000 AXPZ20 KNHC 312139 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2139 UTC Fri Mar 31 2017 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 2100 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The intertropical convergence zone axis extends from 08N119W to 04N130W to 02N140W. Scattered moderate and isolated strong convection is from 05N to 09N between 123W and 136W, and also from 07N to 14N west of 133W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... High pressure of 1032 mb centered north of the area near 36N136W ridges southeast to the Revillagigedo Islands. A cold front is heading SE across the central Gulf of California. The most recent satellite-derived wind data indicate moderate to fresh NW winds W of Baja California Norte and gentle to moderate NW winds west of Baja California Sur. Winds in the Gulf of California have diminished to moderate to fresh as the cold front is weakening. Gentle to moderate winds continue over the southern Gulf of California. Light to gentle winds and seas in the 4-7 ft range are noted elsewhere across the forecast waters. Gale force winds north of the area off the central California coast are generating large NW swell. Seas are currently peaking near 13 ft over the waters W of Baja California Norte near 30N118W. The swell will subside and seas will decrease to around 8 ft over this area on Sunday. Another round of NW swell will cause seas to rebuild to between 10 and 12 ft over this area on Monday. Seas off Baja California Sur will remain between 7 and 9 ft through the middle of next week. Light to gentle winds will prevail elsewhere through the forecast period. Yet another cold front stalling near 30N140W will usher in more NW swell by the end of next week. This event appears to be more subdued with seas W of Baja California Norte building to between 8 and 9 ft. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Light to gentle winds and seas in the 3-6 ft range will prevail over the forecast waters through the middle of next week. Looking ahead, a strong cold front with surging high pressure behind it is forecast to move through the Gulf of Mexico by the end of next week. This is likely to induce near gale to gale force winds in the Gulf of Tehuantepec area Thursday night into next Friday. REMAINDER OF THE AREA... High pressure continues to reside over the northern waters. The pressure gradient between the area of high pressure and the ITCZ is generating moderate to fresh trade winds north of 05N and west of 125W. Seas within this area range between 8 and 11 ft as long period northwest swell mix with shorter period northeast wind waves. The areal coverage of the strong trades will gradually diminish during the next couple of days as high pressure weakens slightly and the pressure gradient relaxes. Another round of large NW swell will reach the NW part of the forecast area Saturday night, propagating eastward through early next week. Seas associated with this swell event will peak near 13 ft over the northern waters Sunday before subsiding. A front stalling near 30N140W will introduce more NW swell on Wednesday night. Seas near 30N140W will peak near 13 ft at this time. This event appears to be more subdued compared to the current event as the swell will rapidly decay as they propagate SE. $$ LEWITSKY