--------------------------------------------------------------------------- TROPICAL WEATHER DISCUSSION (EASTERN PACIFIC AREA) MESSAGES T1T2: AX A1A2: PZ Date: 2026-08-13 --------------------------------------------------------------------------- Message File: T_AXPZ20KNHC130317_C_KWBC_20260813031818_4522426-492-TWDEP.txt ****0000005062**** AXPZ20 KNHC 130317 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Thu Aug 13 2026 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 0000 UTC surface analysis and satellite imagery through 0300 UTC. ...SPECIAL FEATURES... Newly formed Tropical Depression Eight-E is centered near 18.1N 131.7W at 13/0300 UTC, moving west-northwest at 6 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 30 kt with gusts to 40 kt. Eight-E may intensify to a tropical storm early Thu and meander to the southwest through late Thu. Eight-E is expected to diminish thereafter as drier air moves into the area, and Eight-E may become a remnant low through Fri. Maximum seas may be reaching 10 ft within 60 nm of the center in the northwest quadrant, and may peak to 12 ft Thu. Please read the latest High Seas Forecast issued by the National Hurricane Center at website - https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml and the latest Eight-E NHC Forecast/Advisory and Public Advisory at www.hurricanes.gov for more details. Potential Tropical Cyclone One-C is centered west of the discussion area near 14.8N 143.5W at 13/0300 UTC, moving west at 8 kt. Estimated minimum central pressure is 1002 mb. Maximum sustained wind speed is 35 kt with gusts to 45 kt. Winds to tropical storm strength and seas to 13 ft are on the eastern periphery of PTC One-C, impacting the waters east of 140W from 12N to 17N between 137W and 140W. Winds and seas will diminish in this area over the next couple of hours as PTC One-C shifts more westward. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/HFOTCPCP2.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/HFOTCMCP2.shtml for more details. ...TROPICAL WAVES... The axis of a tropical wave is near 89W north of 02N, moving west at 10 to 15 kt. Nearby convection is discussed in the ITCZ/monsoon trough section below. The axis of a tropical wave is near 121W from 02N to 18N, moving westward at 10 to 15 kt. Nearby convection is discussed in the ITCZ/monsoon trough section below. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N84W to 09N104W. The ITCZ extends from 09N104W to 08N117W. Scattered moderate convection is from 02N to 08N east of 125W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Fresh to strong winds prevail over the Gulf of Tehuantepec. Gentle to moderate winds are found elsewhere. Moderate seas are over the open waters off Mexico, with slight to moderate seas over the Gulf of California. For the forecast, fresh to strong gap winds are expected across the Gulf of Tehuantepec through early next week. The pressure gradient between high pressure west of the area and lower pressures over northern Mexico will support moderate to locally fresh southerly winds across the northern Gulf of California tonight into Thu, then again on Thu night. A moderate pressure gradient will promote mostly gentle to moderate winds across the remainder offshore waters of Mexico along with moderate seas. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to locally strong E gap winds, and moderate seas, persist across and downstream the Gulf of Papagayo. Gentle to moderate winds and moderate seas in SW swell prevail elsewhere. For the forecast, moderate to fresh NE to E gap winds and occasionally rough seas will pulse across the Papagayo region. Gentle to moderate winds will prevail between the Galapagos Islands and Ecuador, with large southerly swell moving into the region starting Thu night. Light to gentle winds and moderate seas in SW swell are expected elsewhere. ...REMAINDER OF THE AREA... Please see Special Features section above for more on newly formed Tropical Depression Eight-E and on Potential Tropical Cyclone One-E. Broad ridging dominates the waters north of 20N. Outside of the area impacted by PTC One-C, the pressure gradient between the area of high pressure and Eight-E is supporting fresh to locally strong winds, and rough seas, from 15N to 22N between 130W and 140W. Rough seas in southerly swell cover the waters S of 05N between 105W and 130W. Gentle to moderate winds, and moderate seas prevail elsewhere. For the forecast, please see Special Features section above for more on Eight-E and PTC One-C. Elsewhere, the southerly swell will maintain rough seas over the discussion waters S of 05N between 95W and 130W through the end of the week. $$ Christensen ########################### END OF MESSAGE SET ############################ --------------------------------------------------------------------------- Message File: T_AXPZ20KNHC130345_C_KWBC_20260813034618_4522426-494-TWDEP.txt ****0000005247**** AXPZ20 KNHC 130345 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Thu Aug 13 2026 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 0000 UTC surface analysis and satellite imagery through 0300 UTC. ...SPECIAL FEATURES... Newly formed Tropical Depression Eight-E is centered near 18.1N 131.7W at 13/0300 UTC, moving west-northwest at 6 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 30 kt with gusts to 40 kt. Eight-E may intensify to a tropical storm early Thu and meander to the southwest through late Thu. Eight-E is expected to diminish thereafter as drier air moves into the area, and Eight-E may become a remnant low through Fri. Maximum seas may be reaching 10 ft within 60 nm of the center in the northwest quadrant, and may peak to 12 ft Thu. Scattered moderate convection is active within 60 nm of the center of Eight-E. Please read the latest High Seas Forecast issued by the National Hurricane Center at website - https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml and the latest Eight-E NHC Forecast/Advisory and Public Advisory at www.hurricanes.gov for more details. Potential Tropical Cyclone One-C is centered west of the discussion area near 14.8N 143.5W at 13/0300 UTC, moving west at 8 kt. Estimated minimum central pressure is 1002 mb. Maximum sustained wind speed is 35 kt with gusts to 45 kt. Winds to tropical storm strength and seas to 13 ft are on the eastern periphery of PTC One-C, impacting the waters east of 140W from 12N to 17N between 137W and 140W. Winds and seas will diminish in this area over the next couple of hours as PTC One-C shifts more westward. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/HFOTCPCP2.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/HFOTCMCP2.shtml for more details. ...TROPICAL WAVES... The axis of a tropical wave is near 90W north of 02N, moving west at 10 to 15 kt. Nearby convection is discussed in the ITCZ/monsoon trough section below. The axis of a tropical wave is near 123W from 02N to 18N, moving westward at 10 to 15 kt. Nearby convection is discussed in the ITCZ/monsoon trough section below. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N84W to 03N100W. The ITCZ extends from 08N100W to 09N118W. Scattered moderate to isolated strong convection is from 04N to 10N between 85W and 100W. Scattered moderate convection is from 09N to 13N between 100W and 110W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Fresh to strong winds prevail over the Gulf of Tehuantepec. Gentle to moderate winds are found elsewhere. Moderate seas are over the open waters off Mexico, with slight to moderate seas over the Gulf of California. For the forecast, fresh to strong gap winds are expected across the Gulf of Tehuantepec through early next week. The pressure gradient between high pressure west of the area and lower pressures over northern Mexico will support moderate to locally fresh southerly winds across the northern Gulf of California tonight into Thu, then again on Thu night. A moderate pressure gradient will promote mostly gentle to moderate winds across the remainder offshore waters of Mexico along with moderate seas. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to locally strong E gap winds, and moderate seas, persist across and downstream the Gulf of Papagayo. Gentle to moderate winds and moderate seas in SW swell prevail elsewhere. For the forecast, moderate to fresh NE to E gap winds and occasionally rough seas will pulse across the Papagayo region. Gentle to moderate winds will prevail between the Galapagos Islands and Ecuador, with large southerly swell moving into the region starting Thu night. Light to gentle winds and moderate seas in SW swell are expected elsewhere. ...REMAINDER OF THE AREA... Please see Special Features section above for more on newly formed Tropical Depression Eight-E and on Potential Tropical Cyclone One-E. Broad ridging dominates the waters north of 20N. Outside of the area impacted by PTC One-C, the pressure gradient between the area of high pressure and Eight-E is supporting fresh to locally strong winds, and rough seas, from 15N to 22N between 130W and 140W. Rough seas in southerly swell cover the waters S of 05N between 105W and 130W. Gentle to moderate winds, and moderate seas prevail elsewhere. For the forecast, please see Special Features section above for more on Eight-E and PTC One-C. Elsewhere, the southerly swell will maintain rough seas over the discussion waters S of 05N between 95W and 130W through the end of the week. $$ Christensen ########################### END OF MESSAGE SET ############################ --------------------------------------------------------------------------- Message File: T_AXPZ20KNHC130841_C_KWBC_20260813084222_4522426-516-TWDEP.txt ****0000004196**** AXPZ20 KNHC 130841 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Thu Aug 13 2026 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 0830 UTC. ...SPECIAL FEATURES... Newly named Tropical Storm Hernan is centered near 18.1N 131.9W at 13/0900 UTC, moving west at 2 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 35 kt with gusts to 45 kt. Hernan is expected to diminish thereafter as drier air moves into the area, and may become a remnant low through Fri. Maximum seas are reaching 11 ft within 60 nm of the center in the northwest quadrant, and may peak to 12 ft Thu. Scattered moderate convection is active within 60 nm of the center of Hernan. Please read the latest High Seas Forecast issued by the National Hurricane Center at website - https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml and the latest Eight-E NHC Forecast/Advisory and Public Advisory at www.hurricanes.gov for more details. ...TROPICAL WAVES... The axis of a tropical wave is near 92W north of 02N, moving west at 10 to 15 kt. Nearby convection is discussed in the ITCZ/monsoon trough section below. The axis of a tropical wave is near 123W/124W from 02N to 18N, moving westward at 10 to 15 kt. Nearby convection is discussed in the ITCZ/monsoon trough section below. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N78W to 07N95W to 08N110W. The ITCZ extends from 08N110W to 09N120W. Scattered moderate to isolated strong convection is from 05N to 13N between 85W and 105W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Moderate to fresh winds prevail over the Gulf of Tehuantepec. Gentle to moderate winds are found elsewhere. Moderate seas are over the open waters off Mexico, with slight to moderate seas over the Gulf of California. For the forecast, fresh to strong gap winds are expected across the Gulf of Tehuantepec through early next week. The pressure gradient between high pressure west of the area and lower pressures over northern Mexico will support moderate to locally fresh southerly winds across the northern Gulf of California tonight into Thu, then again on Thu night. A moderate pressure gradient will promote mostly gentle to moderate winds across the remainder offshore waters of Mexico along with moderate seas. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to strong E gap winds and moderate seas persist across and downstream the Gulf of Papagayo. Gentle to moderate winds and moderate seas in SW swell prevail elsewhere. For the forecast, moderate to fresh NE to E gap winds and occasionally rough seas will pulse across the Papagayo region. Gentle to moderate winds will prevail between the Galapagos Islands and Ecuador, with large southerly swell moving into the region starting Thu night. Light to gentle winds and moderate seas in SW swell are expected elsewhere. ...REMAINDER OF THE AREA... Please see Special Features section above for more on newly named Tropical Storm Hernan. Broad ridging dominates the waters north of 20N. Outside of the area impacted by Hernan, the pattern is supporting fresh to locally strong winds, and rough seas, from 15N to 22N between 130W and 140W. Rough seas in southerly swell cover the waters S of 05N between 105W and 130W. Gentle to moderate winds, and moderate seas prevail elsewhere. For the forecast, please see Special Features section above for more on Hernan. Elsewhere, the southerly swell will maintain rough seas over the discussion waters S of 05N between 95W and 130W through the end of the week. $$ Christensen ########################### END OF MESSAGE SET ############################ --------------------------------------------------------------------------- Message File: T_AXPZ20KNHC131453_C_KWBC_20260813145325_31523192-678-TWDEP.txt ****0000004271**** AXPZ20 KNHC 131453 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Thu Aug 13 2026 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 1450 UTC. ...SPECIAL FEATURES... Tropical Storm Hernan is centered near 18.0N 131.9W at 13/1500 UTC, moving west-southwest at 3 kt. Estimated minimum central pressure is 1004 mb. Maximum sustained wind speed is 40 kt with gusts to 50 kt. Seas are peaking near 13 ft, or 4 M. Scattered moderate to strong convection is noted within 60 nm NE semicircle. A slow southwestward to southward motion is expected over the next 24-36 hours. Little change in intensity is expected over the next 12 hours or so, followed by gradual weakening as Hernan encounters increasingly dry mid-level air. Please read the latest HIGH SEAS FORECAST issued by the National Hurricane Center at website - https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml and the latest Hernan NHC Forecast/Advisory and Public Advisory at www.hurricanes.gov for more details. ...TROPICAL WAVES... The axis of a tropical wave is near 94W north of 02N, moving west at 10 to 15 kt. Nearby convection is discussed in the ITCZ/monsoon trough section below. The axis of a tropical wave is near 125W from 02N to 18N, moving westward at 10 to 15 kt. Nearby convection is discussed in the ITCZ/monsoon trough section below. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N84W to 08N92W to 08N101W. The ITCZ extends from 08N101W to 10N121W. Scattered moderate to isolated strong convection is from 04N to 10N between 85W and 101W, and from 03N to 13N between 102W and 134W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Fresh to locally strong winds prevail over the Gulf of Tehuantepec. Fresh SW gap winds are impacting the northern Gulf of California. Gentle to moderate winds are found elsewhere. Moderate seas are over the open waters off Mexico, with slight to moderate seas over the Gulf of California. For the forecast, pulses of fresh to strong gap winds across the Gulf of Tehuantepec will diminish through tonight, then return Fri through Mon. A moderate pressure gradient will promote mostly gentle to moderate winds across the remainder offshore waters of Mexico along with moderate seas. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to strong E gap winds and moderate seas persist across and downstream the Gulf of Papagayo. Gentle to moderate winds and moderate seas in SW swell prevail elsewhere. For the forecast, moderate to fresh NE to E gap winds and occasionally rough seas will pulse across the Papagayo region. Gentle to moderate winds will prevail between the Galapagos Islands and Ecuador, with large southerly swell moving into the region starting Thu night. Light to gentle winds and moderate seas in SW swell are expected elsewhere. ...REMAINDER OF THE AREA... Please see Special Features section above for more on Tropical Storm Hernan. Broad ridging dominates the waters north of 20N. Outside the immediate area impacted by Hernan, the pressure gradient between the ridge, Hernan, and newly formed Tropical Storm Lala in the central Pacific is supporting fresh to locally strong winds, and rough seas, from 12N to 22N between 130W and 140W. Rough seas in southerly swell cover the waters S of 05N between 100W and 125W. Gentle to moderate winds, and moderate seas prevail elsewhere. For the forecast, Hernan will move to 17.6N 132.0W this evening, 17.1N 132.1W Fri morning, weaken to a remnant low near 16.5N 132.7W Fri evening. Elsewhere, southerly swell will maintain rough seas over the discussion waters S of 05N between 95W and 130W through the end of the week. $$ AL ########################### END OF MESSAGE SET ############################ --------------------------------------------------------------------------- Message File: T_AXPZ20KNHC132105_C_KWBC_20260813210529_4522426-552-TWDEP.txt ****0000004525**** AXPZ20 KNHC 132105 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Thu Aug 13 2026 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 2100 UTC. ...SPECIAL FEATURES... Tropical Storm Hernan is centered near 17.3N 131.9W at 13/2100 UTC, moving south at 5 kt. Estimated minimum central pressure is 1003 mb. Maximum sustained wind speed is 40 kt with gusts to 50 kt. Seas are peaking near 13 ft, or 4 M. Scattered moderate to strong convection is noted within 60 nm in the NE semicircle. Hernan is moving southward at around 5 kt. A gradual turn toward the southwest and then west-southwest is forecast from Friday into this weekend. Strong westerly shear is expected to support gradual weakening tonight. By early Friday, increasing dry mid- level air will further weaken the system. Please read the latest HIGH SEAS FORECAST issued by the National Hurricane Center at website - https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml and the latest Hernan NHC Forecast/Advisory and Public Advisory at www.hurricanes.gov for more details. ...TROPICAL WAVES... The axis of a tropical wave is near 95W north of 02N, moving west at 10 to 15 kt. Nearby convection is discussed in the ITCZ/monsoon trough section below. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N84W to 07N94W to 07N102W. The ITCZ extends from 07N102W to 10N122W. Scattered moderate to isolated strong convection is from 06N to 11N between 85W and 104W, from 02N to 14N between 104W and 120W, and from 00N to 10N between 130W and 135W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Moderate to locally fresh winds prevail over the Gulf of Tehuantepec. Moderate to locally fresh SW gap winds are impacting the northern Gulf of California. Gentle to moderate winds are found elsewhere. Moderate seas are over the open waters off Mexico, with slight to moderate seas over the Gulf of California. For the forecast, pulses of fresh to strong gap winds are expected across the Gulf of Tehuantepec through early next week. A moderate pressure gradient will promote mostly gentle to moderate winds across the remainder offshore waters of Mexico along with moderate seas. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to locally strong E gap winds and moderate seas persist across and downstream the Gulf of Papagayo. Gentle to moderate winds and moderate seas in SW swell prevail elsewhere. For the forecast, fresh to strong NE to E gap winds and occasionally rough seas will pulse across the Papagayo region through early next week. Gentle to moderate winds will prevail between the Galapagos Islands and Ecuador, with large southerly swell moving into the region starting tonight and Fri, then again early next week. Light to gentle winds and moderate seas in SW swell are expected elsewhere. ...REMAINDER OF THE AREA... Please see Special Features section above for more on Tropical Storm Hernan. Broad ridging dominates the waters north of 20N. Outside the immediate area impacted by Hernan, the pressure gradient between the ridge, Hernan, and Tropical Storm Lala in the central Pacific is supporting fresh to locally strong winds, and rough seas, from 13N to 21N between 130W and 140W. Rough seas in southerly swell cover the waters S of 05N between 97W and 122W. Gentle to moderate winds, and moderate seas prevail elsewhere. For the forecast, Hernan will move to 16.8N 132.0W Fri morning, weaken to a tropical depression near 16.2N 132.4W Fri afternoon, become a remnant low and move to 15.9N 133.6W Sat morning, 15.4N 135.1W Sat afternoon, 15.0N 136.9W Sun morning, and dissipate Sun afternoon. Elsewhere, southerly swell will maintain rough seas over the discussion waters S of 05N between 95W and 130W through the end of the week. Another set of southerly swell is forecast to bring rough seas to the waters S of 05N between 95W and 120W early next week. $$ AL ########################### END OF MESSAGE SET ############################