The 1999 Atlantic hurricane season was a fairly active season, mostly due to a persistent La Niña that developed in the latter half of 1998. It had five Category 4 hurricanes – the highest number recorded in a single season in the Atlantic basin, previously tied in 1933 and 1961, and later tied in 2005 and 2020. The season officially began on June 1, and ended on November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. The first storm, Arlene, formed on June 11 to the southeast of Bermuda. It meandered slowly for a week and caused no impact on land. Other tropical cyclones that did not affect land were Hurricane Cindy, Tropical Storm Emily, and Tropical Depression Twelve. Localized or otherwise minor damage occurred from Hurricanes Bret, Gert, and Jose, and tropical storms Harvey and Katrina.
The 2008 Pacific hurricane season was a near-average Pacific hurricane season which featured seventeen named storms, though most were rather weak and short-lived. Only seven storms became hurricanes, of which two intensified into major hurricanes. This season was also the first since 1996 to have no cyclones cross into the central Pacific. The season officially began on May 15 in the eastern Pacific and on June 1 in the central Pacific. It ended in both regions on November 30. These dates, adopted by convention, historically describe the period in each year when most tropical cyclone formation occurs in these regions of the Pacific. This season, the first system, Tropical Storm Alma, formed on May 29, and the last, Tropical Storm Polo, dissipated on November 5.
The 2010 Pacific hurricane season was the least active Pacific hurricane season on record, tied with 1977. The season accumulated the second-fewest ACE units on record, as many of the tropical cyclones were weak and short-lived. Altogether, only three of the season's eight named storms strengthen into hurricanes. Of those, two became major hurricanes, with one, Celia, reaching Category 5 intensity on the Saffir-Simpson scale. Despite the inactivity, however, it was the costliest Pacific hurricane season on record at the time, mostly due to Tropical Storm Agatha. The season officially began on May 15 in the eastern North Pacific and on June 1 in the central North Pacific. It ended in both regions on November 30. These dates, adopted by convention, historically describe the period in each year when most tropical cyclogenesis occurs in these regions of the Pacific. However, the formation of tropical cyclones is possible at any time of the year, as evidenced by the formation of Tropical Storm Omeka on December 19.
The 2011 Pacific hurricane season was a below average season in terms of named storms, although it had an above average number of hurricanes and major hurricanes. During the season, 13 tropical depressions formed along with 11 tropical storms, 10 hurricanes and 6 major hurricanes. The season officially began on May 15 in the East Pacific Ocean, and on June 1 in the Central Pacific; they both ended on November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the Pacific basin. The season's first cyclone, Hurricane Adrian formed on June 7, and the last, Hurricane Kenneth, dissipated on November 25.
The 2012 Pacific hurricane season was a moderately active Pacific hurricane season that saw an unusually high number of tropical cyclones pass west of the Baja California Peninsula. The season officially began on May 15 in the eastern Pacific Ocean, and on June 1 in the central Pacific (from 140°W to the International Date Line, north of the equator; they both ended on November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in these regions of the Pacific Ocean. However, the formation of tropical cyclones is possible at any time of the year. This season's first system, Tropical Storm Aletta, formed on May 14, and the last, Tropical Storm Rosa, dissipated on November 3.
The 2009 Pacific hurricane season was the most active Pacific hurricane season since 1997. The season officially started on May 15 in the East Pacific Ocean, and on June 1 in the Central Pacific; they both ended on November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the Eastern Pacific tropical cyclone basin; however, tropical cyclone formation is possible at any time of the year. The first system of the season, Tropical Depression One-E, developed on June 18, and the last, Hurricane Neki, dissipated on October 27, keeping activity well within the bounds of the season.
Hurricane Andres was the first named storm and hurricane of the 2009 Pacific hurricane season. Forming on June 21, Andres gradually intensified as it tracked along the Mexican coastline. Deep convection developed around the center of circulation and by June 23, the storm attained hurricane-status, peaking with winds of 80 mph (130 km/h). Upon attaining this intensity, the storm featured a developing eyewall within a central dense overcast. Within 36 hours, the storm rapidly degenerated, having most of the convection being displaced by high wind shear, becoming a non-tropical trough during the afternoon of June 24.
The 2013 Pacific hurricane season was an above average Pacific hurricane season with 21 tropical cyclones forming. Of these, 20 became named storms – 18 in the Eastern Pacific basin, and 2 in the Central Pacific basin. Of the 18 named storms in the east, 9 became hurricanes, with one, Raymond, becoming the season's only major hurricane. In the central, neither named storm became a hurricane. It was also a below-normal season in terms of Accumulated cyclone energy (ACE), as many of its systems were weak and short-lived. The season officially began on May 15 in the Eastern Pacific and started on June 1 in the Central Pacific; both ended on November 30. These dates conventionally delimit the period of each year when most tropical development occurs in these North Pacific basins. The first cyclone, Tropical Storm Alvin, formed on May 15, and the last, Tropical Storm Sonia, dissipated on November 4.
The 2014 Pacific hurricane season was the fifth-busiest season since reliable records began in 1949, alongside the 2016 season. The season officially started on May 15 in the East Pacific Ocean, and on June 1 in the Central Pacific; they both ended on November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the Pacific basin.
Tropical Storm Hermine was a near-hurricane strength tropical cyclone that brought widespread flooding from Guatemala northwards to Oklahoma in early September 2010. Though it was named in the western Gulf of Mexico, Hermine developed directly from the remnant low-pressure area associated with the short-lived Tropical Depression Eleven-E in the East Pacific. Throughout its lifespan, the storm caused 52 direct deaths and roughly US$740 million in damage to crops and infrastructure, primarily in Guatemala. The precursor tropical depression formed on September 3 in the Gulf of Tehuantepec and neared tropical storm intensity before making landfall near Salina Cruz, Mexico, on the next day. Though the depression quickly weakened to a remnant low, the disturbance crossed the Isthmus of Tehuantepec and tracked north into the warm waters of the Gulf of Mexico, where it reorganized into a tropical cyclone once again on September 5. There, the system quickly strengthened into a tropical storm and received the name Hermine before moving ashore near Matamoros, Mexico on September 7 as a high-end tropical storm. Over the next few days, Hermine weakened as it moved over the U.S. Southern Plains, eventually dissipating over Kansas on September 10.
Tropical Storm Georgette was a short-lived tropical storm that struck Baja California Sur in September 2010. Georgette originated from an area of disturbed weather over the eastern Pacific ocean on September 20. The next day, the system was upgraded into a tropical storm a short distance south of Baja California Sur. As the storm moved over the peninsula, it weakened to a tropical depression. It continued north and as such made landfall on mainland Mexico on September 22. Georgette dissipated early the next day while located inland over Sonora. Although officials noted the threat for heavy rainfall across northwest Mexico and Baja California, damage was minimal and no deaths were reported in the country. However, remnant moisture moved into New Mexico, producing flooding that killed one person.
Hurricane Otto produced days of torrential rain over much of the northeastern Caribbean in October 2010. Otto originated as a subtropical cyclone lingering north of Puerto Rico on October 6, and transitioned into a tropical storm the next day, the fifteenth of the 2010 hurricane season. Accelerating toward the northeast, Otto strengthened into a Category 1 hurricane on the Saffir–Simpson scale on October 8, attaining peak winds of 85 mph (140 km/h). The storm began weakening due to incompatible surroundings and became extratropical west of the Azores on October 10. Otto was the first Atlantic tropical cyclone to transition from a subtropical storm since Tropical Storm Laura in 2008.
Hurricane Beatriz was a Category 1 hurricane that killed four people after brushing the western coast of Mexico in June 2011. The second named storm and hurricane of the 2011 Pacific hurricane season, Beatriz originated from an area of disturbed weather on June 19, several hundred miles south of Mexico, and gradually intensified. Gaining latitude, the system became increasingly organized and reached hurricane status on the evening of June 20. The following morning, Beatriz attained winds of 90 mph (150 km/h) as it passed roughly 15 mi (20 km) of Mexico. Due to its interaction with land, the hurricane abruptly weakened hours later. Early on June 22, Beatriz dissipated over open waters. Prior to Beatriz's arrival in Mexico, hurricane watches and warnings were issued for coastal areas. Hundreds of shelters opened across the states of Colima and Guerrero. Heavy rains from the storm triggered significant flooding along the Sabana River in Acapulco, killing four people. However, the overall effects of Beatriz were limited and the rains were largely beneficial in mitigating a severe drought.
Hurricane Adrian was an intense, albeit short-lived early-season Category 4 hurricane that brought heavy rainfall and high waves to Mexico in June 2011 during the 2011 Pacific hurricane season. Adrian originated from an area of disturbed weather which had developed during the course of early June, off the Pacific coast of Mexico. On June 7, it acquired a sufficiently organized structure with deep convection to be classified as a tropical cyclone, and the National Hurricane Center (NHC) designated it as Tropical Depression One-E, the first one of 2011. It further strengthened to be upgraded into a tropical storm later that day. Adrian moved rather slowly; briefly recurving northward after being caught in the steering winds. After steady intensification, it was upgraded into a hurricane on June 9. The storm subsequently entered a phase of rapid intensification, developing a distinct eye with good outflow in all quadrants. Followed by this period of rapid intensification, it obtained sustained winds fast enough to be considered a major hurricane and reached its peak intensity as a category 4 hurricane that evening.
Hurricane Paul was a strong tropical cyclone that threatened the Baja California peninsula during October 2012. The sixteenth tropical cyclone, tenth hurricane, and fifth major hurricane of the season, Paul originated from a trough of low pressure west of the coastline of Mexico on October 13. While turning towards the north, the system quickly organized, reaching hurricane status in the morning of October 15. By that afternoon, Paul had reached its peak intensity as a Category 3 hurricane on the Saffir-Simpson hurricane wind scale (SSHWS) with maximum sustained winds of 120 mph (195 km/h), but began to weaken rapidly thereafter due to land interaction and strong wind shear. Late on October 17, Paul degenerated into a remnant low. The remnants of Paul later moved ashore along the central Baja California Peninsula, before dissipating on October 18.
Tropical Storm Barry was a weak and short-lived tropical cyclone that brought heavy rains to parts of Central America and Mexico in June 2013. Barry originated from a tropical wave that developed in the southern Caribbean Sea. The wave tracked northwestward and began to develop in marginally favorable conditions. On June 17, the disturbance was upgraded to Tropical Depression Two by the National Hurricane Center. Due to its close proximity to land, the system failed to intensify before crossing the southern Yucatán Peninsula. The depression emerged over the Bay of Campeche late on June 18 and became increasingly organized. During the afternoon of June 19, data from Hurricane Hunters revealed the system had intensified into a tropical storm. The newly named Barry attained peak winds of 45 mph (75 km/h) before making landfall in Veracruz, Mexico on June 20. Once onshore, the storm quickly weakened and degenerated into a remnant low that night.
Hurricane Raymond was a category 3 major hurricane which briefly threatened the southwestern coast of Mexico before recurving back out to sea. The seventeenth named storm, eighth hurricane, and only major hurricane of the 2013 Pacific hurricane season, Raymond developed from a tropical wave on October 20 south of Acapulco, Mexico. Within favorable conditions for tropical cyclogenesis, Raymond quickly intensified, attaining tropical storm intensity and later hurricane intensity within a day of cyclogenesis. On October 21, the hurricane reached its peak intensity with winds of 125 mph (205 km/h). A blocking ridge forced the hurricane to the southwest, while at the same time Raymond began to quickly weaken due to wind shear. The following day, the tropical cyclone weakened to tropical storm status. After tracking westward, Raymond reentered more favorable conditions, allowing it to intensify back to hurricane strength on October 27 while curving northward. The hurricane reached a secondary peak intensity with winds of 105 mph (165 km/h) several hours later. Deteriorating atmospheric conditions resulted in Raymond weakening for a final time, and on October 30, the National Hurricane Center (NHC) declared the tropical cyclone to have dissipated.
Hurricane Cosme caused flooding along the Pacific coast of Mexico in June 2013. The third named tropical cyclone of the 2013 Pacific hurricane season, the storm system formed from a tropical wave south of Manzanillo, Colima, on June 23. The cyclone intensified into a tropical storm on June 24, and soon after strengthened into a hurricane on June 25. Early the following day, Cosme attained its peak intensity as a Category 1 hurricane on the Saffir–Simpson scale with maximum sustained winds of 85 mph (140 km/h) and a minimum barometric pressure of 980 mbar. However, Cosme then began to encounter stable air and lower sea surface temperatures, causing the system to weaken to a tropical storm late on June 26. The system continued to weaken and degenerated into a remnant low pressure surface trough about 690 mi (1,110 km) west-southwest of Cabo San Lucas, Mexico, on June 27. The remnants persisted until dissipating well east-southeast of the Hawaiian Islands on July 1.
Tropical Storm Boris was a weak and short-lived tropical cyclone that brought rainfall to the Isthmus of Tehuantepec and surrounding areas in June 2014. The second named storm of the season, Boris developed from the interaction of a low-level trough and a Kelvin wave south of Mexico late on June 2. Initially a tropical depression, the system moved generally northward and strengthened into Tropical Storm Boris by midday on June 3. About six hours later, Boris peaked with maximum sustained winds of 45 mph (75 km/h) – indicative of a weak tropical storm. By early on June 4, interaction with land caused the storm to weaken, deteriorating to a tropical depression. Later that day, Boris degenerated into a remnant low pressure, before fully dissipating over the Gulf of Tehuantepec on June 5.
Hurricane Marie is tied as the seventh-most intense Pacific hurricane on record, attaining a barometric pressure of 918 mbar in August 2014. The fourteenth named storm, ninth hurricane, and sixth major hurricane of the season, Marie began as a tropical wave that emerged off the west coast of Africa over the Atlantic Ocean on August 10. Some organization of shower and thunderstorm activity initially took place, but dry air soon impinged upon the system and imparted weakening. The wave tracked westward across the Atlantic and Caribbean for several days. On August 19, an area of low pressure consolidated within the wave west of Central America. With favorable atmospheric conditions, convective activity and banding features increased around the system and by August 22, the system acquired enough organization to be classified as Tropical Depression Thirteen-E while situated about 370 mi (595 km) south-southeast of Acapulco, Mexico. Development was initially fast-paced, as the depression acquired tropical storm-force winds within six hours of formation and hurricane-force by August 23. However, due to some vertical wind shear its intensification rate stalled, and for a time it remained a Category 1 hurricane on the Saffir–Simpson hurricane wind scale.
