000 AXPZ20 KNHC 061534 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Fri Aug 6 2021 Tropical Weather Discussion for the eastern Pacific Ocean from 03.4S to 30N, east of 120W including the Gulf of California, and from the Equator to 30N, between 120W and 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 1200 UTC surface analysis and satellite imagery through 1550 UTC. ...SPECIAL FEATURES... Tropical Storm Jimena is centered near 17.5N 139.3W at 06/1500 UTC moving WNW at 8 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 35 kt with gusts to 45 kt. Peak seas are currently to 12 ft. Scattered moderate convection is from 11N to 14N between 139W and 142W. Steady weakening is forecast during the next couple of days, and Jimena is expected to degenerate into a remnant low Saturday morning. 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 its axis along 81W from 01N northward to across Costa Rica, moving W at 10 to 15 kt. Scattered moderate convection prevails north of 03N between 75W and 88W. A tropical wave extends its axis along 102W, from 02N northward, moving W at 10 to 15 kt. Scattered moderate convection is noted north of 13N between 98W and 103W. A tropical wave extends its axis along 117W, from 01N to 18N, moving W at 10 to 15 kt. Scattered showers are noted from 08N-14N where the wave meets the monsoon trough. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10N85W to 13N110W to 09N122W. The ITCZ extends beyond 14N140W. Aside from the convection related to the tropical waves described above, scattered moderate convection is noted within 180 nm on either side of the monsoon trough and east of 115W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Moderate NW winds are occurring offshore Baja California Norte. Fresh southerly winds are occurring in the northern Gulf of California, with moderate in the central Gulf of California. Seas are 2 to 4 ft, locally to 6 ft, in the northern Gulf of California. Gentle to moderate winds prevail elsewhere, with seas of 4 to 7 ft in mixed swell, except 5 to 7 ft offshore of Baja California Norte. For the forecast, fresh southerly winds will pulse over the northern Gulf of California today and Sat, then moderate winds will prevail. A moderate northerly swell will impact the waters offshore of Baja California Norte through today. A broad area of low pressure is expected to develop a few hundred nautical miles offshore of the southwestern coast of Mexico by late this weekend. Environmental conditions are forecast to be conducive for some gradual development thereafter, and a tropical depression could form early next week while the system moves west-northwestward at 10 to 15 kt, parallel to and offshore of the coast of southwestern Mexico. Associated conditions may impact the Revillagigedo Islands early next week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Gentle to moderate south-southwest winds are occurring south of the monsoon trough. To the north of the monsoon trough, gentle winds prevail, with some locally moderate winds near the Papagayo region. Seas are in the 3 to 5 ft range in long period mixed swell. For the forecast, surges of locally fresh winds are likely over the offshore waters north of Costa Rica during the overnight hours through the weekend as convection over Central America propagates offshore. Otherwise, fairly tranquil winds should prevail through the forecast period. A moderate southerly swell may propagate across the waters west of Ecuador during the weekend, with another set early next week. REMAINDER OF THE AREA... See the Special Features section above for details on Tropical Storm Jimena. Post-Tropical Cyclone Hilda is centered near 23.1N 134.1W at 06/1500 UTC moving WNW at 9 kt. Estimated minimum central pressure is 1008 mb. Maximum sustained wind speed is 25 kt with gusts to 35 kt. Further weakening is expected and the remnant low is forecast to open up into a trough of low pressure on Saturday. Elsewhere, a surface ridge prevails over the northern open waters. Mainly moderate to fresh N-NE trades are noted under the ridge and north of the convergence zone, with gentle to moderate flow, locally fresh, south of the convergence zone. Seas are 5 to 8 ft in mixed long period swell outside of the systems. For the forecast, winds and seas over some sections of the area, mainly N of 15N and W of 130W, will be impacted by the tropical systems detailed in the Special Features during the next several days, with conditions gradually improving through the weekend. $$ Ramos