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Tropical Storm Aletta Forms West of Mexico

Tropical Storm Aletta formed over the Eastern North Pacific Ocean west of Mexico on Thursday afternoon.  This is the latest date for the formation of the first tropical storm over the Eastern North Pacific basin during the satellite era.  At 5:00 p.m. EDT on Thursday the center of Tropical Storm Aletta was located at latitude 17.9°N and longitude 107.0°W which put the center about 190 miles (310 km) west-southwest of Manzanillo, Mexico.  Aletta was moving toward the northwest at 10 m.p.h. (16 km/h).  The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h).  The minimum surface pressure was 1005 mb.

A low pressure system over the Eastern North Pacific Ocean west of Mexico strengthened on Thursday afternoon and the U.S. National Hurricane Center designated the system as Tropical Storm Aletta.  More thunderstorms formed near the center of Aletta’s circulation.  Thunderstorms were also occurring in a band in the western part of Tropical Storm Aletta.  Bands in the other parts of Aletta’s circulation consisted primarily of showers and lower clouds.  Storm near the center of Aletta began to generate upper level divergence that pumped mass away from the tropical storm.

The circulation around Tropical Storm Aletta was very small.  Winds to tropical storm force extended out 45 miles (75 km) in the northern half of Aletta’s circulation.  The winds in the souther half of Tropical Storm Aletta were blowing at less than tropical storm force.

Tropical Storm Aletta will move into an environment that will become unfavorable for intensification during the next 24 hours.  Aletta will move over water where the Sea Surface Temperatures are near 26°C.  It will move under the southern part of an upper level ridge over the Southwest U.S.  The upper level ridge will produce easterly wind that will blow toward the top of Aletta’s circulation.  Those winds will cause moderate vertical wind shear.  Tropical Storm Aletta could intensify a little during Thursday night, but cooler water and moderate wind shear are likely to end the intensification by Friday morning.  Aletta is likely to weaken to a tropical depression on Friday.

Tropical Storm Aletta will move around the southern side of a high pressure system over the Eastern North Pacific Ocean.  The high pressure system will steer Aletta toward the west during the next 24 hours.  On its anticipated track, Tropical Storm Aletta will move farther away from the coast of Mexico.

Tropical Storm Beatriz Moves Along West Coast of Mexico

Tropical Storm Beatriz was moving along the west coast of Mexico on Saturday morning. At 8:00 a.m. EDT on Saturday the center of Tropical Storm Beatriz was located at latitude 19.8°N and longitude 105.4°W which put it about 45 miles (75 km) south-southeast of Cabo Corrientes, Mexico. Beatriz was moving toward the northwest at 13 m.p.h. (20 km/h). The maximum sustained wind speed was 60 m.p.h. (75 km/h) and there were wind gusts to 75 m.p.h. (120 km/h). The minimum surface pressure was 1001 mb.

Tropical Storm Warnings were in effect for the portions of the coast from Manzanillo to Punta Mita, Mexico. A Tropical Storm Watch was in effect for the portion of the coast from Punta Mita to San Blas, Mexico. A Tropical Storm Watch was also in effect for Las Islas Marias.

The center of former Hurricane Beatriz made a landfall near Punta San Telmo, Mexico during Friday night. When the center of Beatriz made landfall, it significantly disrupted the inner core of Beatriz’ circulation. The disruption of the inner core caused Beatriz to weaken to a tropical storm. The distribution of thunderstorms in Tropical Storm Beatriz became asymmetrical after if made landfall. Most of the thunderstorms were occurring in bands in the western half of Beatriz’ circulation. Bands in the eastern part of the tropical storm consisted primarily of showers and lower clouds. Winds to tropical storm force extended out 80 miles (130 km) from the center of Tropical Storm Beatriz.

Former Hurricane Beatriz brought gusty winds and locally heavy rain to the west coast of Mexico from Punta San Telmo to Cabo Corrientes during Friday night. The heaviest rain fell along the coast in Michoacan, Colima and Jalisco.

Tropical Storm Beatriz will move through an environment that will be only marginally favorable for intensification during the next 36 hours. Beatriz will move over water where the Sea Surface Temperatures are near 28˚C. It will move under the southern part of an upper level ridge over northern Mexico. The upper level ridge will produce easterly winds that will blow toward the top of Beatriz’ circulation. Those winds will cause the wind shear to increase. Since Tropical Storm Beatriz is near the west coast of Mexico, it’s circulation will pull drier air into the eastern and northern parts of Beatriz. The drier air will inhibit the formation of thunderstorms in those parts of the circulation. Since the inner core of Tropical Storm Beatriz was disrupted when it moved over the coast, Beatriz is likely to continue to weaken during the next 36 hours.

The upper level ridge over northern Mexico will steer Tropical Storm Beatriz toward the northwest during the next 36 hours. On its anticipated track, Tropical Storm Beatriz will gradually move away from the west coast of Mexico. The gusty winds and locally heavy rain in Jalisco will gradually diminish on Saturday. Beatriz could move southeast of Baja California on Sunday.

Elsewhere over the Eastern North Pacific Ocean, Hurricane Adrian weakened south of Baja California. At 5:00 a.m. EDT on Saturday the center of Hurricane Adrian was located at latitude 18.1°N and longitude 114.0°W which put it about 425 miles (685 km) southwest of the southern tip of Baja California. Adrian was moving toward the west-northwest at 7 m.p.h. (11 km/h). The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 95 m.p.h. (150 km/h). The minimum surface pressure was 983 mb.

Beatriz Rapidly Intensifies to a Hurricane

Former Tropical Storm Beatriz rapidly intensified to a hurricane over the Eastern North Pacific Ocean south of Lazaro Cardenas, Mexico on Friday morning. At 11:00 a.m. EDT on Friday the center of Hurricane Beatriz was located at latitude 17.3°N and longitude 102.3°W which put it about 50 miles (80 km) south of Lazaro Cardenas, Mexico. Beatriz was moving toward the northwest at 13 m.p.h. (20 km/h). The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h). The minimum surface pressure was 991 mb.

A Hurricane Warning was in effect for the portion of the coast from Zihuatenajo to Cabo Corrientes, Mexico. The Hurricane Warning included Manzanillo. A Hurricane Watch was in effect for the portion of the coast from Cabo Corrientes to Punta Mita, Mexico. Tropical Storm Warnings were in effect for the portions of the coast from Tecpan de Galeana to Zihuatenajo and from Cabo Corrientes to Punta Mita, Mexico. A Tropical Storm Watch was in effect for the portion of the coast from Punta Mita to San Blas, Mexico. A Tropical Storm Watch was also in effect for Las Islas Marias.

Former Tropical Storm Beatriz rapidly intensified to a hurricane on Friday morning. The inner end of a rainband wrapped around the center of Beatriz’ circulation. Visible and microwave satellite images showed that an eye was forming at the center of Hurricane Beatriz. Bands of showers and thunderstorms were revolving around the core of Beatriz. Storms near the core generated upper level divergence that pumped mass away from the hurricane.

The circulation around Hurricane Beatriz was small. Winds to hurricane force extended out 15 miles (25 km) in the northeastern quadrant of Beatriz’ circulation. Winds to tropical storm force extended out 70 miles (110 km) from the center of circulation.

Hurricane Beatriz will move through an environment favorable for intensification during the next 12 hours. Beatriz will move over water where the Sea Surface Temperatures are near 30˚C. It will move under the southwestern part of an upper level ridge over Mexico and the southern U.S. The upper level ridge will produce easterly winds that will blow toward the top of Hurricane Beatriz. However, the winds in the lower levels of the atmosphere will also blow from the east. So, there will be little vertical wind shear. Hurricane Beatriz is likely to intensify during the next 12 hours. Beatriz will be near the coast of Mexico on Saturday. If the core of Hurricane Beatriz remains over the Eastern North Pacific Ocean, then it will be in an environment favorable for intensification. If Beatriz moves over land on Saturday, it will weaken quickly.

The upper level ridge over Mexico and the southern U.S. will steer Hurricane Beatriz toward the northwest during the next 24 hours. On its anticipated track, Hurricane Beatriz will move very close to the coast of Mexico. The center of Beatriz could be near Manzanillo by Friday night. Beatriz could make landfall near Manzanillo or the center of circulation could pass just to the west of Manzanillo. Bands in the northern side of Hurricane Beatriz will bring strong winds and locally heavy rain to parts of the west coast of Mexico. Beatriz will bring strong winds and locally heavy rain to Guerrero, Michoacan, Colima and Jalisco. Heavy rain could cause flash floods in some locations.

Elsewhere over the Eastern North Pacific Ocean, Hurricane Adrian intensified south-southwest of Baja California. At 11:00 a.m. EDT on Friday the center of Hurricane Adrian was located at latitude 17.3°N and longitude 112.2°W which put it about 415 miles (665 km) south-southwest of the southern tip of Baja California. Adrian was moving toward the northwest at 7 m.p.h. (11 km/h). The maximum sustained wind speed was 105 m.p.h. (165 km/h) and there were wind gusts to 125 m.p.h. (200 km/h). The minimum surface pressure was 970 mb.

Mexico Issues Tropical Storm Watches and Warnings

The government of Mexico issued Tropical Storm Watches and Tropical Storm Warnings for the west coast of Mexico on Wednesday night. A Tropical Storm Warning was in effect for the portion of the coast from Punta Maldonado to Lazaro Cardenas, Mexico. The Tropical Storm Warning included Acapulco. A Tropical Storm Watch was in effect for the portion of the coast from Lazaro Cardenas to Manzanillo, Mexico.

A low pressure system over the Eastern North Pacific Ocean is forecast to strengthen to a tropical storm during the next several days as it moves near the coast of Mexico. The low pressure system was designated as Potential Tropical Cyclone Two-E on Wednesday night. At 11:00 p.m. EDT on Wednesday the center of Potential Tropical Cyclone Two-E was located at latitude 13.5°N and longitude 96.8°W which put it about 315 miles (505 km) southeast of Acapulco, Mexico. It was moving toward the northwest at 12 m.p.h. (19 km/h). The maximum sustained wind speed was 30 m.p.h. (50 km/h) and there were wind gusts to 40 m.p.h. (65 km/h). The minimum surface pressure was 1007 mb.

A low pressure system over the Eastern North Pacific Ocean southeast of Acapulco exhibited more organization on Wednesday night. The U.S. National Hurricane Center designated the system as Potential Tropical Cyclone Two-E. More thunderstorms formed in bands in the eastern side of Potential Tropical Cyclone Two-E. Storms near the center of circulation began to generate upper level divergence that pumped mass away from the system. Removal of mass will allow the surface pressure to decrease.

Potential Tropical Cyclone Two-E will move through an environment favorable for intensification during the next 36 hours. It will move over water where the Sea Surface Temperatures are near 30˚C. It will move under the southwestern part of an upper level ridge over Mexico and the southern U.S. The upper level ridge will produce easterly winds that will blow toward the top of Potential Tropical Cyclone Two-E. However, the winds in the lower levels of the atmosphere will also blow from the east. So, there will be little vertical wind shear. Potential Tropical Cyclone Two-E is likely to intensify during the next 36 hours. It could strengthen to a tropical depression during the next 12 hours. Potential Tropical Cyclone Two-E could intensify to a tropical storm during the next 24 hours.

The upper level ridge over Mexico and the southern U.S. will steer Potential Tropical Cyclone Two-E toward the northwest during the next 36 hours. On its anticipated track, Potential Tropical Cyclone Two-E will move closer to the coast of Mexico. It could be south of Acapulco on Thursday. Bands in the northern side of Potential Tropical Cyclone Two-E could bring gusty winds and locally heavy rain to parts of the west coast of Mexico. Locally heavy rain could fall in parts of Oaxaca, Guerrero and Jalisco. Heavy rain could cause flash floods in some locations.

Elsewhere over the Eastern North Pacific Ocean, Hurricane Adrian was spinning southwest of Manzanillo. At 11:00 p.m. EDT on Wednesday the center of Hurricane Adrian was located at latitude 15.4°N and longitude 109.0°W which put it about 395 miles (640 km) southwest of Manzanillo, Mexico. Adrian was moving toward the west at 6 m.p.h. (10 km/h). The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 95 m.p.h. (150 km/h). The minimum surface pressure was 986 mb.

Adrian Rapidly Intensifies to a Hurricane

Former Tropical Storm Adrian rapidly intensified to a hurricane over the Eastern North Pacific Ocean southwest of Manzanillo, Mexico on Wednesday morning. At 11:00 a.m. EDT on Wednesday the center of Hurricane Adrian was located at latitude 15.2°N and longitude 108.0°W which put it about 360 miles (575 km) southwest of Manzanillo, Mexico. Adrian was moving toward the west at 8 m.p.h. (13 km/h). The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h). The minimum surface pressure was 989 mb.

Former Tropical Storm Adrian rapidly intensified to a hurricane on Wednesday morning. Microwave satellite images showed that a small circular eye had formed at the center of Adrian’s circulation. A ring of strong thunderstorms surrounded the eye and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were revolving around the core of Hurricane Adrian. Storms near the core of Adrian generated strong upper level divergence that pumped mass away from the hurricane.

The circulation around Hurricane Adrian was small. Winds to hurricane force extended out 15 miles (25 km) in the northeastern quadrant of Adrian’s circulation. Winds to tropical storm force extended out 60 miles (95 km) from the center of Hurricane Adrian.

Hurricane Adrian will move through an environment very favorable for intensification during the next 24 hours. Adrian will move over water where the Sea Surface Temperatures are near 28˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Hurricane Adrian will intensify during the next 24 hours. Adrian could intensify rapidly at times.

Hurricane Adrian will move around the southern side of a high pressure system that extends from Mexico to over the Eastern North Pacific Ocean. The high pressure system will steer Adrian toward the west during the next 24 hours. On its anticipated track, Hurricane Adrian will move farther away from the west coast of Mexico.

Tropical Storm Adrian Forms Southwest of Mexico

Tropical Storm Adrian formed over the Eastern North Pacific Ocean southwest of Mexico on Tuesday afternoon. At 5:00 p.m. EDT on Tuesday the center of Tropical Storm Adrian was located at latitude 15.3°N and longitude 106.0°W which put it about 280 miles (450 km) south-southwest of Manzanillo, Mexico. Adrian was moving toward the west at 15 m.p.h. (24 km/h). The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h). The minimum surface pressure was 1002 mb.

The circulation around a low pressure system over the Eastern North Pacific Ocean southwest of Mexico organized quickly during Tuesday and the U.S. National Hurricane Center designated the system as Tropical Storm Adrian. A well defined low level center of circulation developed at the center of the low pressure system. Thunderstorms formed rapidly neat the center of Adrian’s circulation. Many other thunderstorms formed in bands revolving around the center of circulation. Storms near the center of Adrian began to generated upper level divergence that pumped mass away from the tropical storm. Winds to tropical storm force extended out 45 miles (75 km) from the center of Tropical Storm Adrian.

Tropical Storm Adrian will move through an environment very favorable for intensification during the next 36 hours. Adrian will move over water where the Sea Surface Temperatures are near 28˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Tropical Storm Adrian will intensify during the next 36 hours. Adrian could intensify rapidly at times. Tropical Storm Adrian could strengthen to a hurricane on Wednesday.

Tropical Storm Adrian will move around the southern side of a high pressure system that extends from Mexico to over the Eastern North Pacific Ocean. The high pressure system will steer Adrian toward the west during the next 36 hours. On its anticipated track, Tropical Storm Adrian will move farther away from the west coast of Mexico.

Tropical Depression Agatha Drops Heavy Rain on Southern Mexico

Former Hurricane Agatha dropped heavy rain on southern Mexico on Tuesday. Agatha weakened to a tropical depression on Tuesday morning as it moved farther inland over southern Mexico. At 8:00 a.m. EDT on Tuesday the center of Tropical Depression Agatha was located at latitude 17.0°N and longitude 95.3°W which put it about 55 miles (90 km) north of Salina Cruz, Mexico. Agatha was moving toward the northeast at 8 m.p.h. (13 km/h). The maximum sustained wind speed was 35 m.p.h. (55 km/h) and and there were wind gusts to 45 m.p.h. (75 km/h). The minimum surface pressure was 1004 mb.

Tropical Depression Agatha dropped heavy rain on parts of Oaxaca, Chiapas, Veracruz and Tabasco on Tuesday morning. The lower levels of the circulation of former Hurricane Agatha weakened steadily on Tuesday as it moved farther inland over south Mexico. However, the circulation in the middle and upper levels of Agatha remained well organized. Microwave satellite images showed a well defined center of circulation in the middle levels. Bands of strong thunderstorms were present in the eastern half of Tropical Depression Agatha. Those bands were dropping locally heavy rain over parts of southern Mexico. Bands in the western half of Agatha’s circulation consisted primarily of showers and lower clouds.

An upper level trough over northern Mexico will steer the middle and upper parts of Tropical Depression Agatha toward the northeast during the next 36 hours. Bands in the eastern half of Agatha will continue to drop locally heavy rain over southern Mexico, the Yuacatan Peninsula and parts of Honduras. The heavy rain could cause flash floods in some locations. The middle and upper parts of Tropical Depression Agatha could emerge over the Bay of Campeche or Northwestern Caribbean Sea on Wednesday or Thursday. The remnants of Agatha could contribute to the formation of a tropical cyclone or subtropical cyclone later this week.

Hurricane Agatha Makes Landfall Near Puerto Angel, Mexico

Hurricane Agatha made landfall near Puerto Angel, Mexico on Monday afternoon. At 5:00 p.m. EDT on Monday the center of Hurricane Agatha was located at latitude 15.7°N and longitude 96.6°W which put it about 5 miles (10 km) west of Puerto Angel, Mexico. Agatha was moving toward the northeast at 8 m.p.h. (13 km/h). The maximum sustained wind speed was 105 m.p.h. (165 km/h) and and there were wind gusts to 125 m.p.h. (200 km/h). The minimum surface pressure was 974 mb.

A Hurricane Warning was in effect for the portion of the coast from Salina Cruz to Lagunas de Chacahua, Mexico. A Hurricane Watch was in effect for the portion of the coast from Salina Cruz to Barra de Tonala. Tropical Storm Warnings were in effect for the portions of the coast from Lagunas de Chacahua to Punta Maldonado and from Salina Cruz to Boca de Pijijiapan, Mexico.

Hurricane Agatha maintained its intensity until it made landfall on the southern coast of Mexico just to the west of Puerto Angel on Sunday afternoon. A reconnaissance aircraft reported a circular eye with a diameter of 35 miles (55 km) at the center of Hurricane Agatha. The eye was also visible on satellite images. The eye was surrounded by a ring of strong thunderstorms and the strongest winds were occurring in that ring of storms. The ring of thunderstorms was weaker south of the eye. Bands of showers and thunderstorms were revolving around the core of Agatha. Storms near the core generated strong upper level divergence that pumped mass away from the hurricane.

The circulation around Hurricane Agatha increased slightly in size on Sunday. Winds to hurricane force extended out 25 miles (40 km) from the center of Agatha’s circulation. Winds to tropical storm force extended out 90 miles (145 km) from the center of circulation. The Hurricane Intensity Index (HII) for Hurricane Agatha was 17.8. The Hurricane Size Index (HSI) was 8.8 and the Hurricane Wind Intensity Size Index (HWISI) was 26.6.

An upper level trough over northern Mexico will steer Hurricane Agatha toward the northeast during the next 24 hours. On its anticipated track, Hurricane Agatha will move inland over Oaxaca. The center of Agatha could pass northwest of Tehuantepec and Salina Cruz on Monday night. Hurricane Agatha will bring strong winds and locally heavy rain to Oaxaca. Heavy rain is likely to cause flash floods in some locations. Agatha could produce a storm surge of ten feet (three meters) along portions of the coast of Oaxaca. Hurricane Agatha could cause localized serious damage.

The lower part of Hurricane Agatha’s circulation will weaken quickly when it moves over mountains in southern Mexico. The upper level trough over northern Mexico will steer the middle and upper parts of Agatha’s circulation toward the northeast during the next 24 hours. The middle and upper parts of Hurricane Agatha could emerge over the Bay of Campeche or northwest Caribbean Sea in a couple of days. Those parts of Agatha’s circulation could contribute to the development of a tropical or subtropical cyclone over the Gulf of Mexico, northwest Caribbean Sea or western Atlantic Ocean later this week.

Hurricane Agatha Nears Southern Mexico

Hurricane Agatha neared southern Mexico on Monday morning. At 8:00 a.m. EDT on Monday the center of Hurricane Agatha was located at latitude 15.1°N and longitude 97.3°W which put it about 65 miles (105 km) southwest of Puerto Angel, Mexico. Agatha was moving toward the northeast at 6 m.p.h. (10 km/h). The maximum sustained wind speed was 110 m.p.h. (175 km/h) and and there were wind gusts to 130 m.p.h. (210 km/h). The minimum surface pressure was 964 mb.

A Hurricane Warning was in effect for the portion of the coast from Salina Cruz to Lagunas de Chacahua, Mexico. A Hurricane Watch was in effect for the portion of the coast from Salina Cruz to Barra de Tonala. Tropical Storm Warnings were in effect for the portions of the coast from Lagunas de Chacahua to Punta Maldonado and from Salina Cruz to Boca de Pijijiapan, Mexico.

Hurricane Agatha did not change much during Sunday night. A small circular eye was present at the center of Hurricane Agatha. The eye was surrounded by a ring of strong thunderstorms and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were revolving around the core of Hurricane Agatha. Storms near the core generated strong upper level divergence that pumped mass away from the hurricane.

The circulation around Hurricane Agatha was small. Winds to hurricane force extended out 20 miles (30 km) from the center of Agatha’s circulation. Winds to tropical storm force extended out 80 miles (130 km) from the center of circulation. The Hurricane Intensity Index (HII) for Hurricane Agatha was 19.2. The Hurricane Size Index (HSI) was 7.3 and the Hurricane Wind Intensity Size Index (HWISI) was 26.5. The intensity of Hurricane Agatha was the same as the intensity of Hurricane Sally when Sally hit northwest Florida in 2020. Agatha was smaller than Sally was.

Hurricane Agatha will move through an environment favorable for intensification during the next few hours. Agatha will move over water where the Sea Surface Temperatures are near 29˚C. It will move under the center of an upper level ridge over the Eastern North Pacific Ocean. The upper level winds are weak near the center of the ridge and there will be little vertical wind shear. Hurricane Agatha could strengthen a little before it reaches Mexico. An upper level trough over Baja California will approach Agatha as the hurricane makes landfall on the coast of Mexico. The upper level trough will produce westerly winds that will blow toward the top of Agatha’s circulation. Those winds will cause the vertical wind shear to increase. More wind shear will make the environment less favorable for intensification. The circulation around Hurricane Agatha could pull drier air over Mexico into the western part of Agatha. More vertical wind shear and drier air could cause Hurricane Agatha to start to weaken just prior to landfall.

The upper level trough over Baja California will steer Agatha toward the northeast more quickly on Monday. On its anticipated track, Hurricane Agatha will make landfall on the coast of Mexico near Puerto Escondido and Puerto Angel in a few hours. Hurricane Agatha will bring strong winds and locally heavy rain to Oaxaca and Chiapas. Heavy rain is likely to cause flash floods in some locations. Agatha could produce a storm surge of ten feet (three meters) along portions of the coast of Oaxaca. Hurricane Agatha could cause localized serious damage.

Hurricane Agatha Rapidly Intensifies to Cat. 2

Hurricane Agatha rapidly intensified to Category 2 on the Saffir-Simpson Scale over the Eastern North Pacific Ocean south of Mexico on Sunday afternoon. At 5:00 p.m. EDT on Sunday the center of Hurricane Agatha was located at latitude 14.1°N and longitude 98.7°W which put it about 185 miles (290 km) southwest of Puerto Angel, Mexico. Agatha was moving toward the northeast at 1 m.p.h. (2 km/h). The maximum sustained wind speed was 110 m.p.h. (175 km/h) and and there were wind gusts to 130 m.p.h. (210 km/h). The minimum surface pressure was 964 mb.

A Hurricane Warning was in effect for the portion of the coast from Salina Cruz to Lagunas de Chacahua, Mexico. A Hurricane Watch was in effect for the portion of the coast from Salina Cruz to Barra de Tonala. Tropical Storm Warnings were in effect for the portions of the coast from Lagunas de Chacahua to Punta Maldonado and from Salina Cruz to Boca de Pijijiapan, Mexico.

A U.S. Air Force Reserve Hurricane Hunter reconnaissance plane found that Hurricane Agatha had rapidly intensified to a Category 2 hurricane on the Saffir-Simpson Scale on Sunday afternoon. A small circular eye formed at the center of Hurricane Agatha. The eye was surrounded by a ring of strong thunderstorms and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were revolving around the core of Hurricane Agatha. Storms near the core generated strong upper level divergence that pumped mass away from the hurricane.

The circulation around Hurricane Agatha was small. Winds to hurricane force extended out 20 miles (30 km) from the center of Agatha’s circulation. Winds to tropical storm force extended out 115 miles (175 km) from the center of circulation. The Hurricane Intensity Index (HII) for Hurricane Agatha was 19.2. The Hurricane Size Index (HSI) was 7.2 and the Hurricane Wind Intensity Size Index (HWISI) was 26.4.

Hurricane Agatha will move through an environment favorable for intensification during the next 18 hours. Agatha will move over water where the Sea Surface Temperatures are near 30˚C. It will move under the center of an upper level ridge over the Eastern North Pacific Ocean. The upper level winds are weak near the center of the ridge and there will be little vertical wind shear. Hurricane Agatha is likely to intensify during the next 18 hours. An upper level trough over Baja California will approach Hurricane Agatha on Monday. The upper level trough will produce westerly winds that will blow toward the top of Agatha’s circulation. Those winds will cause the vertical wind shear to increase. More wind shear will make the environment less favorable for intensification.

Hurricane Agatha will move around the northwestern part of a high pressure system over Central America and the Eastern North Pacific Ocean. The high pressure system will steer Agatha toward the northeast on Sunday night. The upper level trough over Baja California will steer Agatha toward the northeast more quickly on Monday. On its anticipated track, Hurricane Agatha will move approach the coast of Mexico near Puerto Escondido and Puerto Angel during the middle of Monday. Agatha could be a major hurricane when it nears the coast of Mexico. Hurricane Agatha will bring strong winds and locally heavy rain to Oaxaca. Heavy rain is likely to cause flash floods in some locations. Agatha could produce a storm surge of ten feet (three meters) along portions of the coast of Oaxaca. Hurricane Agatha could cause localized major damage.