000 AXPZ20 KNHC 260307 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 125 UTC Fri Jan 26 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 0000 UTC surface analysis and satellite imagery through 0300 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: High pressure extends across eastern Mexico. The pressure gradient between this area of high pressure and lower pressure over the eastern Pacific waters is supporting gale force winds over the Gulf of Tehuantepec. High pressure will weaken over eastern Mexico the next 24 hours. This will loosen the pressure gradient and diminish winds below gale force over the Gulf of Tehuantepec by Friday night. Winds will diminish to 25 kt on Saturday. Another cold front will move across the Gulf of Mexico Sunday into Monday. High pressure building in the wake of the front will once again help for winds to increase to gale force Sunday night. Winds may further increase to storm force Tue. Please refer to the East Pacific High Seas Forecast under AWIPS/WMO headers HSFEP2/FZPN03 KNHC for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 08N78W to 06N90W TO 06N97W. The ITCZ continues from 06N97W to 08N120W to 08N140W. Scattered moderate convection is from 07N to 09N west of 127W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Gulf of Tehuantepec: Please refer to the special features section above for more on the latest gale force gap wind event. Gulf of California: Winds will strengthen Sat to 20-25 kt as high pressure builds over the Great Basin region. A fresh set of large NW swell will propagate into the waters off the coast of Baja California Norte tonight. Seas associated with this swell will peak near 11 ft Fri night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Nocturnal winds will pulse to strong in the Gulf of Papagayo for the several nights. Elsewhere N of 09N, light to gentle offshore flow will prevail, and gentle southerly winds will dominate the area S of 09N for the next few days. REMAINDER OF THE AREA... High pressure of 1028 mb is centered north of the area near 33N136W. The pressure gradient between this area of high pressure and lower pressure in the vicinity of the ITCZ is supporting fresh to strong trades from 10N to 22N and west of 128W. NE swell continues to propagate across the forecast waters, with seas 8 ft or greater covering the area west of a line from 30N123W to 16N112W to 09N112W to 00N138W. The area of high pressure will remain north of the area through the weekend maintaining this area of fresh to strong trades. $$ AL