000 AXPZ20 KNHC 031022 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Sun Nov 3 2019 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 0900 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: Strong high pressure persists across the Gulf of Mexico and extending southward across eastern Mexico tonight. This is forcing persistent northerly gales across the Gulf of Tehuantepec, with peak downstream seas currently near 12 ft. The gales have gradually diminished to around 35 kt tonight, per recent scatterometer data, and are expected to continue through early Sun evening before falling just below below gale force Sun night and then to around 30 kt Mon morning. Strong northerly gap winds are then expected to continue across Tehuantepec throughout the week, and will pulse at night to near 30 kt. Please read the latest High Seas Forecast issued by the National Hurricane Center under AWIPS/WMO headers FZPN03 KNHC/HSFEP2 or at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for further details on the Gale Warning. ...TROPICAL WAVES... A tropical wave along 83W N of 03N, moving west at 10 kt. Scattered moderate to strong convection is from 05.5N to 12N between 79W and 84W. A tropical wave is along 101W from 05N to 15N, moving west at 10 kt. This wave interacting with gap winds downstream of the Gulf of Tehuantepec, and is forcing scattered moderate to strong convection from 09.5N to 15N between 100W and 106W. A tropical wave extends along 110W-111W from 03N to 18N, moving west at 10 to 15 kt. Scattered moderate to strong convection is from 07N to 15N between 107W and 116W. A tropical wave is located along 123W-124W from 04N to 18N, moving west at 10 kt. No significant convection is associated with this wave. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09.5N74.5W TO 09N87W TO 10.5N97W TO 08.5N111W. The ITCZ extends from 08N112W TO 07N127W TO 10N140W. Convection along these axis is described above with the tropical waves. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Gulf of Tehuantepec: See the Special Features section for details on a Gale Warning. Gulf of California: Moderate high pressure over the Great Basin well north of the region is supporting moderate NW to N winds through most of the Gulf of California, with seas of 2-4 ft. The high pressure is weakening and will shift eastward today, and allow for winds to diminish across the Gulf today through the next several days. For the remainder of the area, a weak high pressure ridge extending SE into the region is generally producing gentle to moderate winds across the regional waters, with slight to moderate seas of less than 6 ft in mainly NW swell over open waters. Except for locally moderate NE winds near Baja California Sur, these conditions are expected to continue through early next week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Weak high pressure dominates the region, with a modest pressure gradient expected to keep gentle to moderate offshore winds N to 10N, and slight to moderate seas into early next week. Offshore winds around 15 kt prevail across the Papagayo region and will pulse to around 20 kt each of the next few nights. Farther south, gentle to moderate S- SW monsoonal flow, occasionally pulsing to moderate to fresh, will continue across the offshore forecast waters of Costa Rica, Panama, Colombia and Ecuador through the upcoming weekend. Seas will build west of 92W off Guatemala through tonight due to the northerly swell being generated from the gale force gap winds across the Gulf of Tehuantepec. REMAINDER OF THE AREA... High pressure north of the area will maintain a modest pressure gradient north of the tropics and produce moderate to fresh tradewinds from 08N-24N W of 120W for the next several days. Slight to moderate seas are expected across the regional waters as no significant swell events are expected through Mon. $$ Stripling