{"msg": "596\nAXPZ20 KNHC 120842\nTWDEP \nTropical Weather Discussion\nNWS National Hurricane Center Miami FL\n1005 UTC Wed Aug 12 2026\nTropical Weather Discussion for the eastern Pacific Ocean from\n03.4S to 30N, east of 120W including the Gulf of California, and\nfrom the Equator to 30N, between 120W and 140W. The following\ninformation is based on satellite imagery, weather observations,\nradar, and meteorological analysis.\nBased on 0600 UTC surface analysis and satellite imagery through\n0830 UTC.\n...SPECIAL FEATURES...\nWestern East Pacific (EP99): A low pressure system located about\nmidway between Hawaii and the west coast of Mexico near 17N130W \nis producing disorganized shower and thunderstorm activity. Any \nsignificant increase in the organization of the showers and \nthunderstorms would result in the formation of a tropical \ndepression on Wednesday. The system is forecast to move \nnorthwestward at 5 to 10 mph over the next couple of days and \nencounter less favorable environmental conditions late this week.\nThere is a high chance for tropical cyclone formation in the \nnext 24 hours. \n...TROPICAL WAVES...\nThe axis of a tropical wave is near 88W north of 06N through \nCentral America into the NW Caribbean, moving west at 10 to 15 \nkt. Nearby convection is discussed in the ITCZ/monsoon trough \nsection below.\nThe axis of a tropical wave is near 118W from 02N to 18N, moving\nwestward at 10 to 15 kt. Nearby convection is discussed in the \nITCZ/monsoon trough section below.\n...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...\nThe monsoon trough extends from 09N78W to 07N113W, and from\n1010 mb low pressure near 17N130W to beyond 14N140W. Scattered \nmoderate convection is from 04N to 08N east of 100W, from 09N to \n13N between 100W and 115W, and from 08N to 14N between 100W and \n110W, and from 10N to 18N between 130W and 140W.\n...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...\nFresh to near- gale force winds, and rough seas, prevail over the\nGulf of Tehuantepec. A recent scatterometer satellite pass\nconfirmed gap winds to 30 kt in the Gulf of Tehuantepec. Gentle \nto moderate winds are found elsewhere. Moderate seas are \nelsewhere over the open waters off Mexico, with slight to \nmoderate seas over the Gulf of California.\nFor the forecast, fresh to strong gap winds and rough seas are\nexpected across the Gulf of Tehuantepec through the middle of\nthe week. Winds will then briefly diminish through the end of\nthe week before strengthening again this weekend. The pressure\ngradient between high pressure W of the area and lower pressures\nover northern Mexico will support moderate to locally fresh\nsoutherly winds across the northern Gulf of California Wed night\ninto Thu. A moderate pressure gradient will promote mostly \ngentle to moderate winds across the remainder offshore waters of \nMexico along with moderate seas. \n...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, \nAND WITHIN 750 NM OF ECUADOR...\nFresh to strong E gap winds, and moderate to locally rough seas,\npersist across and downstream the Gulf of Papagayo. Gentle to \nmoderate winds and moderate seas in SW swell prevail elsewhere. \nFor the forecast, moderate to fresh NE to E gap winds and occasionally\nrough seas will pulse across the Papagayo region. Gentle to\nmoderate winds will prevail between the Galapagos Islands and\nEcuador. Southerly swell will bring rough seas to these waters\nSun. Light to gentle winds and moderate seas in SW swell are\nexpected elsewhere. The Telica volcano in Nicaragua, located\nnear 12.6N 86.8W, is producing a plume of volcanic ash that\nreaches offshore to near 12N88W. Mariners should exercise\ncaution over these waters. In the event mariners encounter\nvolcanic ash, they are encouraged to report the observation to\nthe National Hurricane Center by calling 305-229-4425. \n...REMAINDER OF THE AREA...\nBroad ridging dominates the waters north of 20N. The pressure\ngradient between this area of high pressure and low pressure\nwithin the monsoon trough is supporting a large swath of fresh to\nstrong winds N of the monsoon trough to near 20N and west of \n125W. Fresh to strong winds are also noted south of the monsoon \ntrough and west of 135W. Rough seas cover these waters. \nConvergence with the broad area of fresh to strong winds is \ngenerating a large area of disorganized showers and \nthunderstorms. Gentle to moderate winds, and moderate seas \nprevail elsewhere.\nFor the forecast, winds and seas are forecast to increase across\nthe west- central portion of the forecast region by the middle \npart of the week as a potential tropical cyclone develops, as\ndiscussed in the Special Features section above.\n", "title": "Eastern Pacific Tropical Weather Discussion", "id": "1200795677531570183", "issued": "2026-08-12T10:05:00Z", "wmo": "AXPZ20", "source": "NOAA/NWS National Hurricane Center, received via the National Weather Wire Service", "page": "https://hurricane.terrapin.com/text/1200795677531570183"}