000 AXPZ20 KNHC 232130 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2015 UTC Tue Jul 23 2019 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 2100 UTC. ...SPECIAL FEATURE... Tropical Storm Dalila is centered near 19.1N 118.2W at 23/2100 UTC, moving toward the NW or 325 degrees at 7 kt. A turn toward the west-northwest is forecast on Wednesday and this motion should continue through Thursday night. The estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 35 kt with gusts to 45 kt. Weakening is forecast during the next couple of days, and Dalila is expected to become a tropical depression later tonight, and degenerate into a remnant low by Wednesday night. Currently, Dalila is experiencing wind shear from the N, and the center is totally exposed. Most of the remaining convective activity is noted within about 120 nm S semicircle. A recent scatterometer pass confirmed the presence of 35 kt winds on the E semicircle of Dalila. Please see the latest NHC forecast/advisory under AWIPS/WMO headers MIATCMEP5/WTPZ25 KNHC or at website htpps://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for further details ...TROPICAL WAVES... A tropical wave is along 95W from 04N to 16N, moving west around 10 kt. Scattered moderate convection is noted on either side of the wave axis. A tropical wave is along 105W from 06N to 17N, moving W around 10 kt. Scattered m moderate convection is observed from 13N to 17N between 101W and 105W. Another tropical wave is along 132W moving west around 10 kt. Scattered moderate convection is seen where the wave meet the monsoon trough. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N85W to 10N95W to 08N105W to 10N110W. Then, continues W of T.S. Dalila from 12N124W to a 1012 mb low pressure located near 08N137W. The ITCZ continues from 08N137W to beyond 06N140W. Outside of the convection associated with the tropical waves and T.S. Dalila, scattered moderate to isolated strong convection is from 06N to 09N between 135W and 139W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Fresh S winds and seas to 9 ft are impacting the waters around Clarion Island as Tropical Storm Dalila crosses to the W of the island. A weak ridge will dominate the offshore forecast waters W of Baja California through Fri. Light to gentle southerly winds are expected across the Gulf of California during the next several days. Northerly winds will increase to a fresh to strong breeze across the Tehunatepec region by late Thu night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Moderate to locally fresh S to SW winds south of the monsoon trough will generally maintain seas of 5 to 7 ft off the coasts of Panama and Colombia through Fri. Seas will also build to near 8 ft over the equatorial waters Thu and Fri as long-period S swell moves into the region. Fresh to strong gap winds will return to the Gulf of Papagayo by Thu night in the wake of a passing tropical wave. REMAINDER OF THE AREA... A ridge dominates most of the forecast waters N of 18N W of 120W. Recent scatterometer and altimeter satellite passes indicate moderate to fresh trade winds from 16N to 21N west of 135W with seas to 8 ft in mixed swell. A recent altimeter pass provided observations of 8 to 10 ft seas S of 09N between 128W and 136W where fresh SE winds are blowing. Another round of long period southerly swell will cause seas to build to around 8 ft along the Equator to the S of the Galapagos Islands Wed night into Thu. $$ GR