000 AXPZ20 KNHC 080958 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Mon Nov 8 2021 Tropical Weather Discussion for the eastern Pacific Ocean from 03.4S to 30N, east of 120W including the Gulf of California, and from the Equator to 30N, between 120W and 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... Tropical Storm Terry is centered near 9.6N 105.1W at 0900 UTC moving WNW at 12 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 35 kt with gusts to 45 kt. Peak wave heights are estimated at 12 ft within 90 nm NE quadrant of the center. Scattered moderate to strong convection is from 08N TO 11.5N between 99W AND 108W. Environmental conditions are expected to become unfavorable for additional strengthening, and Terry is expected to weaken to a tropical depression later today as it continues on a WNW track. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/MIATCPEP3.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMEP3.shtml for more details. Tropical Storm Sandra is centered near 14.1N 116.3W at 0900 UTC moving WNW at 6 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 35 kt with gusts to 45 kt. Peak seas are up to 12 ft. Scattered to locally numerous moderate to strong convection is within 240 nm across the NE semicircle. Gradual weakening is expected to begin today as strong vertical wind shear impacts Sandra. Sandra is expected to become a tropical depression today remnant low by Tuesday evening. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/MIATCPEP4.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMEP4.shtml for more details. Gulf of Tehuantepec Gale Warning: The pressure gradient between high pressure across the western Gulf of Mexico and Tropical Storm Terry SW of Tehuantepec is supporting gale force gap winds over the Gulf of Tehuantepec. This gale force gap wind event is expected to last through this morning, with peak winds of around 35 kt and seas forecast to reach a maximum of around 12 ft. Winds are expected to diminish just below gale force today and persist through Tue evening before gradually diminishing through Thu. Please read the latest NWS High Seas Forecast issued by the National Hurricane Center at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for further details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10N75W to 09N100W then resumes near 12.5N118W to low pres 1011 mb near 10.5N124W to 10N130W. The ITCZ continues from 10N130W to beyond 08N140W. Aside from the convection associated with the tropical cyclones in the special features section above, scattered moderate to strong convection is noted N OF 02.5N E OF 81.5W, from 05.5N to 08.5N between 89W and 96W, and from 09N to 11N between 118W and 123W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO Please see the Special Features section above for details on the latest Gulf of Tehuantepec gale force gap wind event as well as information on T.S Terry and T.S. Sandra. Elsewhere, a weak surface ridge extends SE to the W of Baja California Sur to near 26N120W. A weak pressure gradient across the region is supporting light to gentle northerly winds across the waters west of the Baja California peninsula, inside the Gulf of California and across the SW Mexico offshore waters. Seas are in the 6-9 ft range in mixed swell, except for 1-3 ft in the Gulf of California. Gale conditions will prevail in the Gulf of Tehuantepec through this morning, and may briefly reach near gale force tonight. Gentle to moderate northerly winds will persist across the offshore waters of Baja through tonight then become moderate to fresh Tue through Wed. Light to gentle winds will continue across the Gulf of California through Tue night before freshening late Wed through Thu. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR Light to gentle winds are N of the monsoon trough while gentle to moderate SW to W winds prevail S of the monsoon trough. Seas of 5-6 ft prevail in SW swell across the discussion waters. Offshore gap winds will pulse from fresh to strong over the Gulf of Papagayo each night for the next several days. Gentle to moderate SW winds will persist S of the monsoon trough. REMAINDER OF THE AREA... Please see special features section above for more on T.S Terry and T.S. Sandra. The pressure gradient between high pressure across the northern waters and lower pressure within the monsoon trough and in the vicinity of the ITCZ is supporting moderate to fresh NE to E winds N of the ITCZ and monsoon trough to near 22N and W of 120W, with gentle to moderate winds N of 24N. Gentle to moderate winds prevail south of the monsoon trough and ITCZ. Seas are in the 7-9 ft range in mixed NW and S swell over the waters north of 10N and west 115W. Seas in the 6-8 ft range prevail elsewhere. The NW swell will gradually decay through today. A cold front will brush the far NW waters today, preceded by fresh SW to W winds and seas to near 9 ft across the far NW waters W of 128W. High pressure will then settle across the northern waters through mid week. $$ Stripling