Hurricane Amanda On May 16, a
tropical wave emerged into the Eastern Pacific. Moving westward, the wave changed little in organization until May 19, when a broad
surface low formed about south of
Acapulco. The system failed to organize further over the next two days as
thunderstorm activity oscillated as it continued to track westward and eventually west-northwestward. By May 22, however,
scatterometer data began to indicate that the system was becoming better defined, with deep convection persisting near the center, which was getting better organized. The depression gradually organized, with
banding features developing near the center, and eventually was upgraded to a tropical storm on May 23, being assigned the name
Amanda. Steered by a
subtropical ridge over central Mexico, The small eye of the cyclone continued to quickly clear, and Amanda became a major hurricane by 03:00 UTC on May 25, making it the second-earliest such storm within the National Hurricane Center's area of responsibility, only to be surpassed by
Hurricane Bud from
2012. The rapid intensification eventually leveled off with Amanda reaching its peak intensity at 12:00 UTC that day as a high-end Category 4 hurricane on the
Saffir–Simpson scale. Winds were estimated at 155 mph (250 km/h) and the minimum pressure at 932 mbar (hPa; 27.52 inHg). A river near
Coyuca de Benítez overflowed its banks. Three trees were brought down and a vehicle in
Acapulco was destroyed. Statewide, one person was killed when a tree that had fallen on the road resulted in a fatal car wreck. Much of
Michoacán was battered by large waves and heavy rains, resulting in two casualties. Several roads were destroyed in
Zitácuaro. The
2014 15U Baseball World Cup had to be relocated from
La Paz, Baja California Sur to
Sinaloa due to damage caused by the storm.
Tropical Storm Boris The formation of Boris is attributed to a low-level trough that entered the East Pacific from the southwestern Caribbean Sea on May 28. A broad area of low pressure developed in association with the trough south of the Mexico–Guatemala border two days later, and the disturbance steadily organized with aid from an eastward-moving convectively-coupled
kelvin wave. By 18:00 UTC on June 2, the system acquired enough organization to be deemed a tropical depression. Tracking northward, the depression steadily became better defined as spiral bands developed over the eastern semicircle of the circulation. After intensifying into a tropical storm at 12:00 UTC on June 3 and attaining peak winds of six hours later, increasing land interaction caused Boris to begin weakening. It was downgraded to a tropical storm early on June 4 and subsequently degenerated into a remnant low at 18:00 UTC. The remnant low turned northwestward and dissipated shortly thereafter. Posing a considerable rainfall and mudslide threat to
Guatemala, classes were suspended in nine school districts, impacting 1.25 million pupils. Similarly, some classes were suspended in the Mexican states of Chiapas and Oaxaca. In the former, roughly 16,000 people were evacuated out of hazardous areas. Most of the impacts associated with Boris were due to its developing precursor, whose heavy rainfalls caused 20 mudslides, killing five and resulting in extensive property damage. Heavy rainfall in Chiapas caused rivers to overflow their banks, resulting in minor damage. Overall, the effects of Tropical Storm Boris and its precursor killed six people across Central America.
Hurricane Cristina The complex interaction of a tropical wave, disturbance within the
Intertropical Convergence Zone, and convectively-coupled kelvin wave led to the formation of a tropical depression around 12:00 UTC on June 9. Northerly shear limited intensification of the cyclone initially, but it became Tropical Storm Cristina eighteen hours after formation. A relaxation in upper-level winds allowed the system to begin a period of rapid intensification on June 11, and Cristina became both the earliest second hurricane and major hurricane on record at the time before attaining its peak as a Category 4 with winds of around 12:00 UTC on June 12. The combination of an eyewall replacement cycle, cooler waters, and entrainment of dry air caused Cristina to begin weakening shortly after peak; it fell to tropical storm intensity early on June 14 and degenerated to a remnant low by 06:00 UTC the next morning. The low moved erratically within low-level flow and dissipated early on June 19. Under the anticipation of waves, a "yellow" alert was issued for Colima, Guerrero, Oaxaca, and parts of Jalisco and Michoacán. Along Manzanillo, strong waves resulted in minor flooding that damaged one road.
Tropical Storm Douglas A tropical wave emerged off the western coast of Africa on June 17, tracking across the Atlantic Ocean with inappreciable organization throughout the following days. The wave crossed Central America on June 25, where deep convective activity increased. On June 28, the disturbance became distinctively better defined with a well-defined center and spiral banding, signifying the formation of a tropical depression by 18:00 UTC while positioned about south-southwest of Manzanillo, Mexico. Steered west-northwest and eventually northwest under the influence of a mid-level ridge, the broad cyclone slowly intensified into a tropical storm by 00:00 UTC on June 30, attaining peak winds of late the next day. Thereafter, a track over cooler waters and into a drier environment caused the system to begin weakening; at 06:00 UTC on July 5, Douglas degenerated into a non-convective remnant low well west of Baja California. The remnant low turned slowly west-northwest prior to dissipating on July 8.
Tropical Storm Elida A well-defined tropical wave moved emerged off the western coast Africa on June 20. After entering the East Pacific a week later, shower and thunderstorm activity began to increase. Although the system lacked a closed low initially, a small circulation was noted by 06:00 UTC on June 30, and the system was declared Tropical Storm Elida accordingly. Paralleling the southwestern coast of Mexico, the cyclone attained peak winds of before strong northwesterly wind shear from nearby Tropical Storm Douglas caused the storm to become disheveled. It weakened to a tropical depression at 00:00 UTC on July 2 and degenerated into a remnant low six hours later. The remnant low drifted southeastward before dissipating early on July 3.
Tropical Storm Fausto A tropical wave moved off the western coast of Africa on June 22 and entered the East Pacific eight days later. On July 4, convection increased with the aid of a convectively-coupled kelvin wave, and two days later, a broad area of low pressure formed along the wave axis well south-southwest of Baja California. After further organization, the disturbance was declared a tropical depression at 12:00 UTC on July 7. Steered westward around a subtropical ridge, the depression intensified into Tropical Storm Fausto six hours later and simultaneously attained peak winds of . By early on July 9, Fausto weakened to a tropical depression as dry air became entrained into the circulation. The low-level center opened up into a trough by 12:00 UTC, marking the demise of the cyclone.
Tropical Storm Wali On July 13, the NHC began to monitor a large area of disturbed weather centered about west-southwest of the southern tip of the
Baja California peninsula associated with a
tropical wave. The disturbance crossed into the central North Pacific basin three days later, there the deep convection around the center soon began to organize. A tropical depression formed on July 17, and the depression strengthened into Tropical Storm Wali later that day, with amid marginal sea surface temperatures of . The storm attained sustained winds of at 00:00 UTC on July 18, but increasing westerly wind shear stymied further strengthening. Wali's movement was to the northwest, steered by a mid-level ridge to its north and an upper trough west of the main
Hawaiian Islands. Wali weakened to a tropical depression at 18:00 UTC that same day, and degenerated into a remnant low six hours later. After degenerating, the spreading plume of Wali's remnant moisture interacted with an unstable air mass beneath the eastern flank of a separate upper trough over the Hawaiian Islands on July 19–20, triggering thunderstorms across the island of Hawaii and then significant rainfall on
Oahu. Rainfall totals on Oahu mostly ranged from to , though multiple sites along the windward slopes of the
Koolau Range received more, with several receiving over per hour. The rain gage at
Kahana Bay Beach showed that fell in a 12 hours. Heavy rainfall also affected
Molokai and
Maui. Property damage from the storm was reported on Oahu There were no fatalities due to the flooding; however, one fatality related to the rain event was reported when a swimmer drowned in rough seas in
Maalaea Bay, near
Molokini.
Hurricane Hernan A tropical wave moved off the western coast of Africa on July 12 and reached the East Pacific by July 21. Initially devoid of convection, shower and thunderstorm activity increased significantly a few days later, possibly due to the passage of a convectively-coupled kelvin wave. Following the development of a closed area of low pressure, the disturbance was designated as a tropical depression at 06:00 UTC on July 26 while located about southwest of Zihuatanejo, Mexico; twelve hours later, it was upgraded to Tropical Storm Hernan. Influenced by a mid-level ridge over the southern United States and Mexico, the cyclone moved west-northwest to northwest while quickly strengthening. At 18:00 UTC on July 27, Hernan intensified into a Category 1 hurricane and simultaneously attained peak winds of . Thereafter, increasing westerly shear and cooling ocean temperatures caused the storm to begin weakening. Hernan was downgraded to a tropical storm at 06:00 UTC on July 28 and degenerated into a remnant low at 12:00 UTC the following day. The remnant low slowed and turned west prior to dissipating early on July 31.
Hurricane Iselle A tropical wave emerged from Africa on July 14, eventually organizing into a tropical depression over the eastern Pacific around 12:00 UTC on July 31; six hours later, it strengthened into Tropical Storm Iselle. A mid-level ridge over Mexico directed the system west-northwest, while improving upper-level winds allowed Iselle to begin rapid intensification. Iselle reached hurricane intensity around 00:00 UTC on August 2 and major hurricane strength by 12:00 UTC the next day. As the hurricane moved parallel to the 26 °C isotherm, its cloud pattern evolved to resemble an annular hurricane, with a large eye and lack of convective bands. It intensified into a Category 4 hurricane early on August 4 and attained peak winds of around 18:00 UTC that day. Increased wind shear prompted a weakening trend as the system entered the central Pacific, and it weakened to a tropical storm by 06:00 UTC on August 8 before making landfall just east of Pahala, Hawaii, with winds of six hours later. The high terrain of Hawaii contributed to the disruption of Iselle's cloud pattern, and it degenerated to a remnant low by 06:00 UTC on August 9 before dissipating west of the island late the next day.
Hurricane Julio Julio originated from a tropical wave that moved off Africa on July 20, ultimately organizing into a tropical depression well southwest of Baja California by 00:00 UTC on August 4. After intensifying into a tropical storm six hours later, it tracked west-northwest. Light northeasterly wind shear allowed the cyclone to reach hurricane strength around 06:00 UTC on August 6 and further organize to its peak as a Category 3 with winds of two days later, despite cool ocean temperatures. Shortly after entering the central Pacific, Julio began to weaken as a result of cold water upwelling. Although the cyclone fell to a tropical storm early on August 12, an upper-level environment still favorable for strengthening allowed Julio to briefly regain hurricane strength the next day. Julio fell below hurricane strength once again early on August 14 as southwesterly wind shear increased, weakened to a tropical depression early on August 15, and degenerated to a remnant low around 18:00 UTC that day. The low dissipated over the far northern Pacific on August 18.
Hurricane Karina A tropical wave left Africa on July 28, crossing Central America to become a tropical depression by 00:00 UTC on August 12. The newly formed system strengthened as it moved west-northwest, becoming Tropical Storm Karina around 12:00 UTC the next morning, and further intensifying to a hurricane by 18:00 UTC on August 14. Increasingly easterly shear eroded the hurricane's inner core, and Karina dramatically weakened as a result. By August 19, as it remained disorganized, a large ridge to its north diminished and a sprawling tropical cyclone—Lowell—formed to its east, leading to weak steering currents that allowed Karina to meander. It executed a three-day-long cyclonic loop, while environmental conditions began to improve, and became a hurricane again by 18:00 UTC on August 22; twelve hours later, Karina reached peak winds of . Lower ocean temperatures and increasing shear soon deteriorated the storm's cloud pattern, and it fell below hurricane strength early on August 24. Lacking persistent convection, Karina degenerated to a remnant area of low pressure by 18:00 UTC on August 26. The remnant low moved around the southern portion of nearby Hurricane Marie and dissipated early on August 28.
Hurricane Lowell A tropical wave departed Africa on August 1, crossing Central America to become a tropical depression around 12:00 UTC on August 17. With a circulation about across, the unusually large system only slowly organized, becoming Tropical Storm Lowell around 18:00 UTC on August 18. Strong upper-level winds that had been plaguing the system weakened as it moved west then northwest, and its large circulation contracted, allowing Lowell to attain hurricane strength with peak winds of by 12:00 UTC on August 21 as a large eye became evident. Low wind shear allowed Lowell to only slowly decrease in intensity over the coming days despite cooling ocean temperatures. It became a tropical depression early on August 24 and degenerated to a remnant low around 12:00 UTC that morning. The post-tropical cyclone turned west and remained distinct until late on August 28, when it dissipated into an open trough well northeast of Hawaii.
Hurricane Marie A tropical wave crossed the coast of Africa on August 10, developing into a tropical depression over the East Pacific around 00:00 UTC on August 22. Embedded in a very favorable environment, the system intensified into Tropical Storm Marie six hours later, part of a larger 66-hour period of rapid intensification that ultimately brought the storm to its peak as a Category 5 hurricane with winds of around 18:00 UTC on August 24. An eyewall replacement cycle later that day curbed the strengthening trend, and by August 26, a persistent ridge over the southern United States directed Marie into cooler ocean waters; both of these events caused steady to rapid weakening. Marie weakened to a tropical storm around 18:00 UTC on August 27 and degenerated to a remnant low a day later. The low turned west and eventually dissipated, early on September 2.
Hurricane Norbert A tropical wave departed Africa on August 18 and reached the East Pacific nearly two weeks later, where it steadily organized into Tropical Storm Norbert around 12:00 UTC on September 2. Departure from the ITCZ resulted in the system moving north initially, but a series of ridges over Mexico directed it on a west to northwest track for the remainder of its duration. Over anomalously warm ocean waters, and part of an increasingly favorable shear regime, Norbert intensified into a hurricane by 00:00 UTC on September 4. After levelling off in intensity the next day, the system quickly strengthened to its peak as a Category 3 hurricane with winds of around 06:00 UTC on September 6. Norbert passed west of Baja California and entered a drier environment, causing a rapid decay that caused it to degenerate to a remnant low by 00:00 UTC on September 7. The low meandered offshore before dissipating early on September 11.
Hurricane Odile The most destructive hurricane of the 2014 season began as a tropical depression around 00:00 UTC on September 10 from a tropical wave that first left Africa on August 28. Situated between two mid-level ridges, the system moved northwest while steadily intensifying, becoming Tropical Storm Odile six hours after formation and further strengthening into a hurricane by 06:00 UTC on September 13. A period of rapid intensification began at that time, with Odile's winds increasing from to a peak of within a 24-hour timeframe. The onset of an eyewall replacement cycle caused the hurricane to weaken slightly on September 14, but Odile still maintained winds of when it made landfall near Cabo San Lucas at 04:45 UTC. It continued up the spine of Baja California before curving northeast into the
Gulf of California, ultimately making a second landfall near Alvaro Obregón, Mexico as a minimal tropical storm on September 17. Odile progressed inland and quickly dissipated over the mountainous terrain of Mexico by 06:00 UTC the next day.
Tropical Depression Sixteen-E A tropical wave that cannot be traced back to Africa was first noted over the central Atlantic on August 29. It entered the East Pacific four days later, where an increase in organization led to the development of a tropical depression well southwest of Baja California around 06:00 UTC on September 11. A mid-level ridge to its east directed the newly formed system northwest to north initially, but as this ridge gradually dissipated, nearby Hurricane Odile became the dominant steering mechanism and forced the depression generally east. In close proximity to Odile, the depression was heavily sheared and thus failed to intensify into a tropical storm. It instead degenerated to a remnant low around 06:00 UTC on September 15 before weakening to an open trough the next morning.
Hurricane Polo The interaction of a westward-tracking tropical wave that emerged off the coast of Africa on September 4, an eastward-tracking kelvin wave, and an elongated surface trough led to the formation of Tropical Storm Polo by 00:00 UTC on September 16 about south of Puerto Escondido, Mexico. Tracking northwest within an environment conducive for strengthening, Polo intensified into a Category 1 hurricane and reached peak winds of by 00:00 UTC on September 18 as an eye became evident on satellite imagery. A sharp increase in wind shear quickly thereafter caused the storm's center to become exposed, and a reconnaissance mission indicated that Polo weakened to a tropical storm by 18:00 UTC that day. After maintaining intensity for about a day, the cyclone weakened to a tropical depression by 06:00 UTC on September 22 and further decreased into a remnant low six hours later. The low turned southwestward before dissipating well southwest of the southern tip of Baja California on September 26. At 15:00 UTC on September 16, a
tropical storm watch was issued for the coast of Southwestern
Mexico from
Zihuatanejo,
Guerrero to
Cabo Corrientes,
Jalisco. Just 24 hours later, a tropical storm warning was put in effect Punta San Telmo, Michoacán to Playa Perula, Jalisco. One tourist perished and three others, including two fisherman, went missing in
Guerrero. A total of 190 restaurants and 20 shops were damaged. Damage in the state totalled at about 100 million pesos (US$7.6 million).
Hurricane Rachel A vigorous tropical wave moved off Africa on September 7, aiding in the formation of Hurricane Edouard before entering the East Pacific on September 19. There, it interacted with pre-existing southwesterly flow, eventually leading to the formation of a tropical depression around 18:00 UTC on September 23. Moderate northeast wind shear prevented the west-northwest-moving depression from becoming Tropical Storm Rachel until 00:00 UTC on September 25. The next day, Rachel's original center dissipated and a new one formed under deep convection. Environmental conditions became more favorable on September 27, when the cyclone reached hurricane strength at 18:00 UTC. It attained peak winds of six hours later before dry air, wind shear, and cooler waters caused a quick decay as the storm moved north. Rachel fell below hurricane strength around 06:00 UTC on September 29 and degenerated to a remnant low by 12:00 UTC the next morning. It dissipated early on October 3.
Hurricane Simon A tropical wave departed Africa on September 14 and continued into the eastern Pacific ten days later, where it interacted with the ITCZ and produced a large area of convection. An area of low pressure developed within this convection and organized while moving west-northwest, becoming a tropical depression by 18:00 UTC on October 1 and intensifying into Tropical Storm Simon twelve hours later. Simon only slowly strengthened initially, limited by its broad size. However, beginning around 18:00 UTC on October 3, it began a 30-hour period of rapid intensification wherein maximum winds increased from , a Category 4 hurricane. The system turned northwest around the periphery of a ridge, tracking into a region of low
ocean heat content that prompted cold water upwelling. Simon rapidly weakened to a tropical storm early on October 6 before gradually degenerating to a remnant area of low pressure around 00:00 UTC on October 8. The post-tropical cyclone turned east and moved ashore Baja California Sur several hours later before dissipating over rugged terrain by 06:00 UTC the next day.
Hurricane Ana In mid-October 2014, disorganized but deep
convection persisted in the Central Pacific at low latitudes. By October 12, the CPHC noted the potential for
tropical cyclogenesis in the vicinity of the convection. Over the next day, rapid organization occurred as an area of low pressure formed and convection became significantly better organized. Based on this, advisories were issued on Tropical Depression Two-C at 21:00 UTC. Further organization continued within the system and the cyclone was eventually upgraded to Tropical Storm Ana by the next day. A
cold front that had been passing through the Central Pacific had begun to weaken a
subtropical ridge to Ana's north, which allowed it to gain
latitude as it moved west due to deep steering flow. Under a favorable environment with above-normal
sea surface temperatures, Ana gradually intensified as it tracked northwest towards Hawaii, eventually become a hurricane by 21:00 UTC on October 17, shortly before reaching peak intensity nine hours later at 06:00 UTC on October 18 about southwest of the
Big Island. Ana began to curve westwards, and weakening began to ensue shortly afterwards, and fell below hurricane intensity by 06:00 UTC on October 20. Ana continued to track westwards away from the Hawaiian islands, until it reached the western periphery of the subtropical ridge and as a cold front began to extend towards it. At this point, Ana had weakened to a minimal tropical storm. As it turned northeast, warm sea surface temperatures caused Ana to rapidly reorganize and strengthen, and by 03:00 UTC on October 25, Ana became a hurricane again, with a cloud-filled
eye developing aside other structural improvements. As it accelerated northeast at speeds of , Ana succumbed to the
wind shear and weakened again to a tropical storm. By 15:00 UTC on October 26, Ana had transitioned into an
extratropical cyclone. According to the CPHC, this made Ana the longest-lived and longest-tracked tropical cyclone that stayed entirely within the Central Pacific basin. Ana's extratropical remnant continued to race northeastward across the Pacific Ocean, before making landfall in
British Columbia, dissipating afterward on October 28. Beginning on October 15, various
tropical cyclone warnings and watches were issued for Hawaii, starting with a tropical storm watch for the Big Island. Three days later, a tropical storm warning was issued for
Kauaʻi and
Niʻihau, and was extended to include portions of the
Papahānaumokuākea Marine National Monument. The threat of the storm forced parks and beaches to close in the state. While passing south of Hawaii, Ana produced heavy rainfall on most of the islands, peaking at at Keaumo on the Big Island. The rains caused the
Sand Island water treatment plant in Honolulu to overflow, which sent about 5,000 gallons of partially treated wastewater into
Honolulu Harbor. Although no real-time wind reports of damage from Ana was reported on the Big Island, a post-storm report in November 2014 by resident Keith Robinson reported that there was damage in the southern vicinity of Niʻihau. He reported extensive
vegetation damage as well as tree tops levelled at "an estimated
Beaufort Wind Scale range of ". Although it was not officially verified, the CPHC decided to treat the report as part of the conditions experienced in the area that was under a tropical storm warning. In preparation for the cyclone, various tropical cyclone watches and warnings were issued for the coastline of southeastern Mexico. however, following Trudy's period of rapid intensification, this was abruptly upgraded to a "red" alert for southeastern portions of the state as well as southwestern Oaxaca, and the remainder of the two states were placed under an "orange" alert. Upon making landfall, torrential rainfall associated with the cyclone caused numerous landslides and flooding. Approximately 4,075 people were evacuated from the most-at-risk locations. A total of 5,000 homes were affected by the storm, 218 of which damaged and an additional six completely destroyed. At the height of the storm, more than 20,000 households were without electricity. A state of emergency was declared for 35 municipalities across Guerrero and 100 municipalities in Oaxaca. Overall, Trudy was responsible for nine deaths: eight in Guerrero and one in Campeche.
Hurricane Vance A trough that extended from the Atlantic's Tropical Storm Hanna into the eastern Pacific led to widespread convection south of the Gulf of Tehuantepec in late October. This disturbance remained disorganized until 06:00 UTC on October 30, when a well-defined center and organized thunderstorm activity led to the formation of a tropical depression. The cyclone intensified into Tropical Storm Vance twelve hours later but ultimately weakened some due to the entrainment of dry air. After drifting for a day, mid-level ridging over the far eastern Pacific caused the storm to move west-northwest. Improving environmental conditions allowed it to become a hurricane around 12:00 UTC on November 2 and rapidly strengthen to a Category 2 with winds of the next day. Vance curved northeast into a higher shear environment by November 4, causing the system to weaken from a Category 2 hurricane to a tropical depression in an 18-hour period. The depression opened up into a trough around 12:00 UTC on November 5 and moved ashore Sinaloa and Nayarit several hours later before dissipating. Heavy rains from the remnants of Vance, lasting 40 hours in some places, Flooding up to in depth affected ten homes in
San Dimas. Thirty families in the area were evacuated due to the rising water. A few landslides were reported in the region, though no major damage resulted. ==Storm names==