000 AXPZ20 KNHC 062149 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2149 UTC Fri Apr 6 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 2130 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 08N81W to 04N95W. The intertropical convergence zone continues from 04N95W to 07N120W to beyond 03N140W. Scattered moderate convection is ongoing within 90 nm either side of the surface trough between 82W and 95W. Scattered moderate convection is also noted within 90 nm north of the ITCZ west of 118W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... 1021 mb high pressure centered east of the area near 25N125W is maintaining gentle NW winds with 4 to 6 ft in NW swell across the region currently. A weak upper disturbance is supporting a few thunderstorms south of the Gulf of Tehuantepec. The high pressure will dissipate ahead of a cold front moving eastward into the waters off Baja California late Sat. Another area of high pressure building behind the cold front will support fresh to strong NW winds off Baja California Norte this weekend, with seas building to near 10 ft by Sun night. Winds and seas will then decrease Mon and Tue. Elsewhere over the open Pacific waters, light to gentle winds and seas of 4-6 ft will prevail. Looking ahead, fresh to strong gap winds are possible through the Gulf of Tehuantepec Wed, possibly reaching near gale Wed night, related to a cold front moving into southern Mexico. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Light to gentle winds are expected through the forecast period. Seas in the 2-4 ft range will prevail, except for the far southern zones where southerly swell will build seas to 4-6 ft this weekend. REMAINDER OF THE AREA... A cold front is passing southwest of 30N140W and entering the forecast waters today, accompanied by fresh to strong SW winds and seas to 8 ft north of 28N and west of 135W. Winds will diminish tonight as the front drifts eastward and weakens. Associated NW swell will decay below 8 ft through 48 hours. Elsewhere 1021 mb high pressure centered near 25N125W will continue to support mainly light to gentle winds north of 15N and moderate to occasionally fresh trades farther south. Looking ahead, a second cold front will move into the waters north of 25N early next week, accompanied by larger NW swell, with seas peaking 10 to 15 ft over the waters north of 25N and west of 130W waters Tue. NW swell of 8 to 11 ft will cover the region north of 15N and west of 130W through mid week. $$ Christensen