000 AXPZ20 KNHC 032202 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Fri Feb 3 2023 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 1800 UTC surface analysis and satellite imagery through 2150 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Storm Warning: A strong cold front will continue to move across the Gulf of Mexico through this evening. Strong high pressure in its wake will build southward along the Sierra Madre mountains of Mexico leading to a significant tightening of the pressure gradient across southern Mexico. Gale force N winds in the Gulf of Tehuantepec extends southward to 12N with strong N to NE winds extending to 10N100W. Winds N of 12N are forecast to reach storm-force this evening and diminish back to strong gales during the early overnight hours. Afterward, winds will gradually diminish below gale-force early Sun. Very large seas will build with these gale to storm-force winds, peaking at 18-22 ft this evening into Sat morning. Please read the latest High Seas Forecast issued by the National Hurricane Center at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from near 08N78W to 08N86W to 04N94W to 03N103W. The ITCZ extends from 03N103W to 04N120W to 07N130W to 06N140W. No signficant convection observed. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please read the Special Features section for details on an upcoming Storm Warning in the Gulf of Tehuantepec. Gale force northerly winds currently prevail across the immediate Gulf waters where seas have built to 18 ft. Gale force winds are expected to end early Sun, then remain strong through Mon. High pressure located W of the Baja California peninsula continue to extend a ridge eastward across the offshore waters of Mexico while high pressure N of the area has slightly shifted eastward. This has reduced the presssure gradient, leading to moderate to locally fresh NW winds along the Gulf of California with seas to 3 ft. Moderate nW winds extends across the entrance of the gulf to the area of Jalisco where seas range between 5-6 ft. Light to gentle variable winds are elsewhere with seas to 6 ft in NW swell. For the forecast, outside of the Gulf of Tehuantepec, moderate to fresh winds in the Gulf of California are forecast to continue through early Sat. A decaying cold front will approach Baja California by late Sun, with high pressure building across the Baja waters with and behind it. This will produce fresh to strong NW-N winds offshore Baja California from Cabo San Lazaro northward Sun night through Mon night. Similar winds will spread south through the Gulf of California. New NW swell will arrive across the offshore Baja waters ahead of the front, and with the fresh to strong winds. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to strong NE winds are offshore of Nicaragua, including the Gulf of Papagayo area where seas of 5-8 ft prevail. Moderate N-NE winds are in the Gulf of Panama reaching the Azuero Peninsula and producing seas of 4-5 ft seas. Winds are mainly light to gentle elsewhere, along with 4-6 ft seas primarily in SW swell. For the forecast, fresh to strong NE to E winds across the Gulf of Papagayo region will prevail into early next week, near gale- force at times, producing periods of 7-10 ft seas. Large fresh swell generated by an upcoming Gulf of Tehuantepec storm-force gap wind event will continue to propagate through the Guatemala and El Salvador offshore waters this evening through Sun. Fresh to strong N-NE winds will pulse in the Gulf of Panama, mainly at night, through Sat night. REMAINDER OF THE AREA... A stationary front extends from 30N128W to 21N140W. Fresh to strong S-SW winds are north of 29N behind the front. Moderate to fresh winds are ahead of the front. NW swell producing seas of 8- 11 ft is north of 26N and west of 127W. High pressure southwest of the California Channel Islands extends a ridge southwestward ahead of the stationary front. Moderate to locally fresh trades are elsewhere north of the ITCZ to 21N and west of 112W, with gentle to moderate winds across the remainder of the open waters. Seas of 7-11 ft cover the waters north of the ITCZ to about 21N and west of 110W due to a combination of the winds related to the trough and background NW swell. Seas of 5-7 ft in mixed SW and NW swell prevail across the remainder of the waters. For the forecast, fresh to strong winds extending from a Gulf of Tehuantepec gap wind event will extend well southwest by this evening and reach to 110W by Sat. The stationary front in the northwest waters will weaken while a new cold front pushes southeast of 30N140W by Sat. The boundaries will merge by Sat afternoon and then push toward Baja California through the weekend. Strong high pressure will build in the wake of the boundaries with fresh to strong trades covering most of the waters west of 120W by Sun night, and moderate to fresh trades elsewhere north of the ITCZ by then. Similar conditions will continue into early next week. NW swell of 8 ft or greater associated with the boundaries will mainly be across the northern waters through Fri night, then push and expand across most of the waters west of 110W, aided by the fresh to strong trades. $$ Ramos