000 AXPZ20 KNHC 282026 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Wed Aug 28 2019 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 2100 UTC. ...TROPICAL WAVES... A tropical wave is along 94W, N of 05N to near the Gulf of Tehuantepec region, moving W at 15-20 kt. Scattered moderate and isolated strong convection is noted from 05N to 14N between 91W and 97W. A tropical wave is along 106W, from 04N to 17N, moving W at 10-15 kt. Scattered moderate to strong convection is noted from 07N to 15N between 103W and 114W. A tropical wave is along 136W, from 01N to 15N, moving W at 10-15 kt. Scattered moderate and isolated strong convection is noted from 08N to 12N between 131W and 136W, and also from 04N to 08N between 136W and 140W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 1010 mb low pressure over northern Colombia near 09N74W to 07N82W to 10N94W to 11N104W to 10N115W to 09N133W. Numerous moderate to strong convection is noted N of 03N and E of 84W. Scattered moderate and isolated strong convection is noted from 04N to 08N between 84W and 91W, from 06N to 10N between 97W and 103W, from 05N to 10N between 115W and 123W, and also from 06N to 10N between 126W and 131W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... In the northern Gulf of California, moderate to fresh southerly winds are ongoing, between ridging across the area anchored by a 1018 mb high pressure area centered W of the area, and a relatively deep low pressure over the lower Colorado River valley. Winds will briefly increase to fresh to strong N of about 30N this evening into early Thu, then diminish as the low weakens. Elsewhere north of 20N, the ridge will maintain gentle to moderate winds. Seas off Baja California will remain 4 to 6 ft with a component of SW to W swell. Farther south, high pressure over the Gulf of Mexico will support pulses of fresh to strong gap winds through the Gulf of Tehuantepec through the period, mainly during the overnight and early morning hours. Seas will increase to 6 to 8 ft at the peak of these winds each early morning. Offshore WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... A large area of showers and thunderstorms persists over the Gulf of Panama and off the Pacific coast of Colombia. Elsewhere fresh to strong NE to E gap winds in the Gulf of Papagayo will diminish this afternoon, then pulse again to fresh to strong tonight into early Thu, with weaker winds thereafter. Light to gentle winds are expected elsewhere N of the monsoon trough, with gentle to moderate S to SW winds S of the monsoon trough. No significant southerly swell is anticipated through the remainder of the week and the upcoming weekend. REMAINDER OF THE AREA... Broad 1018 mb high pressure is centered near 27N130W. Recent and earlier scatterometer data showed mainly gentle to moderate anticyclonic winds to the south of the ridge, north of the monsoon trough. Recent altimeter data showed seas of 4 to 6 ft south of the ridge, except for an area of 5 to 8 ft south of the monsoon trough from 05N to 10N between 100W and 110W. This was likely due to enhance southerly winds ahead of an approaching tropical wave, as well as a component of longer period southerly swell. The high is forecast to linger through the end of the week while strengthening slightly to 1022 mb by Fri afternoon, then weakening again this weekend as a weak cold front stalls in the vicinity of 30N140W.. Little change in marine conditions is expected through this time period. $$ Lewitsky