Superseded by next issuance in 6 hours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.
E Pacific from the Equator to 30n E of 140w and 03.4s to the Equator E of 120w
Synopsis valid 1800 UTC Tue Oct 25. 24 hour forecast valid 1800 UTC Wed Oct 26. 48 hour forecast valid 1800 UTC Thu Oct 27.
...Hurricane Warning... .Hurricane Seymour near 15.7n 116.4w 954 mb at 2100 UTC Oct 25 moving W or 275 deg at 12 kt. Maximum sustained winds 115 kt gusts 140 kt. Tropical storm force winds within 60 nm NW and se quadrants...70 nm NE quadrant and 40 nm SW quadrant. Seas 12 ft or greater within 180 nm N and 120 nm S semicircle with seas to 38 ft. Elsewhere within 150 nm of center except 100 nm SW quadrant winds 20 to 33 kt. Seas 8 to 12 ft. Remainder of area from 11n to 21n between 110w and 119w winds 20 kt or less. Seas 8 to 11 ft in mixed swell. .24 hour forecast Hurricane Seymour near 17.2n 120.3w. Maximum sustained winds 110 kt gusts 135 kt. Little change in radius of tropical storm force winds and seas 12 ft or greater...with seas to 36 ft. Elsewhere within 180 nm N and 120 nm S semicircles winds 20 to 33 kt. Seas 8 to 12 ft. Remainder of area from 10n to 23n between 115w and 126w winds 20 kt or less. Seas 8 to 11 ft in mixed swell. .48 hour forecast Hurricane Seymour near 19.9n 122.4w. Maximum sustained winds 80 kt gusts 100 kt. Tropical storm force winds within 70 nm NW and se quadrants...80 nm NE quadrant and 50 nm SW quadrant. Seas 12 ft or greater within 150 nm N semicircle and 90 nm S semicircle with seas to 28 ft. Elsewhere within 180 nm N and 120 nm S semicircles winds 20 to 33 kt. Seas 8 to 12 ft. Remainder of area from 13n to 25n between 117w and 131w winds 20 kt or less. Seas 8 to 11 ft in mixed swell. .72 hour forecast Tropical Storm Seymour near 21.0n 122.5w. Maximum sustained winds 40 kt gusts 50 kt. Extended outlook...use for guidance only...errors may be large. .96 hour forecast Post-tropical remnant low Seymour near 21.5n 123.5w. Maximum sustained winds 20 kt gusts 30 kt. .120 hour forecast...Dissipated.
Forecast winds in and near active tropical cyclones should be used with caution due to uncertainty in forecast track...size and intensity.
...Gale Warning... .Within 30 nm of line from 16n95w to 14n95.5w...including the Gulf of Tehuantepec...N to NE winds 25 to 35 kt. Seas 8 to 12 ft. Elsewhere within 60 nm of line from 16n95w to 12n96.5w N to NE winds 20 to 25 kt. Seas to 9 ft. .24 hour forecast little change. .48 hour forecast little change.
.Synopsis and forecast.
.cold front from 30n138w to 29n140w. Trough from 30n134w to 26n140w. N of 28n within 75 nm E of trough and N of 29n within 30 nm E of front SW winds 20 to 25 kt. Seas to 11 ft. Elsewhere NW of line from 30n129w to 26n140w winds 20 kt or less. Seas to 10 ft in NW swell. .24 hour forecast cold front from 30n131w to 23n140w. NW of line from 30n126w to 23n140w winds 20 kt or less. Seas to 11 ft in NW swell. .48 hour forecast dissipating cold front from 30n125w to 21n131w. W of line from 30n121w to 17n135w to 19n140w winds 20 kt or less. Seas to 10 ft in NW swell.
.Remainder of area winds 20 kt or less. Seas less than 8 ft.
Convection valid at 2100 UTC Tue Oct 25...
.Hurricane Seymour...Numerous moderate scattered strong within 75 nm of center. Scattered moderate to strong elsewhere within 120 nm of center.
.Intertropical convergence zone/monsoon trough... Monsoon trough from 10n85w to 08n100w to 10n106w. ITCZ from 10n132w to 10n140w. Scattered moderate from 05n to 08n between 94w and 106w.
$$ .Forecaster Mundell. National Hurricane Center.