000 AXPZ20 KNHC 292127 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Mon Jul 29 2024 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 1800 UTC surface analysis and satellite imagery through 2100 UTC. ...SPECIAL FEATURE... A broad area of low pressure located a few hundred miles south of the southern coast of Mexico continues to produce scattered showers and thunderstorms from 09N to 15N between 94W and 103W. This system is analyzed as a tropical wave along 98W and N of 08N, with low pres centered near 12N98W, 1011 mb. Recent scatterometer wind data depict that the circulation has become better defined today. Environmental conditions appear conducive for further development of this system, and a tropical depression is likely to form within the next few days. The wave/low are forecast to move westward to west-northwestward at 10 to 15 kt during the next several days, remaining offshore of the southern coast of Mexico. This system has a medium chance for tropical formation in 48 hours, and a high chance within the next 7 days. ...TROPICAL WAVES... A tropical wave is near 123W from 07N to 18N, moving west around 10 to 15 kt. A 1011 mb low pres is analyzed near 11N123W. Scattered moderate convection is noted from 07N to 16N between 121W and 125W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10N85W to 11N140W. Aside from the the convection related to the Special Feature and the tropical wave described above, scattered moderate convection is noted from 08N to 15N between 100W and 120W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Refer to the Special Features section above for details on the tropical wave/low along 98W. Winds are moderate or weaker across the offshore waters of Mexico, except for the area near Guerrero where scattered showers and thunderstorms associated with the Special Feature wave/low tropical wave may induce gusty winds and rough seas. Seas off the Baja California are 4-6 ft in NW swell. Seas are 4-5 ft in SW swell over the SW Mexican offshore waters, except in the area mentioned above. In the Gulf of California, winds are light to gentle and seas are slight. For the forecast, outside of the Special Feature wave/low, moderate to fresh N winds will pulse in the Gulf of Tehuantepec, locally strong at times, through the week. Winds will be mainly moderate or weaker elsewhere, fresh at times offshore Baja California Norte. Little change in seas is expected. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Moderate to fresh NE winds are ongoing in the Papagayo region with seas to 6 ft. Winds are moderate or weaker elsewhere. Seas are 3-5 ft in SW swell from offshore Colombia and Panama to Costa Rica, and 5-6 ft elsewhere. For the forecast, moderate to fresh winds will continue to pulse in the Gulf of Papagayo through Wed night. Elsewhere, gentle to moderate winds and moderate seas will persist through the end of the forecast period with little change in seas. Looking ahead, an area of low pressure is forecast to form offshore of the coast of Central America and southern Mexico later this week. Environmental conditions appear conducive for gradual development of this system, and a tropical depression could form towards the end of the week or this weekend. The system is forecast to move westward to west-northwestward at 10 to 15 kt during the next several days, remaining offshore. ...REMAINDER OF THE AREA... Refer to the sections above for details on the Special Feature system and the tropical wave/low analyzed along 123W. Moderate to fresh SE to S winds and seas up to 8 ft are south of the monsoon trough between 105W and 135W. Moderate northeast winds are in the vicinity of a surface trough, analyzed from 11N to 18N and along 130W. Winds are light to moderate elsewhere, along with seas of 5-7 ft. For the forecast, moderate to fresh southerly winds and seas of around 8 ft will persist across the central waters south of the monsoon trough/ITCZ through the week. Winds may freshen north of the monsoon trough/ITCZ toward the end of the week also building seas to around 8 ft. Looking ahead, the low/tropical wave along 123W continues to produce disorganized showers and thunderstorms. Gradual development of this system is possible during the middle and latter parts of the week while it moves westward to west- northwestward at about 10 kt across the western portion of the basin. $$ ERA