000 AXPZ20 KNHC 121507 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Sat Jul 12 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 1200 UTC surface analysis and satellite imagery through 1400 UTC. ...TROPICAL WAVES... The axis of a tropical wave is near 84W from 06N northward across Costa Rica and into the Caribbean Sea, moving westward around 10 kt. Nearby convection is described in the ITCZ/monsoon trough section below. The axis of a tropical wave is near 94W from 03N to 15N, just offshore the border of Guatemala and Mexico, moving westward at 5 to 10 kt. Nearby convection is described in the ITCZ/monsoon trough section below. The axis of a tropical wave is near 113W from 06N to 20N, moving westward around 10 kt. Nearby convection is described in the ITCZ/monsoon trough section below. The axis of a tropical wave is near 124W from 05N to 16N, moving westward around 10 kt. Nearby convection is described in the ITCZ/monsoon trough section below. The axis of a tropical wave is near 132.5W from 04N to 17N, moving westward at 10 to 15 kt. Nearby convection is described in the ITCZ/monsoon trough section below. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 1010 mb low pressure near northern Colombia at 10N76.5W to across southern Costa Rica to 08N94W to 11N108W to 08N116.5W. The ITCZ is noted from 08N116.5W to 11N122.5W, resuming west of a tropical wave at 10N125W to 09N131.5W, resuming west of another tropical wave at 08N134W to beyond 06N140W. Numerous moderate isolated strong convection is noted from 04N to 09N between 77W and 86W. Scattered moderate convection is noted from 04N to 10N between 90W and 105W, from 11N to 16.5N between 90W and 96.5W, and from 10.5N to 12N between 124.5W and 126.5W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A surface trough extends from the northern Gulf of California through the Baja California Peninsula. Locally fresh S to SE winds are noted in the northern Gulf as a result of the pressure gradient between this trough and ridging to the east. Seas of 2 to 4 ft are noted in this region. Otherwise, ridging extends over the remainder of the Mexico offshore waters, supporting mainly gentle to moderate northerly winds and 4 to 6 ft seas in mixed NW and S swell. For the forecast, fresh S to SE winds are expected across the northern Gulf of California today as surface troughing dominates the region. Winds will diminish for the rest of this weekend before fresh winds redevelop in the northern Gulf early next week. Elsewhere, moderate to locally fresh N winds will pulse in the Gulf of Tehuantepec into early next week. Otherwise, moderate or weaker winds and moderate seas are expected over the remainder of the waters into next week. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to locally strong E to NE winds and seas of 5 to 7 ft were noted in the Gulf of Papagayo supported by low pressure over northern Colombia. Moderate to locally fresh E winds extend beyond the Papagayo region to areas well offshore of El Salvador and Guatemala. Elsewhere, moderate S to SW winds are occurring south of the monsoon trough. A long period southern hemisphere swell is leading to seas of 5 to 7 ft across the regional waters. For the forecast, fresh to locally strong E to NE winds are expected in the Gulf of Papagayo through early afternoon, with pulsing moderate winds likely on Sun. Winds will restrengthen to fresh to strong speeds by early next week. Elsewhere, a new S to SW swell will move through the equatorial waters late in the weekend into early next week, promoting rough seas south of 05N. Otherwise, moderate to occasionally fresh S to SW winds will occur south of the monsoon trough through early next week, with gentle to moderate winds occurring to the north. ...REMAINDER OF THE AREA... Ridging prevails across the waters north of 20N. Mainly moderate N to NE trades are noted north of 20N and west of 130W, and from 10N to 20N west of 120W. Winds are slightly weaker elsewhere north of the monsoon trough and ITCZ. Moderate to locally fresh S to SE winds are occurring over the waters south of the monsoon trough and ITCZ. Seas of 5 to 7 ft in mixed N and SE swell dominate the open waters, except rough near the Equator west of 105W. For the forecast, ridging will continue to dominate the waters north of the monsoon trough and ITCZ into next week, supporting moderate to occasionally fresh N to NE winds. Moderate seas in mixed N and SE swell are expected in this area, with locally rough seas possible north of 28N as a new N swell moves into the northern waters this weekend, with another set across the same area by the middle of next week. Elsewhere, rough seas in the equatorial waters will temporarily subside today before a new S swell moves through the southern waters by Sun. Expect rough seas south of 07N into the middle of next week. $$ Lewitsky
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Page last modified: Saturday, 12-Jul-2025 18:15:11 UTC