000 AXPZ20 KNHC 061556 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Wed Sep 6 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 1500 UTC. INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N84W to 14N100W to 15N116W to a 1010 mb low near 13N130W to 09N138W. The ITCZ continues from 09N138W to beyond 09N140W. Numerous moderate to strong convection is from 04N to 08N E of 83W. Scattered moderate convection is from 05N to 10N between 87W and 98W, from 07N to 12N between 110W and 118W, from 14N to 18N between 111W and 120W and from 06N to 09N W of 132W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A weak surface ridge with 1019 mb high center near 26N137W covers the NW forecast area and extends E to Baja California adjacent waters where an elongated area of low pressure prevails extending to the Gulf of Califiornia. The pressure gradient between these two features currently supports moderate NW winds W of the Baja California Peninsula. The pressure will slightly increase tonight, resulting in a tighter gradient, thus fresh to locally strong NW winds and 6 ft seas N of 27N through early Thu. Moderate NW winds will then continue through Fri morning. Gulf of California...Light southerly winds are expected across the Gulf of California through early Fri, then increasing to a moderate breeze through the weekend. Gulf of Tehuantepec: A gap wind event with fresh to strong winds and seas to 8 ft is forecast from Sat night through Sun morning. Winds will pulse again at night on Sun. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Light and variable flow is expected N of the monsoon trough Sat night, then the pressure gradient will tighten with fresh monsoonal flow from the equator to along 09N, with seas building from 6 to 8 ft. REMAINDER OF THE AREA... A weak surface ridge with 1019 mb high center near 26N137W covers the NW forecast area and extends S to near 15N. The gradient between the high and lower pressure associated with the monsoon trough will maintain gentle to moderate trades N of the monsoon trough W of 120W, with seas of 4 to 8 ft through Fri. Fresh monsoonal flow will develop Fri morning N of the Equator to along 10N east of 125W, with seas building to 8 ft through Sat night. $$ Ramos