Tropical Weather Discussion
Issued by NWS
Issued by NWS
708 AXPZ20 KNHC 050908 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Wed Feb 5 2025 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. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 08.5N81W to 06N90W to 04N110W. The ITCZ extends from 04N110W to 06N124W to beyond 07N140W. Widely scattered moderate convection is noted from 02N to 07.5N east of 83W to coastal Colombia. Scattered moderate convection is noted from 02N to 07N between 87W and 108W and from 03N to 09N between 109W and 136W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A weak ridge across the eastern slopes of the Sierra Madre Mountains in eastern Mexico continues to supports fresh to locally strong NW to N gap winds in the Gulf of Tehuantepec to about 75 nm downstream. Rough seas to 8 ft accompany the strong winds in this area. Elsewhere across the Mexican offshore waters, the current pattern is dominated by 1019 mb high pressure centered west of Baja California Sur near 26N120W. This weak ridge is supporting gentle breezes across Mexican offshore waters of Baja Norte, becoming gentle to locally moderate from Punta Eugenia southward to Cabo Corrientes and beyond the Revillagigedo Islands. Seas are 4 to 5 ft in open waters outside of the Gulf of Tehuantepec, except to 6 ft near 150 nm offshore of Baja California. Moderate westerly gap winds have developed tonight across the northern Gulf of California, were seas are 3 to 4 ft. Gentle to locally moderate westerly gap winds prevail across the remainder of the Gulf, where seas are 1 to 3 ft. For the forecast, weakening high pressure ridge north of the region across the Gulf of Mexico will maintain fresh to occasionally strong N gap winds across the immediate Gulf of Tehuantepec waters through early Thu morning. Farther north, a weak frontal boundary will move into the waters off Baja California Norte late Wed, then will dissipate Wed night. Moderate NW swell will follow the front Wed and Wed night, then subside, with highest seas to 8 ft across the far NW waters. High pressure behind the front will support fresh NW winds and moderate to locally rough seas Thu and Fri off Baja California north of Cabo San Lazaro. Looking ahead, another front will move through central Baja California and the central Gulf of California Fri afternoon through Sat, accompanies by strong reinforcing NW winds and large N-NW swell, highest north of Cabo San Lazaro. This front will also bring moderate northwesterly winds to the Gulf of California during that time. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... High pressure across the western Atlantic extending into the NE Gulf of Mexico is enhancing trade flow across the southwest Caribbean and southern Central America, resulting in persistent gap winds across the Papagayo region, the Nicaraguan offshore waters and the Gulf of Fonseca, extending to near 90W. Seas are estimated to be 4 to 7 ft across this area except to 8 ft downstream of Papagayo. Moderate to fresh N winds are across the Gulf of Panama extending southward to 05N, where seas are 5 to 6 ft. Gentle breezes persist elsewhere, with 4 to 6 ft seas in southerly swell. For the forecast, little change in the regional weather pattern is expected through the weekend, as an east to west aligned ridge persists N of the area. This pattern will continue to support pulsing fresh to strong NE to E gap winds across the Papagayo region through the early Sat. Peak seas will build 7 to 8 ft downstream each late night through morning. Moderate N winds will pulse to locally fresh each evening and night across the Gulf of Panama through Fri night. Moderate or weaker winds and slight to moderate seas in SW swell will prevail elsewhere. ...REMAINDER OF THE AREA... A weakening cold front continues to move E-SE across the northern waters between 125W and 135W, extending from 30N125W to 27.5N133W. Moderate SW to W winds prevail ahead of the front, from N of 27N between 120W and 127W. Combined seas are 7 to 11 ft in mostly W-NW swell between 120W and 130W. Behind the front, large NW to N swell is building into the regional waters, with seas of 11 to 15 ft north of 26N, decreasing to 8 ft as far south as 21N. Southeast of the front, weak 1019 mb high pressure is centered near 26N120W, and is supporting moderate to locally fresh trade winds along and north of the ITCZ and monsoon trough to about 17N and W of 110W, as seen in recent satellite scatterometer data. Gentle breezes persist elsewhere N of the ITCZ, with 5 to 8 ft in a mix of NW and S swell. Active scattered moderate convection continues about the monsoon trough and ITCZ between 87W and 127W, as upper level troughing above the trade wind zone is producing favorable upper level conditions. For the forecast, the eastern portion of the cold front will move toward Baja California before stalling and becoming diffuse Wed afternoon and evening. The western half of the front will stall east to west along 28N Wed before lifting northward Wed night, ahead of a next front that will move to the southeast of 30N140W by early Thu. This next front will move into the Baja Norte waters on Fri, then stall and dissipate through Sat. Fresh to strong winds will accompany the front Thu, along with NW swell of 8 to 10 ft. Moderate to large W to NW swell will generally dominate the regional waters throughout the week. Farther to the southeast, seas will build north of the ITCZ east of 110W through early Wed due fresh trade winds, and southerly swell mixing with shorter period NE to E swell, originating from the gap winds over Papagayo and Tehuantepec. Looking ahead, trade winds and seas will build along and north of the ITCZ west of 120W Fri through Sun in response to high pressure building north of the area. $$ Stripling