000 AXPZ20 KNHC 020725 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Wed Mar 2 2022 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 0720 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends near the coast of Colombia from 06N77W to 05N80W to 06N87W to 04N107W. The ITCZ extends from 02N108W to 09N127W to 07N140W. Scattered moderate convection is noted from 09N to 11N between 116W and 120W, and from 14N to 18N between 121W and 125W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO An earlier ASCAT scatterometer pass indicated strong N winds in the Gulf of Tehuantepec which have likely increased to strong to near gale-force in the hours since. Seas are likely 8 to 10 ft with these winds. Fresh N-NE swell generated earlier by this prolonged gap wind event has also propagated to near 10N99W with seas up to around 8 ft. A ridge of high pressure extends across the remainder of the offshore waters of Mexico from northwest to southeast. Gentle to locally moderate winds are under the ridging, along with seas of 5 to 7 ft in NW swell. Seas are 3 ft or less in the Gulf of California, highest near the entrance. For the forecast, strong to near gale force northerly winds will continue through Thu night in the Gulf of Tehuantepec, followed by fresh to strong N winds Fri through Fri night, diminishing to gentle by Sat afternoon. Elsewhere, mainly gentle winds will prevail through Thu morning. A new set of NW swell will build seas slightly west of Baja California, up to 8 ft from Punta Eugenia northward, tonight. Fresh to locally strong NW-N winds will develop west of Baja California by Fri and persist through the weekend behind a dying cold front. NW swell will come with this cold front, with seas building to 10 to 14 ft west of Baja California Norte by late Fri. Seas of 8 to 10 ft will build southward, off Baja California Sur on Sat. Fresh to strong SW winds are expected in the northern Gulf of California ahead of the front Thu night through Fri night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR Fresh to strong NE winds are across the Gulf of Papagayo region along with 5 to 7 ft seas offshore. Fresh to strong N winds have in the Gulf of Panama are diminishing. Seas of 4 to 6 ft are in the Gulf of Panama. Mainly light to gentle winds are noted elsewhere, along with seas of 3 to 6 ft. For the forecast, fresh to strong NE winds will continue to pulse each night across the Papagayo region through at least Fri night. Winds in the Gulf of Panama will pulse to moderate, mainly at night. Gentle winds will prevail elsewhere. Seas will build slightly offshore of Ecuador to the Galapagos Islands through the end of the week due to a SW swell. REMAINDER OF THE AREA High pressure of 1022 mb is located near 27N132W. A ridge axis extends from the high southeastward to near the Revillagigedo Islands. Light to gentle anticyclonic winds are found under this ridge north of 20N and east of 132W, along with 6 to 7 ft seas in old NW swell. A cold front has breached 30N140W, extending from 30N137W to 28N140W. Moderate to fresh N-NE winds are currently behind the front. A set of NW swell associated with this frontal system has propagated well southeast of the parent front with seas of 7 to 11 ft north of 20N and west of 128W. A surface trough is near the ITCZ to the south of the ridge, from 17.5N123W to 10N122.5W. Moderate to locally fresh trades are north of the ITCZ to 20N and west of 120W due to the pressure gradient between the ridge and trough, with gentle to moderate winds elsewhere across the open waters. Seas are 7 to 8 ft in old NW swell and mixed NE wind waves south of 20N and west of 117W, with 6 to 7 ft across the remainder of the open waters. For the forecast, high pressure will remain in control over the northern part of the region to the east of the encroaching cold front. The area of moderate to fresh trades will gradually diminish through today. The old NW swell over the west-central and southwest waters will subside through the end of the week. The cold front will extend from 30N136W to 27N140W later this morning, from 30N127W to 25N140W early Thu and from 31N116W to 25N121W early Fri. Fresh to locally strong N-NE winds are forecast behind the front by this afternoon, along with continuing NW swell. By Fri, low pressure west of the area may extend a warm front across 140W with fresh to strong easterly winds north of it in the northwest corner of our area, along with building seas in W swell. Farther east, fresh to strong NW to N winds and building seas are likely north of 28N between 120W and 128W Thu night and Fri behind the aforementioned cold front. $$ Lewitsky