000 AXPZ20 KNHC 122042 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2040 UTC Fri Jun 12 2020 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 2040 UTC. ...TROPICAL WAVES... The axis of a tropical wave is near 80W, moving west near 10 kt. Scattered moderate convection was noted within 90 NM of the wave axis. The axis of a tropical wave is near 94/95W, moving west around 10 to 15 kt. Scattered moderate isolated strong convection is from 03N to 14N between 94W and 100W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from near 10N86W to 10N119W. The ITCZ continues from 10N119W to 1011 mb low pressure near 11N133W to beyond 10N140W. Scattered moderate convection is noted from 02N to 09N E of 90W. Scattered moderate isolated strong convection is noted from 03N to 14N between 94W and 100W, from 03N to 11N between 100W and 120W, and from 06N to 11N between 125W and 140W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... The latest ASCAT pass showed that winds have diminished below gale force in the Gulf of Tehuantepec, with winds in the 20 to 30 kt range. Seas in this area are in the 8 to 11 ft range. Strong to near gale- force northerly gap winds will persist in the Gulf of Tehuantepec region through early next week. A weak high pressure ridge persists across the waters north of 20N. Outside of the Gulf of Tehuantepec, a weak pressure pattern prevails. Latest ASCAT pass indicates light to gentle winds prevail across the forecast waters. Wave heights are generally 4-6 ft over the offshore waters, and 3 ft or less inside the Gulf of California. Winds off Baja California will strengthen tonight into this weekend as a reinforcing high pressure ridge builds eastward over the region. A brief period of fresh SW gap winds is expected tonight over the northern Gulf of California. Increasing NW swell will build wave heights to 8-9 ft in the Baja California Norte waters this weekend. Marine conditions will improve early next week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... This afternoon's ASCAT pass indicates moderate to locally fresh S to SW flow prevails south of the monsoon trough. Long-period southerly swell persists across the offshore waters this afternoon with wave heights of 7-8 ft. North of the monsoon trough, winds remain mainly gentle to moderate, with seas in the 5-7 ft range in southerly swell. Cross-equatorial S to SW swell will gradually decay tonight. Fresh winds will pulse across the Papagayo region through early next week. Wave heights will briefly subside this weekend, before another set of southerly swell crosses the region late Sun through Mon, then decaying Tue before the next set arrives later in the week. REMAINDER OF THE AREA... A broad high pressure ridge remains across the forecast waters roughly north of 20N and west of 100W. The pressure gradient between this area of high pressure and lower pressure in the vicinity of the ITCZ is supporting moderate to fresh trades N of the ITCZ to near 10N and W of 120W. Seas over this area are in the 7 to 10 ft range. Gentle to moderate winds prevail N of 20N, with seas in the 5-6 ft range. Little change is expected over the next couple days as a weak low pressure or a trough moves along the ITCZ and supports fresh to locally strong winds and locally higher seas west of 135W. Farther east, moderate to locally fresh southerly flow prevails south of the monsoon trough/ITCZ. Long-period southerly swell still dominates the waters south of 15N and east of 110W, with 7-8 ft seas south of the monsoon trough E of 110W. This swell will gradually decay over the next couple days, with wave heights subsiding below 8 ft by Sat. $$ AL