. Seas 12 to 20 ft. .48 hour forecast low moved well inland.

...Storm Warning... .Low 53n178e 989 mb moving NE 20 kt and intensifying. Within 360 nm E semicircle winds 35 to 45 kt. Seas 14 to 22 ft. Elsewhere within 660 nm N and NE...and 600 nm S and se quadrants winds 25 to 35 kt. Seas 10 to 18 ft. .12 hour forecast low 55n179w 976 mb. Within 300 nm NE quadrant winds 35 to 50 kt. Seas 14 to 24 ft. .24 hour forecast low 58n179e 970 mb. Within 360 nm NE and 240 nm S quadrants winds 45 to 55 kt. Seas 20 to 28 ft. Elsewhere within 540 nm NE...960 nm se and 720 nm SW quadrants winds 30 to 45 kt. Seas 16 to 32 ft with highest conditions near 50n168e. .48 hour forecast low 57n178w 988 mb. Within 300 nm NW quadrant winds 25 to 40 kt. Seas 14 to 24 ft.

...Storm Warning... .24 hour forecast from 39n to 47n W of 166e area of S winds 25 to 40 kt. Seas 12 to 22 ft. .48 hour forecast low 49n174e 982 mb. Between 240 nm and 540 nm se quadrant winds 40 to 50 kt. Seas 15 to 25 ft. Elsewhere within 720 nm E and NE...within 900 nm S and se...and within 960 nm S and SW quadrants winds 25 to 40 kt. Seas 12 to 22 ft.

...Gale Warning... .Low 37n163w 1001 mb moving S 10 kt and weakening. Within 300 nm N and NW quadrants winds 35 to 45 kt. Seas 12 to 22 ft. Elsewhere within 420 nm NW semicircle winds 25 to 35 kt. Seas 10 to 18 ft. .24 hour forecast low 34n163w 1014 mb. Within 720 nm E and NE and 420 nm W quadrants winds less than 25 kt. Seas 8 to 14 ft. .48 hour forecast low dissipated.

...Gale Warning... .Low 51n129w 998 mb moving E 15 kt. Within 540 nm SW quadrant winds 25 to 40 kt. Seas 10 to 18 ft. .24 hour forecast low moved well inland with conditions described by low 51n132w above.

...Gale Warning... .48 hour forecast new complex low with mean center 58n152w 984 mb. Within 360 nm NE...420 nm se...and 780 nm SW quadrants winds 25 to 40 kt. Seas 11 to 21 ft.

...Gale Warning... .48 hour forecast new low 45n146w 1000 mb. Within 300 nm NE and 540 nm S and se...and 840 nm W and SW quadrants winds 25 to 40 kt. Seas 8 to 15 ft.

...Heavy freezing spray warning... .N of a line from 56n154w to 58n166w areas of moderate to heavy freezing spray. .24 hour forecast N and NE of a line from 57n153w to 61n177w areas of moderate to heavy freezing spray. .48 hour forecast N and NE of a line from 58n162w to 61n178w areas of moderate to heavy freezing spray.

.Synopsis and forecast.

.from 30n to 34n between 119w and 122w area of N winds to 25 kt. Seas less than 8 ft. .24 hour forecast from 30n to 39n between 121w and 128w area of N winds to 25 kt. Seas 8 to 14 ft in NW swell. .48 hour forecast from 30n to 38n between 122w and 128w area of N winds to 25 kt. Seas 8 to 12 ft in NW swell.

.Within 300 nm se of a line from 41n170e to 54n175e areas of dense fog occasionally reducing vsby to less than 1 nm. .24 hour forecast conditions improved. .48 hour forecast from 39n to 48n between 176e and 167e area of dense fog occasionally reducing vsby to less than 1 nm.

.High 35n139w 1030 mb nearly stationary. .24 hour forecast high 33n137w 1030 mb. .48 hour forecast high 33n137w 1028 mb.

.high 47n168w 1022 mb moving se 25 kt. .24 hour forecast high 42n147w 1023 mb. .48 hour forecast high 40n130w 1027 mb.

.High 31n174e 1022 mb nearly stationary and weakening. .24 hour forecast high little change. .48 hour forecast high dissipated.

.24 hour forecast high 40n174e 1025 mb. .48 hour forecast high 38n167w 1029 mb.

.forecaster Mills. Ocean prediction center.

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

Synopsis valid 1800 UTC Thu Nov 20. 24 hour forecast valid 1800 UTC Fri Nov 21. 48 hour forecast valid 1800 UTC Sat Nov 22.

.Warnings.

...Gale Warning... .24 hour forecast within 60 nm of line 16n95w to 14n95w to 13n97w N to NE winds 25 to 35 kt. Seas 10 to 13 ft. .48 hour forecast within 60 nm of line 16n95w to 14n95w to 12n98.5w N to NE winds 30 to 40 kt. Seas 12 to 16 ft.

.Synopsis and forecast.

.within 60 nm of line 16n95w to 14n95w to 13n98w N to NE winds 20 to 25 kt. Seas 9 to 11 ft. Elsewhere within 90 nm of line 16n95w to 14n95w to 09n108w NE winds to 20 kt. Seas 8 to 11 ft. .24 hour forecast...Except as noted in warning. Within 90 nm of line 16n95w to 14n95w to 11n102w NE winds 20 to 25 kt. Seas to 9 ft. .48 hour forecast...Except as noted in warning. Within 90-120 nm of line 16n95w to 14n95w to 10n107w NE winds 20 to 30 kt. Seas 9 to 13 ft.

.From 07n to 12n between 85.5w and 92w...including Gulf of papagayo...NE winds 20 to 30 kt. Seas 8 to 12 ft. .24 hour forecast within 75 nm of line from 11n86w to 08n92w... Including Gulf of papagayo...NE winds 20 to 25 kt. Seas to 9 ft. .48 hour forecast within 120 nm of line from 11n86w to 08n93w... Including Gulf of papagayo...NE winds 20 to 30 kt. Seas 8 to 12 ft.

.From 08n to 20n W of 115w NE to E winds 20 to 25 kt. Seas to 9 ft. .24 hour forecast from 07n to 22n W of 125w NE winds 20 to 25 kt. Seas 8 to 11 ft. .48 hour forecast from 07n to 23n W of 130w NE winds 20 kt. Seas 8 to 11 ft with NW swell.

.NW of line from 30n137w to 27n140w winds less than 20 kt. Seas 8 to 11 ft in NW swell. .24 hour forecast N of 28n between 120w and 128w N winds 20 kt. Seas 8 to 10 ft. Elsewhere NW of line from 30n122w to 22n140w winds less than 20 kt. Seas 8 to 11 ft in NW swell. .48 hour forecast NW of line from 30n116w to 20n125w to 23n140w winds less than 20 kt. Seas 8 to 11 ft in NW swell.

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

.Convection valid 2130 UTC Thu Nov 20. .intertropical convergence zone...07n77w to 07n110w to 08n140w. Scattered moderate within 60-90 nm N of axis between 101w and 113w.

$$ .Forecaster Cobb. Tropical Prediction Center.