000 AXPZ20 KNHC 091001 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Tue Nov 9 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 Depression Sandra is centered near 14.8N 119.7W at 0900 UTC moving W at 12 kt. Estimated minimum central pressure is 1009 mb. Maximum sustained wind speed is 25 kt with gusts to 35 kt. Peak seas are to 11 ft. strong vertical wind shear is taking its toll on Sandra and displacing the convection to the E of center. Widely scattered moderate isolated convection is noted from 10N TO 20N between 114W AND 119W.. Sandra will continue moving westward, while the wind shear is expected to weaken the system to a remnant low by this afternoon. 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. Tropical Depression Terry is centered near 11.1N 110.4W at 0300 UTC moving W at 12 kt. Estimated minimum central pressure is 1007 mb. Maximum sustained wind speed remains 30 kt with gusts to 40 kt. Peak wave heights were measured overnight by satellite altimeter at 11 ft. Numerous moderate to strong convection is occurring within 45 nm SE and 150 nm NW of center. Terry is expected to continue on a WNW to W track, and slowly weaken to a remnant low by Thu. 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. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 10N74W to 09N87W to 08N99W, then resumes from near 11N123W to 09.5N130W. The ITCZ continues from 09.5N130W to beyond 08N140W. Scattered moderate to strong convection is noted N OF 02N E of 83W, and from 08.5N to 12N W of 128W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO Satellite derived winds observed northerly gap winds around 30 kt tonight across the Gulf of Tehuantepec, and will persist through morning before diminishing slightly. Elsewhere, a weak surface ridge extends SE to the W of Baja California Sur. The 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 6-8 ft range in mixed swell, except for 1-3 ft in the Gulf of California. Strong winds will prevail across the Gulf of Tehuantepec through early Wed, and will briefly increase to just below gale force Tue night. High pressure W of the area will strengthen across the region tonight through Thu, to produce fresh Tue night through early Thu, except for strong winds gradually spreading S to offshore of Cabo San Lazaro through Wed evening. Moderate N winds inside the Gulf of California Tue night will become fresh Wed afternoon through Thu afternoon. Strong gap winds will return to Tehuantepec Fri through Sat. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR A cold front has moved into the SW Caribbean along the coast of Nicaragua, with high pressure behind it forcing strong gap winds across the Papagayo region, and fresh gap winds across the Gulf of Fonseca. Elsewhere light to gentle winds NE are N of the monsoon trough and gentle to moderate SW to S winds prevail S of the monsoon trough. Seas of 5-6 ft prevail in SW swell across the discussion waters. Fresh to strong gap winds will continue over the Gulf of Papagayo through midday Wed before diminishing through the remainder of the week. Gentle to moderate S to SW winds will persist south of the monsoon through the forecast period. REMAINDER OF THE AREA... Please see special features section above for more on T.D. Terry and T.D. Sandra. The pressure gradient between 1023 mb high pressure near 28N124W 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 21N and W of 115W, with gentle to moderate winds N of 21N. Gentle to moderate winds prevail south of the monsoon trough and ITCZ. Seas are in the 7-9 ft range in mixed NW and NE swell over the waters north of 10N and west 115W. Seas in the 6-8 ft range prevail elsewhere. A cold front will brush the far NW waters overnight and Tue, with moderate to fresh SW to W winds and seas to 8 ft across the far NW waters W of 158W. High pressure will then settle across the northern waters through mid week to maintain a zone of fresh trade winds S of 20N throughout most of the week. The remnants of Sandra will move westward through the trade wind zone to produce a broad area of strong trades and seas to around 10 ft. $$ Stripling