000 AXPZ20 KNHC 180932 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Wed Aug 18 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 0600 UTC surface analysis and satellite imagery through 0900 UTC. ...SPECIAL FEATURES... Hurricane Linda is centered near 18.1N 130.7W at 18/0900 UTC moving W at 11 kt. Estimated minimum central pressure is 975 mb. Maximum sustained wind speed is 90 kt with gusts to 110 kt. Scattered to numerous moderate convection within 75 nm of the center. Slow weakening is forecast over the next several days, and Linda should remain a hurricane through Wednesday as it continues westward. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/MIATCPEP2.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMEP2.shtml for more details. ...TROPICAL WAVES... A tropical wave extends its axis along 90W and north of 05N, moving W at 5-10 kt. Scattered moderate to isolated strong convection is evident near the wave axis from 10N to 14N between 86W and 92W, mainly along the coasts of Nicaragua and Guatemala. A tropical wave extends its axis along 103W and north 02N into southern Mexico, moving W at 10 kt. Scattered moderate convection is noted from 13N to 15N between 100W and 102W. A tropical wave extends its axis along 116W north of 04N, moving W at 10 kt. Scattered showers are noted from 14N to 15N between 113W and 114W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N84W to 1010 mb low pressure near 14N98W to 1011 mb low pressure near 13N112W to 10N140W. Aside from the convection described in the Special Feature and Tropical Wave sections, no significant convection is evident along the monsoon trough at this time. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please read the Special Features section for details on Hurricane Linda. A scatterometer satellite pass from 05 UTC confirmed fresh westerly gap winds across the northern Gulf of California ahead of a surface trough off the coast of Baja California. This trough is ahead of a dissipating cold front off southern California. The scatterometer pass also showed moderate winds funneling off the Los Cabos, with generally light to gentle breezes elsewhere north of 20N. Earlier altimeter data showed 5 to 7 ft seas with SW swell. Farther south, light to gentle SW winds are noted south of Cabo Corrientes, with 3 to 5 ft in SW swell. Clusters of thunderstorms are ongoing off Cabo Corrientes. For the forecast, A surface trough off Baja California will move northeastward across the northern Gulf of California through Thu, supporting a small area of westerly fresh to occasionally strong gap winds over the far northern portion of the Gulf of California through tonight. Expect increased SW swell in the waters off southern Mexico by mid week, gradually subsiding into Sun. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... The monsoon trough extends from central Costa Rica northwestward 90 to 120 nm off the coast of northern Central America. Overnight drainage flow and passing tropical waves are supporting clusters of showers and thunderstorms off Nicaragua and Guatemala. Recent scatterometer satellite data depicted gentle to moderate SW flow across the region south of the monsoon trough. Seas are 4 to 6 ft in SW swell. For the forecast, gentle to moderate winds will persist through Sun south of 10N or more generally south of the monsoon trough. SW swell of at least 8 ft off Ecuador will move north and impact the waters off Central America through Thu, before gradually subsiding into Sun. REMAINDER OF THE AREA... Please read the Special Features section for details on Hurricane Linda. Earlier altimeter satellite data from 01 UTC confirmed rough seas reaching 8 to 10 ft from 05N to 12N between 95W and 110W in a surge of SW winds and swell. Reinforcing SW swell is also evident generally south of 05N between east of 115W. Elsewhere gentle to moderate southerly breezes and moderate SW swell are noted south of the monsoon trough. Gentle to moderate northerly flow is noted north of the monsoon trough outside of a roughly 240 nm buffer around Hurricane Linda. Seas are reaching 7 ft north of 28N between 120W and 130W in a mix of SW and northerly swell, with moderate seas elsewhere outside of Linda, except near 15N135W where another recent altimeter pass indicating seas to 8 ft. For the forecast, Hurricane Linda will continue to impact the region from roughly 15N to 20N west of 125W through Thu as it continues to move westward. Elsewhere, moderate to locally fresh NW winds will follow a trough moving into the waters off Baja California by mid week. Long period NW swell to 8 ft will also follow this trough, reaching as far south as 27N by early Thu. South of the monsoon trough and east of 110W, fresh to strong SW flow with reinforcing SW swell with seas to build to 9 ft will persist through mid week. $$ Christensen