000 AXPZ20 KNHC 292202 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2112 UTC Sat Aug 29 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 2115 UTC. ...SPECIAL FEATURES... Tropical Storm Iselle is centered near 21.0N 114.5W at 29/2100 UTC moving NNE at 6 kt. Estimated minimum central pressure is 1002 mb. Maximum sustained wind speed is 40 kt with gusts to 50 kt. Numerous moderate isolated strong convection is from 19N to 21N between 114W and 118W. Scattered moderate convection is elsewhere from 15N to 22N between 114W and 119W. A turn toward the north is expected during the next several hours with this motion expected to continue through Sunday. This should be followed by a turn to the northwest. Satellite imagery indicates that Iselle is becoming less organized, and it is expected to weaken to a depression late tonight or on Sunday. The depression should then degenerate into a remnant low later Sunday or Sunday night. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/MIATCPEP4.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMEP4.shtml for more details. ...TROPICAL WAVES... A tropical wave extends N of 08N with axis near 99W, moving westward at around 10-15 kt. Scattered moderate convection is from 11N to 18N between 97W and 105W. A tropical wave extends N of 04N with axis near 85W, moving west at about 10 kt. Scattered moderate convection is N of 04N E of 92W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough emerges off of Central America near 10N86W to 17N102W, then resumes west of T.S. Iselle near 15N120W to 12N130W to 11N140W. Scattered moderate convection is within 90 nm N and 210 nm S of the boundary. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Tropical Storm Iselle near 21.0N 114.5W 1002 mb at 2 PM PDT moving NNE at 6 kt. Maximum sustained winds 40 kt gusts 50 kt. Iselle will move to 22.1N 114.5W Sun morning, weaken to a tropical depression near 23.4N 114.8W Sun afternoon, become a remnant low and move to 24.2N 115.3W Mon morning, 24.8N 115.6W Mon afternoon, 25.4N 116.0W Tue morning, and dissipate Tue afternoon. Please see the Special Features section for further details on Tropical Storm Iselle. An elongated area of low pressure over the SW CONUS extending to the northern Gulf of California will slightly deepen and continue to support fresh to strong SE winds in that region through tonight. Expected seas are near 7 ft. Otherwise, light to gentle variable winds will dominate the remainder offshore waters through the middle of the week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Light to gentle variable winds will dominate the waters N of the monsoon trough, except for moderate wind pulses off the Gulf of Papagayo at night. South of the monsoon trough, moderate south- southwest flow will be dominant through the middle of the week. REMAINDER OF THE AREA... Moderate to locally fresh NE winds will dominate across the forecast waters N of 10N W of 130W around a nearly stationary surface ridge through Mon. Winds then will gradually diminish through the middle of the week as Iselle dissipates and the pressure gradient across the area diminishes. Otherwise, northerly swell will support seas to 9 ft across the northern waters Mon evening through Wed. $$ Ramos