000 AXPZ20 KNHC 061604 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1604 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 1200 UTC surface analysis and satellite imagery through 1530 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 08N78W to 06N100W. The intertropical convergence zone continues from 06N100W to 07N120W to beyond 03N140W. Scattered moderate convection is ongoing within 90 nm either side of the surface trough between 81W and 93W. Scattered moderate convection is also noted within 120 nm north of the ITCZ between 115W and 140W. Farther south, a second intertropical convergence zone is analyzed from 05S82W to 02S100W to 06S120W. No significant convection is noted. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... 1021 mb high pressure centered east of the area near 26N129W is maintaining gentle NW winds and 4 to 6 ft seas 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 into the waters off Baja California late Sat. 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. 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... 1021 mb high pressure centered near 26N129W will continue to support mainly light to gentle winds north of 15N and moderate to occasionally fresh trades farther south. A cold front will pass southwest of 30N140W and enter the forecast waters today, accompanied by fresh to strong SW winds and seas to 8 ft. Winds will diminish tonight as the front drifts eastward and weakens. Associated NW swell will decay below 8 ft through 48 hours. 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. $$ Christensen