000 AXPZ20 KNHC 080820 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Thu Feb 8 2024 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 0800 UTC. ...SPECIAL FEATURES... Large N swell and NE wind waves: Large, long-period northerly swell is mixing with shorter period NE wind waves in an area of strong tradewinds N of the ITCZ creating dangerous confused seas. Seas greater than 12 ft cover the waters from 04N to 17N and west of 124W, with seas peaking near 15 ft. Areal coverage of seas greater than 12 ft will gradually decrease through the end of the week into the weekend as the swell slowly subsides, and the tradewinds slowly diminish. Seas are expected to subside below 12 ft by Saturday night. Please read the latest High Seas Forecast issued by the National Hurricane Center at the website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The equatorial trough extends from 07N77W to 03N96W. The ITCZ continues from 03N96W to 06N125W, then resumes from 07N130W to beyond 05N140W. Scattered moderate convection is noted from 02N to 06N between 87W and 91W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A ridge of high pressure extends across the waters off the Baja California peninsula. The pressure gradient between the ridge and lower pressure over Mexico is supporting moderate to locally fresh winds west of the Baja California peninsula SE to near the Revillagigedo Islands and in the entrance to the Gulf of California. A surface trough is in the northern Gulf of California. The pressure gradient between the ridge and trough is supporting fresh to strong gap winds in the northern Gulf of California. Moderate winds are over the Gulf of Tehuantepec. Light to gentle winds are elsewhere over the open waters off Mexico. NW swell is producing seas in the 8-11 ft range west of the Baja California peninsula southward to the Revillagigedo Islands. Seas of 4-6 ft are elsewhere over the open waters off Mexico. In the northern Gulf of California, seas are in the 3-5 ft range, with seas of 2-4 ft elsewhere in the Gulf. For the forecast, fresh to strong SW winds will prevail in the far northern Gulf of California today. Moderate winds will prevail over the waters west of the Baja California peninsula SE to near the Revillagigedo Islands. Large, long- period northerly swell over the offshore waters west of the Baja California peninsula south to the Revillagigedo Islands will persist today, then gradually subside through weekend. Looking ahead, the next Gulf of Tehuantepec gale force gap wind event is possible starting early next week. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR Fresh to strong gap winds, locally near gale force, are over the Gulf of Papagayo, with moderate winds extending downstream of the Gulf. Seas are in the 6-8 ft range in this area. Fresh to strong winds are over and downstream the Gulf of Panama, with seas in the 6-8 ft range. Light to gentle winds, and seas of 4-6 ft prevail elsewhere. For the forecast, gap winds in the Papagayo region will pulse to near gale force at night through Fri night. Otherwise, fresh to strong winds will prevail in the Papagayo region through early Sun. Fresh to strong winds will prevail over and downstream of Gulf of Panama through Sat. Elsewhere relatively benign conditions will prevail. ...REMAINDER OF THE AREA... Please see the Special Features Section for information on an ongoing large swell event. A ridge of high pressure prevails over the waters N of 20N. The pressure gradient between the ridge and lower pressure in the vicinity of the ITCZ is supporting a large area of fresh to strong trades N of the ITCZ to near 20N and W of 130W, as well as from 08N to 12N between 120W and 130W. Elsewhere N of the ITCZ, moderate to locally fresh winds prevail. South of the ITCZ, light to gentle winds are noted. Outside the area of 12 ft seas, seas of 8 ft or greater cover the waters W of a line 30N116W to 18N111W to 00N130W. Elsewhere, seas of 6-8 ft prevail. For the forecast, the ridge will slowly weaken through the weekend, decreasing areal coverage of the fresh to strong trade winds north of the ITCZ. Winds will diminish to moderate to fresh speeds by the second half of the weekend. Areal coverage of seas greater than 8 ft will also decrease the end of the week through the weekend. $$ AL