000 AXPZ20 KNHC 291452 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1452 UTC Wed Mar 29 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 1200 UTC surface analysis and satellite imagery through 1445 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough axis extends from 07N82W to 06N92W to 02N102W. The intertropical convergence zone axis extends from 02N102W to 02N116W to 02N130W. Scattered moderate convection is within 30 nm either side of the trough between 82W and 96W. Scattered moderate and isolated strong convection is from 04N to 06N between 100W and 102W, from 04N to 06N between 123W and 130W, and also from 02N to 04N between 137W and 139W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... High pressure north of the area extends a ridge southeast to near the Revillagigedo Islands. The pressure gradient between the ridge and lower pressure inland over Mexico is supporting fresh to strong N-NW winds west of Baja California Norte. Long period NW swell continues to propagate across the offshore waters west of Baja California building seas to 10-13 ft. The high pressure will remain nearly stationary over the next 24 to 48 hours, then shift westward Thursday night and Friday. Additional pulses of NW swell will build combined seas to 11-12 ft across offshore zones PMZ009 and PMZ011. A cold front will drop south and extend to near or over the far northern Gulf of California tomorrow evening and night, tightening the local pressure gradient. Southwest winds just ahead of this front in the northern Gulf will increase to fresh to strong at that time, with fresh to strong northerly winds behind it by Friday afternoon, then diminishing later Friday as the pressure gradient weakens. Light to gentle winds will prevail elsewhere through the rest of the week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gap wind events are not expected to be very significant the next few several across the Central American coastal and offshore waters. Light to gentle winds and 3-5 ft seas are expected to prevail over the forecast waters the next several days. REMAINDER OF THE AREA... Strong 1030 mb high pressure located north of area near 33N135W dominates the northern half of the forecast area. The pressure gradient between the high and lower pressure near the equator is supporting fresh to strong trades from roughly 12N to 17N west of 135W. Seas in this area are 8-11 ft, in a mix of long period NW swell and NE wind waves. The aerial extent of the trades will diminish through Thursday as the high moves west and weakens slightly. Marine conditions over the forecast region will change little during the next few days under the influence of this broad ridge. Looking ahead, high pressure will strengthen late in the upcoming weekend with a belt of fresh to strong northeast winds developing around it across the northwest and north central waters Sunday. $$ LEWITSKY