000 AXPZ20 KNHC 200306 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Fri Aug 20 2021 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 0300 UTC. ...SPECIAL FEATURES... Linda is in the central Pacific region. Future information on Linda can be found in Public Advisories issued by the Central Pacific Hurricane Center beginning at 5 PM HST/0300 UTC, under AWIPS header HFOTCPCP3 and WMO header WTPA33 PHFO. Products will continue to be available on the web at hurricanes.gov ...TROPICAL WAVES... A tropical wave extends from 02N to 15N with axis near 96W, moving W around 10 kt. Scattered moderate convection is from 07N to 13N between 91W and 98W. A tropical wave extends from 07N to 20N with axis near 110W, moving W at 5-10 kt. Scattered moderate convection is from 10N to 15N between 106W and 116W, and from 17N to 20N between 105W and 109W. A tropical wave extends from 05N to 19N with axis near 124W, moving W at 10 kt. Scattered moderate convection is from 10N to 14N between 118W and 126W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10N85W to 16N104W to 11N120W to 11N140W. Aside from the convection described in the Tropical Waves section, scattered moderate convection is N of 04N E of 90W, and from 08N to 15N W of 128W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A weak pressure gradient across the region continues to support light to gentle NW winds along the Baja California offshore waters with seas ranging between 5 to 7 ft as indicated by recent altimeter data. Light to gentle variable winds is elsewhere from Tehuantepec to the entrance of the Gulf of California with seas to 6 ft. A surface trough along the northern Gulf of California supports moderate S to SW winds with seas to 3 ft. Similar conditions are forecast to remain in place through Sat. On Sat evening, winds across the Baja and Colima offshores will increase to moderate to fresh ahead of the remnant low of current Tropical Storm Grace, which is forecast to be near 19.6N 100.5W Sat evening. On Sun, the remnants of Grace are expected to continue westward and emerge over the eastern Pacific Ocean off the west-central coast of Mexico. Environmental conditions are forecast to be conducive for development, and a tropical depression is likely to form late this weekend or early next week while the system moves westward away from the coast of Mexico. Regardless of development, strong winds and building seas will affect the offshore waters of Colima, Nayarit, and Baja California Sur Sun through Tue. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Gentle to moderate winds will persist over the offshore waters of Central American and Equatorial waters through Sun. Seas of 6-8 ft in SW swell are expected across the waters between Ecuador and the Galapagos Islands tonight and Fri. A developing low pressure along the monsoon trough may bring some increase in winds and seas across the offshore waters of Guatemala and El Salvador early next week. Gentle to moderate SW winds are noted per scatterometer data S of the monsoon trough while mainly light winds are observed N of it. Seas are generally in the 5-7 ft range in long period SW swell. Little change in these marine conditions are expected on Fri. Moderate to locally fresh SW winds are forecast S of the monsoon trough during the upcoming weekend. REMAINDER OF THE AREA... Please read the Special Features section for details on T.S. Linda. Elsewhere, a ridge extending from a 1036 mb high near 44N144W dominates most of the northern forecast waters N of 20N and W of 120W. This system is promoting generally moderate or weaker winds north of the monsoon trough. SW winds equatorward of the monsoon trough are moderate to fresh. Seas of 8-9 ft mainly due to SW swell are generally noted from 09N to 12N between 105W and 115W. Northerly swell, with building seas of 8-9 ft, is propagating across the N waters particularly N of 27N between 121W and 135W. For the forecast away from Linda, no significant changes to the winds over the open Pacific are expected for the next several days. Northerly swell will continue to propagate across the north-central waters during the next 48 hours with seas in the 8-9 ft range. $$ Ramos