000 AXPZ20 KNHC 252203 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 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 1800 UTC surface analysis and satellite imagery through 2100 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 14N91W TO 10N100W TO 10N104W, then transitions to ITCZ which continues west-southwest to 10N110W TO 07.5N123W TO low pres near 12N131.5W 1013 MB then resume from 10N134W TO beyond 08.5N140W. Scattered moderate to strong convection is noted from 06N to 11.5N between 80W and 99W, and within 300 nm NE quadrant of low at 12N131.5W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Weak high pressure centered near 27N123W this morning has collapsed and is becoming absorbed in a stronger ridge building SE into the region from a 1033 mb high near 35N150W to the Revillagigedo Islands. Fresh NW to N winds across the offshore waters of Baja California will increase modestly tonight through late Sat, and then persist through Sun. Seas across this area are currently running 5-7 ft and are expected to gradually build to 6 to 9 ft 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... The monsoon trough has lifted northward of its typical position in response to broad low pressure that has developed over the Yucatan peninsula and Central America. This scenario 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 has become ill defined from near 30N129W TO 28N128.5W TO 21.5N140W. NW swell associated with this front will maintain 8-9 ft seas in the waters N of 29N W of 130W through Sat morning. Elsewhere, the building 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. A low pressure center was captured by an afternoon scatterometer pass near 12N131.5W, and showed a broad area of 20 to 25 kt NE winds within 150 nm across the NW quadrant. The low will weaken to a trough by late Sat 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