000 AXPZ20 KNHC 251608 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Fri May 25 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 1200 UTC surface analysis and satellite imagery through 1500 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends 09N76W TO 11.5N92W TO 08N116, where it transitions to ITCZ which continues west-southwest to 12.5N131W to beyond 08N140W. Scattered moderate isolated strong convection is noted from 05N to 10N between 118W AND 122W, and from 11N to 14N between 123W and 131W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Weak high pressure of 1021 mb is centered near 27N123W and extends a ridge SE to near 14N105W. The associated pressure gradient across the offshore waters of Baja California is producing fresh NW to N winds, and seas of 5-7 ft. The high will collpase by this evening, and allow a broad ridge extending from high pressure centered in the north-central Pacific near 35N150W to build east-southeastward to near the Revillagigedo Islands through Sat, and tighten the pressure gradient over the waters west of the Baja peninsula. This will support fresh to locally strong NW winds this evening through the weekend. Seas are forecast to gradually build to 6 to 9 ft offshore of Baja California tonight through Sun. Gulf of California: A fresh W to SW breeze is expected N of 29N this evening as a weak surface low tracks eastward across the northern gulf waters. Gentle to moderate NW winds will prevail across the central and southern Gulf through Sunday. with strong afternoon through evening seabreezes along the Mexican coastline from Mazatlan to Guaymas each of the next few days. Gulf of Tehuantepec: Moderate to locally fresh nocturnal drainage flow is expected through early Sat. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... A monsoon trough displaced northward into southern Mexico and Guatemala by broad low pressure over the Yucatan peninsula will support gentle to moderate southwest to west winds in the waters west of Central America through Mon, with seas expected to be generally 4 to 7 ft through the weekend. REMAINDER OF THE AREA... A weakening cold front extends 30N129W TO 28N128.5W TO 21.5N140W. The front will lose identity as it tracks slowly eastward through tonight. NW swell associated with this front will maintain 8-10 ft seas in the waters N of 29N W of 130W through this evening. Elsewhere, the broad ridge across the north central Pacific is producing a modest pressure gradient across the tradewind belt, with fresh winds generally from 10N to 20N to the west of 118W. An old and lingering low pressure center has weakened overnight and is analyzed as a along 131W-132W from 08N to 15N. Tradewinds in this vicinity area as high as 25 kt. The trough will slowly dissipate during the next 36 hours as it shifts westward. Meanwhile the associated high will shift E into the NE Pacific, and maintain fresh tradewinds and seas 7-9 ft across the tradewind belt through the weekend. $$ Stripling