000 AXPZ20 KNHC 270901 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 720 UTC Sun May 27 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 0600 UTC surface analysis and satellite imagery through 0845 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 14N91W to 10N100W to 07N125W to 08N134W. Scattered moderate and isolated strong convection is noted from 06N to 12N between 84W and 96W, from 06N to 10N between 96W and 113W and within 60 nm either side of a line from 06N116W to 10N132W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A ridge extends SE into the region from a 1030 mb high centered near 35N138W to the Revillagigedo Islands. Fresh to locally strong NW to N winds will continue across the offshore waters of Baja California today, then become fresh tonight through Tue. Seas of 6 to 9 ft will prevail across this area through the weekend then diminish gradually Mon and Tue. Gulf of California: Gentle to moderate NW winds are expected across the Gulf waters today, with strong afternoon and evening sea breezes recurring along the Mexican coastline from Mazatlan to Guaymas through Mon. A low pressure trough developing over the Baja Peninsula will cause winds over the Gulf to light to gentle by Wed. Gulf of Tehuantepec: Winds are expected to be variable during the next few days, with moderate NW to N winds at night and light SW to S winds during the late mornings and afternoons. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... The monsoon trough is displaced well N of its climatological position in response to broad low pressure that has formed over the Yucatan peninsula and Central America. The trough now extends WSW from the Guatemala coastal waters. This pressure pattern will persist across the regional Pacific waters through at least Wed and support light to moderate SW to W winds and 4 to 6 ft seas for the waters west of Central America. REMAINDER OF THE AREA... Elsewhere, the ridge building over the north central Pacific is producing a modest pressure gradient across the trade wind belt, with moderate to fresh winds observed in satellite-derived wind data from 10N to 25N to the west of 120W. A 1010 mb low pressure center is drifting WSW across far SW portions of the discussion area near 09N137W. A broad area of fresh to strong NE winds and seas 8 to 9 ft is evident near the low from 11N to 18N between 129W and 139W. The low will weaken to a trough today as it translates westward. Meanwhile the expansive high centered over the central Pacific will slowly strengthen and shift E over the NE Pacific as it maintains fresh trade winds and seas from 7 to 9 ft across the trade wind belt through Tue night. Deepening low pressure over the Desert SW will combine with building high pressure W of California to tighten the pressure gradient along the California coast. Long period N swell generated by these winds will cause seas N of 25N between 120W and 135W to build to between 8 and 10 ft by Wed morning. $$ CAM