000 AXPZ20 KNHC 091557 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Mon Aug 9 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 1545 UTC. ...SPECIAL FEATURES... Tropical Storm Kevin is centered near 16.6N 111.5W at 09/1500 UTC moving WNW at 7 kt. Estimated minimum central pressure is 1001 mb. Maximum sustained wind speed is 45 kt with gusts to 55 kt. Latest satellite imagery continues to reveal that Kevin is a sheared system, with numerous strong convection within 270 nm of the center in the SW quadrant and 240 nm from the center in the NW quadrant. Scattered moderate to isolated strong convection is seen from 13N to 21N between 103W-110W. Kevin is forecast to maintian its current motion during the next few days. Kevin is forecast to strengthen slightly near 17N113W this evening. Expect wave heights to build within the forecast area of Kevin. In addition, swells generated by Kevin are affecting portions of the coast of southwestern Mexico, and are expected to spread northward to the coast of Baja California Sur through Tue. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. For more details on Kevin, please read the latest HIGH SEAS FORECAST issued by the National Hurricane Center at website- https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml and the latest Kevin NHC Forecast/Advisory and Public Advisory at www.hurricanes.gov. A broad area of low pressure located a few hundred nm south of the Gulf of Tehuantepec near 12N98W continues to produce disorganized scattered moderate to isolated strong convection from 08N-16N between 93W-101W. Environmental conditions are conducive for development of this disturbance, and a tropical depression is expected to form within the next couple of days. This system is forecast to move westward to west-northwestward at about 10 kt through mid-week, parallel to and offshore of the coast of southern Mexico. It has a high chance of becoming a tropical cyclone during the next 48 hours. Please refer to the latest NHC Tropical Weather Outlook at www.hurricanes.gov for more details. ...TROPICAL WAVES... A tropical wave has its axis along 128W from 03N to 22N, moving westward at 10 kt. No significant convection is associated with the wave. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 08N78W to 10N92W to low pressure near 12N98W and to 14N106W, where it briefly pauses. It resumes at 14N117W to 10N131W. ITCZ extends from 10N131W to beyond 08N140W. Aside from the convection described above, scattered moderate to isolated strong convection is within 240 nm south of the trough between 101W-104W and within 120 nm south of the trough between 82W-86W. Scattered moderate convection is within 60 nm south of the trough between 121W-131W and within 60 nm south of the ITCZ between 131W-140W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please refer to the Special Features section above for details on Tropical Storm Kevin and on a broad area of low pressure a few hundred miles offshore the coasts of southern Mexico and Guatemala. Gentle to moderate northwest winds off the Baja Peninsula coast and north of Cabo San Lazaro will change little through mid-week. South of Cabo San Lazaro to near 22N, gentle to moderate northwest winds will change little through late tonight, then weather and marine conditions over those waters will deteriorate through late Wed as Kevin approaches from the SE. Otherwise, moderate to fresh southeast winds in the northern Gulf of California will continue through Mon, then develop over the central and southern sections of the Gulf of California Tue as Kevin approaches from the SE. These winds shift northward to the northern Gulf of California Wed as Kevin pulls away from southern Baja California. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Please refer to the Special Features section above for details on a broad area of low pressure a few hundred miles offshore the coasts of southern Mexico and Guatemala. Moderate to fresh winds will continue in the Papagayo region through Tue afternoon, then become mainly fresh winds through late in the week. Moderate to locally fresh south to southwest winds south of the monsoon trough are expected to diminish to moderate winds by late today. Otherwise, long-period southwest swell will reach the Central America offshore waters Tue night and continue through next weekend. REMAINDER OF THE AREA... Refer to the Special Features section above for details on Tropical Storm Kevin. High pressure ridging extends over the waters west of 125W and north of 16N, where gentle to moderate northeast winds prevail. Wave heights of 4 to 5 ft prevail over these waters. Weather and marine conditions west of 120W will start to deteriorate by mid- week as Kevin starts to move out of the Baja California Sur offshore waters. Otherwise, a broad area of low pressure is located a few hundred miles offshore of the coasts of southern Mexico and Guatemala. Environmental conditions are expected to be conducive for development of this disturbance, and a tropical depression is likely to form during the next couple of days. This system has a high chance of tropical cyclone formation during the next 2 days. $$ Aguirre