000 AXPZ20 KNHC 052143 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2143 UTC Thu Apr 5 2018 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 2030 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends west-southwestward from 09N82W to 04N101W. The ITCZ continues westward from there to 04N120W to beyond 04N140W. Scattered moderate convection is from 04N to 08N W of 130W and from 03N to 08N between 81W and 95W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A weak ridge extends SE across the offshore forecast waters into the Revillagigedo Islands, maintaining mainly gentle to moderate NW winds and seas of 4-6 ft to the S of Cabo San Lazaro, with moderate to locally fresh NW-N winds and 5-7 ft seas in the waters N of Cabo San Lazaro. A SW-NE oriented ridge axis will build W of Baja California Norte Fri and Fri night, which will cause winds to increase to fresh to locally strong Fri night through Sun N of 28N with seas increasing to 8 to 10 ft. Farther south, a weak pressure pattern will transition to a typical trade wind regime, with gentle to moderate NW to W winds and seas of 4-6 ft prevailing by Fri as high pressure builds north of the region. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Moderate NE to E winds in Papagayo will freshen Fri morning as high pressure builds north of the region, with seas increasing to 4-6 ft. Gentle to moderate winds will prevail elsewhere through Tue night. Fresh to strong Gulf of Tehuantepec gap winds may occur by Wed as a cold front crosses the western Gulf of Mexico. REMAINDER OF THE AREA... A broad ridge dominates the waters north of 15N and W of 110W associated with 1023 mb high pressure located near 28N128W. The high is expected to remain nearly stationary during the next 24 hours and then weaken through Sat. The gradient between this ridge and lower pressures in the vicinity of the ITCZ will produce moderate to locally fresh trade winds and seas to 7 ft across the waters from 08N to 15N W of 125W today through Sat. A strong low pressure system moving N of the area will drag a cold front across the NW portion of the discussion area Fri night and Sat. The front will extend from 30N134W to 26N140W Fri night, from 30N126W to 25N140W on Sat, then dissipate from 32N119W to 25N140W by Sat night. Fresh to strong return flow is expected N of 27N W of 134W ahead of the front today through Fri, with seas building to 8 to 10 ft. Winds will decrease as the front weakens. However, a NW swell to 8 ft will linger N of 28N and W of 135W through the weekend. Another cold front will reach the NW waters near 30N140W Mon night, accompanied by a new set of large NW swell. $$ Latto