000 AXPZ20 KNHC 202157 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Sun Sep 20 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 1800 UTC surface analysis and satellite imagery through 2130 UTC. ...SPECIAL FEATURES... Tropical Depression Seventeen-E has developed over the east Pacific, with center near 15.8N 109.1W at 20/2100 UTC, moving W at 9 kt. Estimated minimum central pressure is 1005 mb. Maximum sustained wind speed is 25 kt with gusts to 35 kt. Scattered moderate convection is noted from 09N-20N between 103W-113W. The system is expected to turn toward the west-northwest at a slightly faster forward speed during the next few days. 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 has its axis from 17N132 to a 1009 mb low near 11N132W to 03N133W, moving westward at 10-15 kt. Scattered showers are noted within 60 nm around the low. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 12N86W to low pres near 15N108W 1005 mb (aka T.D. Seventeen-E) to low pres near 10N132W 1009 mb and to 10N140W. Scattered moderate convection is from 06N to 13N and E of 92W, and from 10N to 16N between 102W-112W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Weak deep layer ridging observed between Baja California and 125W is supporting moderate to fresh winds off Baja California Norte with combined seas to 7 ft. A recent ASCAT pass depicted northwest to north moderate to fresh winds mainly north of 28N. Winds and seas will diminish into early next week as the ridge weakens. Farther south, fresh to strong winds will pulse in the Gulf of Tehuantepec region through the next couple of days. Elsewhere, a weak pressure pattern across the region will result in mainly gentle to moderate winds and slight seas. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Gentle to moderate south to southwest winds continue south of the monsoon trough. Elsewhere, gentle winds prevail north of the monsoon trough. Combined seas are currently in the 5-6 ft range in a mix of wind waves and southerly swell. Scattered moderate convection continues along and just inland the majority of the Central American coast related to the monsoon trough. REMAINDER OF THE AREA... A surface trough along 134W from 20N to 24N is breaking up the subtropical ridge and supporting gentle moderate trade winds farther south into the deep tropics. The ridge will gradually build eastward north of 20N through mid week, and trades will strengthen somewhat between the ridge and the monsoon trough. Farther east, seas are in the 8-9 ft range in an area along the monsoon trough between 105W and 115W. These seas are enhanced by T.D Seventeen-E centered near 16N109W. Seas of 5-7 ft prevail elsewhere, as revealed by a recent altimeter data pass. $$ ERA