000 AXPZ20 KNHC 170339 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Thu Sep 17 2020 Tropical Weather Discussion for the eastern Pacific Ocean from the Equator to 32N, east of 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 0250 UTC. ...SPECIAL FEATURES... Post-Tropical Cyclone Karina is located near 23.3N 125.0W 1006 mb at 0300 UTC moving NW at 7 kt. Maximum sustained winds 30 kt gusts 40 kt. Convection associated with Karina remains minimal, with weak to moderate convection lingering within 200 nm across the NW quadrant. Karina will become a remnant low near 23.7N 125.9W Thu morning with winds of 30 kt, and continue to gradually weaken through late Fri as it then moves slowly W then SW. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/MIATCPEP1.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMEP1.shtml for more details. ...TROPICAL WAVES... A tropical wave is along 109W-110W N of 04N, moving W at around 10 kt. Associated convection is described below. This wave will drift west over the next 24 hours and gradually become absorbed in a low to mid level trough located just to its west. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10.5N73W to 10N84W to 14N97W to 11N116W to 16N124W to 13N140W. Scattered moderate to strong convection noted from 05N to 09N between 85.5W and 91W. Scattered moderate isolated strong convection elsewhere from 08N to 12N between 81W and 99W, and within 180 nm either side of line from 21N106W to 07.5N117W. Scattered moderate convection noted from 12.5N to 15N west of 134W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please see the Special Features section above for more details on Tropical Depression Karina. South to southwest swell from Karina will continue to spread north and northeastward across the offshore waters of Baja California through early Thu. Weak high pressure will maintain moderate northerly winds and seas across the offshore waters of Baja California Norte through Sun. Farther south, a weak trough will develop well offshore of Cabo Corrientes. This will maintain light to gentle winds and slight seas through Sun. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Gentle to moderate S to SW winds persist south of the monsoon trough. Elsewhere, gentle winds prevail north of the monsoon trough. Combined seas are currently in the 4-7 ft range in a mix of wind waves and S to SW swell, except 5 to 8 ft south of the equator. Seas may build S of Panama by late Thu in southerly swell. REMAINDER OF THE AREA... Please see the Special Features section above for more details on Tropical Depression Karina. Karina will continue moving westward overnight then veer southwestward late Thu and dissipate into a trough Fri through Sat. A stationary front is over the NW waters from 32N129W to beyond 26N140W where it continues as a dissipating stationary front. Light SW winds are ahead of the front. The front will drift E-SE during the next couple of days before dissipating. Light to moderate NE trades prevail across the waters SW of Karina and north of the monsoon trough. Combined seas are generally 4-7 ft. A broad area of fresh monsoonal flow prevails south of the monsoon trough between 105W to 110W, with seas generally 7-8 ft in this region. This will persist through Fri. $$ Stripling