000 AXPZ20 KNHC 260323 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 322 UTC Mon Nov 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 FEATURE... High pressure building S along the east slopes of the Sierra Madre Occidental in Mexico on Mon will support a gap wind event over the Gulf of Tehuantepec beginning late Mon afternoon. The winds will rapidly increase to minimal gale force right after the onset of this event with seas building to 14 ft by Tue morning. Winds and seas will then gradually diminish Tue evening through Wed. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N82W to 08N90W to low pressure 1008 mb centered near 08N103W to low pressure 1008 mb centered near 08N119W to 06N121W. The ITCZ continues from 06N121W to beyond 08N140W. Scattered moderate convection is present from 06N to 12N between 100W and 120W. Isolated moderate convection is from 06N to 09N between 86W and 100W and from 05N to 10N between 120W and 140W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Seas of 8 ft in NW swell N of 27N will subside below 8 ft through early tonight. A cold front will approach 30N140W by Tue night. Large long period NW swell will propagate well ahead of the front and reach the waters W of Baja California Norte by Tue morning and the southern tip of Baja California Sur by Wed morning, with seas of 8 to 12 feet in NW swell expected west of Baja through Fri. Elsewhere, low pres centered near 08N103W may lift out of the monsoon trough during the next couple of days and slowly drift NNW, eventually entering the waters S of Acapulco, Mexico near 14N104W by Wed night. This system may gradually develop as it tracks NNW, possibly producing fresh to strong winds and seas to 10 ft by Thu morning. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Enhanced infrared imagery from GOES-E continues to show intermittent plumes of volcanic ash originating from the Fuego volcano in southern Guatemala. The plumes track WNW and become diffuse as they cross into SW Mexico and near the coast of Chiapas. The volume of ash within these plumes remains light and does not warrant an ashfall advisory at this time. Gulf of Papagayo: Moderate to fresh NE winds will pulse over the area each night through this week. Elsewhere, the monsoon trough will meander between 05N and 10N during the next several days with gentle to moderate NE winds prevailing N of the trough, and gentle to moderate SW winds continuing S of the trough. Seas will hover between 4 to 6 ft in cross equatorial SW swell through Tue, then increase to between 5 and 8 ft S of 10N by midweek. REMAINDER OF THE AREA... The pressure gradient between 1022 mb high pressure centered near 30N134W and low pressure associated with the monsoon trough supports an area of fresh to strong NE winds over the waters from 09N to 15N west of 125W. Latest altimeter data continues to show seas of 8 to 11 ft in this region, with seas 8 ft or greater extending as far N as 20N and as far S as 07N. These seas coincide under a larger area of moderate to fresh winds that stretches from 07N to 22N W of 118W. Low pres centered near 08N119W is generating fresh winds in the NW semicircle of the low, with seas to 9 ft within 210 nm of the low center. The low will move W during the next couple of days. Large long period NW swell associated with a strong cold front over the north central Pacific will push SE from 30N140W early on Mon, then seas will rapidly build to between 14 and 17 ft in the far NW waters by Mon night. This robust event will cause seas to build to 8 ft or higher for most of the waters W of 110W by Thu morning. $$ Latto