000 AXPZ20 KNHC 160151 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 123 UTC Tue May 16 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 0000 UTC surface analysis and satellite imagery through 0300 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N80W to 15N89W to 14N98W to 07N103W to 06N110W. The ITCZ continues from 06N110W to 06N130W to beyond 05N140W. Scattered moderate and isolated strong convection is noted from 11N to 13N between 100W and 103W. Scattered moderate convection is found from 05N to 07N between 136W and 140W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A tight pressure gradient between strong 1035 mb high pressure centered W of California near 36N145W and a low pressure trough over interior Mexico is generating fresh to strong winds over the Gulf of California N of 29N. Seas in this area range between 4 and 6 ft. Gentle to moderate winds prevail over the remainder of the Gulf along with 1-3 ft seas. Moderate to fresh NW winds and seas to 8 ft are occurring off the coast of Baja California Norte north of 29N as NW swell generated by strong to gale force winds that were blowing earlier along the California coast propagate SE into the forecast waters. The remaining forecast waters are experiencing gentle to moderate N to NW winds and seas in the 4-7 ft range. Winds over the far northern Gulf of California will pulse to near gale force tonight, then subside by Tuesday afternoon. Seas are expected to peak tonight around 7 ft. Seas will subside below 8 ft off the coast of Baja California Norte by Tuesday night. A fresh round of NW swell will propagate into these waters Wednesday night through Thursday night. Seas N of 27N are expected to build once again to above 8 ft. Winds along the Pacific Coast of Baja N of 29N could become strong Wednesday night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Light to gentle winds will continue through Friday night. Seas in the 3-5 ft range currently prevail. Long period SW swell from the Southern Hemisphere will arrive in the forecast waters of Ecuador and Colombia Wednesday morning through the end of the week, causing seas to build into the 5-8 ft range. REMAINDER OF THE AREA... High pressure measuring 1035 mb is centered NW of the forecast area near 36N145W. A ridge extends SE from the high to near the Revillagigedo Islands at 15N106W. Moderate to fresh trades prevail between the ridge and ITCZ to the west of 120W. Seas in the trade-wind belt generally range from 6 to 8 ft. W of 137W between 25N and 28N NE and NW swell will mix to bring combined seas to just above 8 ft. W of 137W from 07N to 25N NE swell will mix with NE wind waves to cause combined seas to rise to just above 8 ft. Tuesday night through Wednesday night SW swell from the Southern Hemisphere will be added to the existing mix of swell and cause seas to build to between 8 and 9 ft from 06N to 09N between 121W and 129W. Elsewhere, seas will remain in the 6 to 8 ft range through Thursday in moderate to occasionally fresh trade-wind flow. $$ cam