Tropical Weather Discussion...Corrected
Status
Issued Active alertStart Time
Thu 11/06/2025 05:05 AM ESTEnd Time
Thu 11/06/2025 11:05 AM ESTImpacts
Informational
Full Alert Message
Tropical Weather Discussion...Corrected NWS National Hurricane Center Miami FL 1005 UTC Thu Nov 06 2025 Corrected Remainder of the Area section Tropical Weather Discussion for the eastern Pacific Ocean from 03.4S to 30N, east of 120W including the Gulf of California, and from the Equator to 30N, between 120W and 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 0600 UTC surface analysis and satellite imagery through 930 UTC. ...SPECIAL FEATURES... NW Significant Swell Event: Large long-period NW swell generated by a storm force low well north of the area is propagating across the far NW discussion waters, with wave periods of 12 to 14 seconds. Currently, seas over the discussion waters with this swell are peaking near 15 ft (4.5 M). Seas greater than 12 ft will continue across the waters N of 26N and W of 120W into tonight before subsiding below 12 ft. Mariners should use extreme caution in this area, depending on vessel type and cargo. Please read the latest HIGH SEAS FORECAST issued by the National Hurricane Center at website - https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from northern Colombia southwestward to 07N78W to 08N90W to 07N97W to 08N106W to low pressure near 11N120W 1013 mb and to 09N130W, where it transitions to the ITCZ to beyond 08N140W. Scattered moderate to isolated strong convection is seen within 60 nm of the trough between 121W-123W. Scattered moderate convection is from 08N TO 09.5N between 120W-123W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Fresh to strong north to northeast winds, and seas of 6 to 8 ft, are over and downstream the Gulf of Tehuantepec as indicated by overnight scatterometer and altimeter satellite data passes. Gentle to moderate winds prevail west of the Baja California peninsula. Light to gentle winds are over the remainder of the discussion waters, including in the Gulf of California. Seas are in the 6 to 8 ft range west of the Baja California peninsula, and 4 to 7 ft over the remainder of the open waters off Mexico. Seas are 3 ft or less in the Gulf of California. For the forecast, the fresh to strong winds in the Gulf of Tehuantepec will diminish through Fri. A set of large northwest swell will enter the waters N of Punta Eugenia today. The swell will propagate through the remainder of the offshore waters of Baja California through Fri night, then subside during the weekend. The next gap wind event for the Gulf of Tehuantepec region is expected to begin Sun night, with winds possibly reaching gale-force by early Mon morning. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gentle to moderate northeast to east winds are in the Gulf of Papagayo region as was noted in an overnight scatterometer satellite data pass. Light to gentle winds prevail elsewhere N of the monsoon trough. Gentle to moderate winds are S of the monsoon trough. Seas are in the 4 to 6 ft range over the discussion waters per latest altimeter satellite data passes. For the forecast, the gentle to moderate northeast to east winds in the Gulf of Papagayo region will become light and gentle on Fri and change little through Sun. Moderate to fresh northeast winds are then expected in the Gulf of Papagayo region starting Sun night. Otherwise, relatively quiet conditions are then expected throughout the region for the much of the remainder of the forecast period. ...REMAINDER OF THE AREA...Corrected Please see SPECIAL FEATURES section above for details on a large set of NW swell is moving through the far NW discussion waters that will continue over the northern waters through tonight before subsiding. A weakening frontal trough is analyzed over the NW waters along a position from near 30N129W to 27N140W. It is followed by a large set of long-period NW swell as discussed above in the Special Features section. High pressure dominates the remainder of the waters N of about 20N, anchored by a 1025 mb high centered near 27N184W. Light to gentle winds are in the vicinity of the high center and that of the trough as seen in overnight scatterometer satellite data passes. The pressure gradient between the area of high pressure and lower pressure within the monsoon trough, and in the vicinity of the ITCZ is supporting moderate to locally fresh trade winds from 10N to 20N and west of 128W, and from 11N to 20N between 120W and 128W. An overnight scatterometer satellite data pass indicates fresh to strong trades from 10N to 18N west of 128W. Moderate to fresh southerly winds prevail south of the monsoon trough/ITCZ. Seas are in the 8 to 9 ft range from 10N to 20N and W of 110W in a mix of subsiding NW swell and NE wind waves. An altimeter satellite data pass from 02Z revealed these seas. Seas of 6 to 8 ft are elsewhere. For the forecast, the aforementioned frontal trough will dissipate today. The NW swell over the NW waters will propagate southeastward during the rest of the week, with seas greater than 8 ft covering much of the waters N of 10N and W of 113W by Fri evening before starting to slowly subside. Another set of NW swell will begin to move into the NW waters on Sun and into early next week. The moderate fresh southerly winds south of the monsoon trough are expected to become more persistent at fresh speeds beginning tonight east of about 115W before diminishing to gentle to moderate speeds on Sat.