000 AXPZ20 KNHC 260319 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Wed Jun 26 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 One-E centered near 15.6N 106.8W at 26/0300 UTC moving WNW at 13 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 30 kt with gusts to 40 kt. T.D. One-E is expected to become a minimal tropical storm as it moves WNW of the coast of Mexico, then diminish thereafter as it continues to the Revillagigedo Islands. Scattered moderate to strong convection is evident within 60 nm of the center. See latest NHC forecast/advisory under AWIPS/WMO headers MIATCMEP1/WTPZ21 KNHC for more details. ...TROPICAL WAVES... A tropical wave entering the eastern Pacific from the Caribbean has an axis extending N from 05N85W into Costa Rica, moving W around 20 kt. Scattered moderate convection is seen within 90 nm of 11N88W. A tropical wave has an axis along 115W from 03N to 11N and is moving W at 20 kt. Minimal convection is evident where the tropical wave intersects the monsoon trough. A tropical wave has an axis along 126W from 03N to 13N, moving westward around 15 kt. Despite being in an area of deep layer moisture, no significant convection is evident near the wave. Scattered convection is west of the tropical wave along the monsoon trough. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 10N85W to 09N97W to 14N103W then resumes SW of T.D. One-E near 10N110W to 08N117W to 09N123W. The ITCZ is from 11N127W to beyond 10N140W. Scattered moderate convection is noted within 90 nm of the ITCZ axis between 128W and 139W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... See the Special Features section above for details regarding TD One-E. A ridge axis extends southeast from high pressure centered NW of the area near 34N140W to near the Revillagigedo Islands. The pressure gradient on the east side of this ridge is supporting moderate NW winds over offshore waters west of Baja California Sur. Earlier altimeter data revealed waveheights in the range of 4 to 6 ft for the offshore waters of Mexico. Aside from the impact of TD One-E in the waters of southern Mexico, strong gap winds are possible in the Gulf of Tehuantepec Wed night through Sat night, possibly peaking at minimal gale force Thu night and Fri. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gentle to moderate winds will continue for most areas, although pulses of fresh to strong NE to E gap winds will impact the Papagayo region through Sat. A plume of gap winds could extend W from the Gulf of Papagayo to 100W by Fri evening. Seas within the plume are expected to range between 8 and 10 ft. Combined seas are mainly comprised of long period S-SW swell originating in the southern hemisphere. Recent altimeter satellite passes indicated wave heights ranging between 5 and 7 ft adjacent to Central America and along the coasts of Colombia and Ecuador. The long period swell will maintain combined seas near these heights in these areas for several more days. REMAINDER OF THE AREA... South of the high nar 34N140W, the pressure gradient between the ridge and lower pressure over the tropics is generating moderate northeast to east trades north of the ITCZ to about 20N and west of about 120W. Little change in the position of the high or the strength of trades is expected for several days. Wave heights in this area will generally run between 5 and 7 ft. Farther south, long-period cross-equatorial swell is maintaining wave heights around 8 ft south of 02N and west of 113W. As the swell energy continues to decay, the area of 8 ft seas will gradually shrink in coverage through Thu. A new round of cross- equatorial swell will cause seas south of 05N between 105W and 125W to build to between 7 and 9 ft by Sun evening. $$ Mundell