000 AXPZ20 KNHC 070259 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Wed Sep 7 2022 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 0000 UTC surface analysis and satellite imagery through 0230 UTC. ...SPECIAL FEATURES... Hurricane Kay is centered near 19.5N 111.7W at 07/0300 UTC moving NW at 11 kt. Estimated minimum central pressure is 975 mb. Maximum sustained wind speed is 80 kt with gusts to 90 kt. Seas of 12 ft or greater extend outward from the center up to 360 nm, except 480 nm SE quadrant, with peak seas of around 33 ft. Numerous moderate to strong convection is noted from 09N to 21N between 108W and 120W. On the forecast track, the center of Kay is expected to pass to the west of the southern Baja California peninsula on Wednesday, and be near the west-central coast of the Baja California peninsula Thursday and Friday. Strengthening is forecast during the next 24 hours, and Kay could become a major hurricane during that time. Weakening is forecast to begin by Thursday, but Kay is forecast to remain a strong hurricane when it passes near the Baja California peninsula. Swells generated by Kay will continue to affect portions of the coast of southwestern Mexico during the next couple of days. Large swells are expected to spread northward along the Baja California coast and into the Gulf of California during the next few days. These swells will likely cause life-threatening surf and rip current conditions. Please consult products from your local weather office. Please read the latest High Seas Forecast issued by the National Hurricane Center at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml and the latest NHC Forecast/Advisory and Public Advisory at www.hurricanes.gov for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from the coast of Costa Rica near 09N84W to 09N98W. The monsoon trough resumes near 15N120W to beyond 13N140W. Aside from the activity related to Hurricane Kay, scattered moderate convection is noted from 06N to 13N between 91W and 98W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Refer to the Special Features section for details on Hurricane Kay. Outside of Kay, mainly winds are noted across the Mexico offshore waters east of 103W and off Baja California Norte. Mainly moderate SE winds are ongoing in the Gulf of California. Seas range 4-6 ft with 1-3 ft in the central and northern Gulf of California. Swells of 6 to 12 ft from Kay have progressed into the southern Gulf of California. For the forecast, expect marine conditions to continue to deteriorate for waters south and west of Baja California Sur as Hurricane Kay continues to strengthen as it moves north- northwestward. Conditions in the Gulf of California will also deteriorate significantly, where winds to tropical storm force and seas to 12 ft beginning on Wed night through the end of the week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gentle to locally moderate winds and moderate seas are noted S of the monsoon trough off Ecuador/southern Colombia and north of the Galapagos Islands. Light to gentle breezes and slight to moderate seas persist north of the monsoon trough. For the forecast, light to gentle winds are expected to prevail through tonight across the area. By early Wed, moderate to fresh southerly winds will develop south of the monsoon trough across the Ecuador and Galapagos Islands offshore waters. Seas are also expected to continue building through the rest of the week in this area, reaching near 8 ft by the end of the week. REMAINDER OF THE AREA... A 1010 mb low centered near 27N131W continues to slowly weaken. To the NW of this low, the gradient between the low and high pressure centered NW of the area are leading to moderate fresh NE winds and seas to 8 ft north of 27N between 132W-137W. Elsewhere, gentle to locally moderate winds are noted north of the monsoon trough, with slight to moderate seas. Fresh S to SW winds are evident south of the monsoon trough from 08N to 13N between 115W and 130W. Seas to 7 ft are noted in this area. Otherwise, gentle to moderate winds and moderate seas are noted. For the forecast, the seas north of 27N and W of 130W will gradually decay on Wed. Fresh SW winds and associated seas will persist south of the monsoon trough into late week as Hurricane Kay continues moving NNW in the Mexican offshore waters over the next few days. Farther south, the cross-equatorial swell will return tonight. Elsewhere, little change is anticipated into the weekend. $$ ERA