000 AXPZ20 KNHC 130236 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 113 UTC Sat Jul 13 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 0000 UTC surface analysis and satellite imagery through 0230 UTC. ...SPECIAL FEATURES... Tropical Depression Four-E centered near 15.8N 108.5W at 13/0300 UTC moving WNW at 11 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 30 kt with gusts to 40 kt. Numerous moderate to strong convection is noted within 30 nm W semicircle. Scattered moderate isolated strong convection is noted elsewhere from 12N to 18N between 107W and 112W. See latest NHC forecast/advisory under AWIPS/WMO headers MIATCMEP4/WTPZ24 KNHC for more details. ...TROPICAL WAVES... The axis of a tropical wave near 84W is moving westward at 15 kt. Scattered moderate and isolated strong convection is noted from 05N to 08N between 81W and 87W. The axis of a tropical wave near 97W is moving westward around 15 kt. Scattered moderate isolated strong convection is noted from 05N to 13N between 95W and 103W. The axis of a tropical wave near 136W is moving westward around 15 kt. Scattered moderate isolated strong convection is noted from 08N to 12N between 130W and 140W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 08N78W to 08N83W to 12N101W. It resumes west of TD Four-E near 12N116W to 11N130W. The ITCZ continues from 11N130W to beyond 10N140W. Scattered moderate isolated strong convection is noted from 05N to 08N between 87W and 95W. Scattered moderate convection is noted from 05N to 10N between 106W and 118W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please see above for more on TD Four-E. Elsewhere large, long period S to SW swell will impact the offshore waters south of Mexico through the weekend. A low pressure trough will strengthen over the Gulf of California this weekend, resulting in fresh SE to S winds over the northern and central Gulf Sat and Sat night with moderate winds over the southern portion. These winds will diminish Sun through Mon, then strengthen to fresh speeds again Tue and Tue night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... The monsoon trough remains near 10N, and moderate to fresh SW flow will prevail south of the trough through the weekend. Elsewhere, fresh to strong offshore winds will pulse across and downstream of the Gulf of Papagayo for the next couple of nights. Wave heights will peak around 9 ft downstream of the Gulf each morning. Large, long period SW swell propagating across the region is supporting wave heights to 10 ft south of the Galapagos Islands. Seas will build to 8 ft or greater across most of the forecast waters into Sat and persist through the weekend. Seas will subside early next week as the swell decays. REMAINDER OF THE AREA... The pressure gradient between high pressure north of 30N and the monsoon trough/ITCZ is supporting moderate to locally fresh NE winds over the waters between 11N and 24N. Seas to 8 ft prevail in the vicinity of a tropical wave with axis near 136W. These seas will continue to shift westward along with the tropical wave. Southern hemispheric swell is impacting the southern waters, with seas 8 to 9 covering much of the forecast waters S of 10N and E of 115W. Seas of 8 ft or greaters will continue propagating northward through Sat, reaching near 14N before starting to subside Sun. $$ AL