000 AXPZ20 KNHC 072133 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2106 UTC Fri Jul 7 2017 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 2145 UTC. ...SPECIAL FEATURE... The broad low pressure area embedded within the monsoon trough has developed further and is now Tropical Storm Eugene, the fifth named system of the 2017 East Pacific season. At 07/2100 UTC Eugene was centered near 11.9N 111.2W, or about 665 NM south of the southern tip of the Baja Peninsula. Maximum sustained winds are 35 KT with gusts to 45 KT. Estimated minimum central pressure was 1006 MB. Eugene was moving NW or 310 degrees at 7 KT. Scattered moderate and isolated strong convection is noted within 240 NM of the center of Eugene. Visible and infrared satellite imagery shows increasingly cyclonically curved convective bands around the circulation center in an area of low vertical shear. This environment will remain favorable for Eugene to strengthen, and the system is forecast to become a hurricane within 48 hours. For addition information please refer to the latest NHC forecast/advisory under AWIPS/WMO headers MIATCMEP5/WTPZ25 KNHC. ...TROPICAL WAVES... A tropical wave extends from the Yucatan Peninsula to the EPAC waters near 13N91W, moving west at 15-20 KT. Scattered showers and thunderstorms are observed along the wave's axis mainly over the Yucatan Peninsula and Guatemala. A tropical wave earlier from inland Mexico to the adjacent East Pacific waters has become absorbed into the circulation of newly developed tropical storm Eugene and will dropped from the 0000 UTC surface analysis. A tropical wave extends from 21N128W to a 1011 MB low near 18N129W to 15N129W, moving west at 10-15 KT. No significant convection was noted in association with the low and the wave. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The axis of the Monsoon Trough extends from 09N84W to 09N95W to 12N105W then resumes from 10N115W to 13N127W to 09N140W. Scattered moderate to strong convection was was noted within 180 NM S of the axis between 80W and 85W. Scattered moderate isolated strong convection was noted within 180 NM N of the axis between 90W and 106W, and 180 NM either side of the axis between 127W and 140W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A ridge extends across the waters W of Baja California from 30N128W to 20N115W. Gentle to moderate N-NW flow prevails W of the Baja California peninsula, moderate to fresh N winds in the Gulf of Tehuantepec, and light to gentle winds across the Gulf of California. Seas are ranging 4-6 ft in the open waters W of Mexico, with 1-3 ft seas in the Gulf of California. Nocturnal winds will pulse to a max of 20 kt each night in the Gulf of Tehuantepec, then diminish during the day. Tropical storm Eugene should begin to impact the PMZ015 offshore waters zone early on Sunday into Monday. Little change is expected elsewhere. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Moderate to locally fresh nocturnal winds are expected in the Gulf of Papagayo for the weekend. Gentle to moderate southerly winds are expected S of the Monsoon Trough. Long period cross- equatorial S to SW swell and seas to 6-8 ft W of Colombia and Ecuador will continue gradually subsiding today and into the weekend. REMAINDER OF THE AREA... See the Special Feature section for more information on newly formed T.S. Eugene. Outside of this area, gentle to moderate trade winds will prevail N of the Monsoon Trough, while moderate to fresh southerly winds will be S of the trough axis. Seas will be generally 5-7 ft. These conditions are expected to continue through the weekend. $$ Cobb