Meteorological history | |
---|---|
Formed | September 17,2019 |
Remnant low | September 22,2019 |
Dissipated | September 24,2019 |
Category 1 hurricane | |
1-minute sustained (SSHWS/NWS) | |
Highest winds | 85 mph (140 km/h) |
Lowest pressure | 985 mbar (hPa);29.09 inHg |
Overall effects | |
Fatalities | 1 total |
Damage | $50 million |
Areas affected | Guerrero,Michoacán,Jalisco,Colima,Sonora,Baja California Peninsula,Arizona |
IBTrACS / [1] | |
Part of the 2019 Pacific hurricane season |
Hurricane Lorena was a strong Pacific hurricane in September 2019 that brought heavy rainfall,flooding,and mudslides to Southwestern Mexico and the Baja California Peninsula and also brought severe weather to the U.S. state of Arizona. Lorena was the thirteenth named storm and seventh and final hurricane of the 2019 Pacific hurricane season. A tropical wave,originally from the North Atlantic,entered the East Pacific basin on September 16. With increasing thunderstorm development,Lorena formed as a tropical storm on September 17 alongside Tropical Storm Mario. Lorena made its passage northwestward and quickly gained strength before it made landfall as a Category 1 hurricane in Jalisco on September 19. Due to interaction with the mountainous terrain,Lorena weakened back to a tropical storm. After moving into the warm ocean temperatures of the Gulf of California,however,Lorena re-strengthened into a hurricane,and reached its peak intensity with 1-minute sustained winds of 85 mph (137 km/h) and a minimum barometric pressure of 985 millibars (29.1 inHg) Lorena made a second landfall in the Mexican state of Baja California Sur,and quickly weakened thereafter. Lorena weakened to a tropical storm over the Gulf of California,and became a remnant low on September 22,shortly after making landfall in Sonora as a tropical depression. The remnant low moved inland over Mexico,and eventually dissipated inland over Arizona on September 24.
In preparation for the hurricane,hurricane warnings and watches were issued for most of the southwestern coast of Mexico on September 19 whilst hundreds of people were evacuated. Torrential rainfall brought in the states of Colima and Jalisco damaged thousands of hectares worth of crops and damaged at least 201 homes on the coastline. Damage in the agricultural sector between both states was substantial,causing the price of banana crops to rise in the state of Colima. Floods from rivers swelling in Colima blocked roads while landslides occurred across both states. On the Baja California Peninsula,dangerous surf caused a man to die attempting to save his child after being pulled out to sea. In addition,schools were entirely shut down for 506,000 students. 787 people were evacuated from the Eastern coastline of the peninsula to 17 temporary sheltering facilities,while numerous flights in and out of Baja California Sur were cancelled. After weakening in the Gulf of California and leaving 2 fishermen missing,Lorena moved inland into mainland Mexico and eventually the United States. Lorena's remnant low spawned 3 tornadoes in Arizona and caused very high rainfall totals for the region with over half a foot in some areas. Damage from Lorena totaled $50 million (2019 USD) or greater,counting agricultural losses in Mexico and further damage caused in the U.S. [2]
The origins of Lorena can first be traced back to a tropical wave which emerged off the coast of Western Africa on September 4, 2019. [1] At the time, the wave had two distinctive areas of cyclonic rotation, but both eventually merged just east of the Lesser Antilles. [1] At 15:00 UTC on September 11, the National Hurricane Center (NHC) noted the possibility of a low-pressure region forming within the wave off of the Central American coast. [3] Despite not having a well-defined center, the disturbance was already producing tropical-storm-force winds by late September 16, as it emerged into the Eastern Pacific basin. [1] By 06:00 UTC on September 17, the disturbance had improved in overall organization, with the formation of an identifiable low-level center and bursts of convective cloud tops, and was named Tropical Storm Lorena by the NHC, becoming the thirteenth named storm of the season. [1] [4] [5] Lorena began quickly strengthening, gradually moving northwestward towards the coast of Mexico. [1] At 00:00 UTC on September 19, Lorena reached its initial peak intensity as a Category 1 hurricane, the seventh hurricane of the annual season, with 1-minute sustained winds of 80 mph (130 km/h), only miles away from the coast of Jalisco. [1] [6] After slightly weakening, Lorena made its first landfall in Chamela-Cuixmala only 6 hours afterwards. [1]
Interaction with land caused Lorena to weaken below hurricane status by 15:00 UTC on September 19. [7] [8] Lorena drifted close to the coastline of Manzillo, Colima as a tropical storm for several hours. [1] Because the storm emerged over the typically warm sea-surface temperatures of the Gulf of California, Lorena regained hurricane status and peaked with 1-minute sustained winds of 85 mph (137 km/h) and a pressure of 985 mbar (29.1 inHg) by 18:00 UTC on September 20. [1] At the time, an eye had begun to emerge 35 miles (56 km) east of Cabo San Lucas. [1] Lorena slowed to a crawl paralleling the coast of the Baja California Peninsula, but eventually made landfall near La Ventana at 03:00 UTC on 21 September, whilse slightly weakening below its peak strength. [1] By midday on September 21, Lorena's structure began to quickly deteriorate, as its convection weakened. [9] Due to increasing wind shear and weakening caused by its proximity to the mountainous terrain of Baja California, Lorena degenerated into a tropical depression by mid-morning on September 22 in the northern Gulf of California, later becoming a remnant low by that evening just following its final landfall in Sonora. [1] [10] The remnant low drifted northward and entirely dissipated inland over the U.S. state of Arizona on September 24. [1]
Tropical storm watches were issued from Zihuatanejo in Guerrero to Cabo Corrientes in Jalisco on September 17 by the Mexican government, and were later upgraded to tropical storm warnings. [1] Hurricane warnings were also issued for Manzanillo, Colima to Cabo Corrientes on September 19. [1] During this time, Lorena was moving very close to the shorelines of the states of Colima and Jalisco, and at its first peak in strength. [11] Red alerts, the highest level of danger alert, were issued statewide in Jalisco, [12] and at least 240 people there were evacuated prior to the storm. [13] Schools were shut down across most of the state due to the impending hurricane. [14] Flooded streets, washed-out roads, landslides in 10 municipalities, and dozens of downed trees were reported. [15] Power was knocked out in some areas. Floods up to 3 ft (0.91 m) high affected the town of Chamela in Jalisco while Mexican Federal Highway 200 was blocked by collapsed trees and floods. [16] 3,700 hectares of basic crops such as maize, wheat, beans and other crops such as bananas, papayas, or mangoes were destroyed by Lorena in Jalisco and recovery from this loss was anticipated to take months. [17] [18] Communications were briefly cut off, while 201 homes on the coastline were destroyed. [13] Damage in Jalisco was calculated at 17.7 million pesos (US$910,000). [19]
Governor of Colima, José Ignacio Peralta, stated on September 20 that nearly 8 inches of rain fell over the course of 24 hours during Lorena, and more than 7,400 acres of crops such as bananas and papayas were damaged statewide. [20] Further evaluation 3 days later showed seven months worth or 1,600 hectares of bananas, papayas, lemons, and cereal crops were destroyed by Lorena in Colima. [18] [21] Prices of bananas thus rose by over 3 pesos in the state. [18] La Boquita Beach was one of the most hard-hit areas of Manzanillo, with roofs ripped from homes and debris from the wind-damaged structures scattered across the area. [22] The cities Tecomán, Manzanillo, Villa de Álvarez, and Coquimatlán all had lost power due to Lorena according to the State Civil Protection Unit. [23] Mexico's National Water Commission reported that in one area 283 mm (11.1 in) of rain fell in Colima within a 24-hour period. [24] Peralta later stated that three rescues of people were required but there was no apparent loss of life. [23] Part of the Bridge of Tepalcates, a tourist destination in Manzanillo, collapsed during the hurricane, causing traffic to be shifted to a new road. [23] An overflow of the Armería River entirely cut off parts of Coquimatlán from traffic, while several landslides in Minatitlán blocked a road. [23] The Cuixmala River also broke its banks in the municipality of La Huerta and flooded agricultural land. [25] [26]
Once Lorena moved along the southwestern coast of Mexico, the government of Mexico issued a hurricane watch for the southern coast of Baja California as the storm was expected to make landfall there as a Category 1 hurricane. [27] Red (high-danger) warnings were issued for much of southern Baja California Sur. [28] Once Lorena moved away from the coast and started moving closer to Baja California Sur, residents started to barricade doors and windows and pull their boats from the ocean in preparation for landfall. [29] Government officials closed down schools for 506,000 students prior to the hurricane. [30] [28] Areas off the coast were initially expected to receive 40% of the state's annual rainfall within days. [31] As Lorena started to move parallel to the peninsula's coast, authorities in Los Cabos said that 787 people had taken refuge in 18 shelters; many tourists did not take precaution, however, and still traveled to Los Cabos. [20] Many flights in and out of Los Cabos International Airport were canceled on September 20. [32] The National Civil Protection Coordination declared a state of emergency in La Paz and Los Cabos, Baja California Sur on September 22. [33] The track of the hurricane was described as highly erratic and unpredictable. [34] Up to 125 mm (4.9 in) of rain fell near Los Cabos, although flooding was minimal at most due to the hurricane's small size at the time. [1] However, Lorena did produce life-threatening swells on much of the Baja California Peninsula in combination with Tropical Storm Mario. [35] [36] In Los Cabos, a father and son were swept out to sea by a large wave. The father drowned while trying to save his son, who survived. [37]
On September 18, Lorena briefly affected the states of Guerrero and Michoacán. There were reports of heavy rainfall and downed trees. [38] [39]
Residents of Sonora prepared for torrential rainfall as Lorena approached as a tropical depression on September 21. [40] Orange and yellow alerts were issued for much of the coast of Sonora as Lorena rapidly approached. [41] Two fishermen from Sonora in the Gulf of California were reported missing. [42] Isolated heavy rainfall was reported in Sonora with a maximum rainfall total of 112 mm (4.4 in) falling in 24 hours, but there was no reported damage. [43] [44] [24]
The remnants of Lorena passed through Arizona on September 22–24, causing widespread severe thunderstorms and resulting flash floods. [45] More than 8,000 customers lost electricity in the Phoenix area while flights at Phoenix Sky Harbor International Airport were delayed by hours, or cancelled. [45] Precipitation peaked at 4 to 6 in (100 to 150 mm) near Phoenix. [46] In preparation for the storm, free sandbags were offered to residents of Scottsdale to prevent flooding of households. [47] Flash flood warnings were issued for much of the Phoenix metropolitan area. [48] On September 23, a supercell thunderstorm produced a brief EF-0 tornado in New River in Maricopa County, the first time in 5 years the NWS Phoenix office had issued a tornado warning. Minor damage was reported in the area. [46] [49] Another EF-0 tornado very briefly touched down near Stanfield and was observed by a trained storm spotter, not causing any known damage. [50] A very rare phenomenon for the state also occurred when an EF-1 tornado formed in Willcox, snapping power lines, injuring 2 people, damaging a barn, and tossing over mobile homes. [51] [49] [52] One resident driving in the affected area reported that over 40 trees had been uprooted. [49]
A school bus with about 120 children on board was stranded in floodwaters, but they were safely rescued. [49] Locals north of downtown Phoenix and in Paradise Valley reported penny- to nickel-sized hail while visibility was down to less than a ¼ mile. [53] Due to low visibility, a nearly submerged car needed to be "fished" out of floodwaters. [53] A dust storm warning was briefly issued near Arizona State Route 85 as visibility became incredibly low. [54] The Chapter of the American Red Cross in Southern Arizona was deployed and brought aid as needed for effected homes and to assess damage, especially for the Willcox tornado. [55] [56]
Hurricane Juliette was a powerful Pacific hurricane that struck Mexico in September 2001. A long-lived tropical cyclone, Juliette originated from a tropical wave that exited western Africa, the same wave that earlier spawned Atlantic Tropical Depression Nine near Nicaragua on September 19. Two days later, a new tropical depression developed offshore Guatemala, which became Hurricane Juliette by September 22 as it rapidly intensified off western Mexico. On September 24 it strengthened into a Category 4 hurricane on the Saffir-Simpson scale, only to weaken due to an eyewall replacement cycle, then re-intensified a day later to attain maximum sustained winds of 230 km/h (145 mph), with a minimum barometric pressure of 923 mbar (27.3 inHg). Juliette weakened as it moved toward the Baja California peninsula, producing hurricane-force winds and torrential rainfall across Baja California Sur. On September 30 after the hurricane had weakened, Juliette made landfall near San Carlos as a minimal tropical storm. After drifting across the Gulf of California, Juliette dissipated on October 3.
Hurricane Marty was a Category 2 Pacific hurricane that caused extensive flooding and damage in northwestern Mexico just weeks after Hurricane Ignacio took a similar course. Marty was the thirteenth named storm, fourth hurricane, and the deadliest tropical cyclone of the 2003 Pacific hurricane season. Forming on September 18, it became the 13th tropical storm and fourth hurricane of the year. The storm moved generally northwestward and steadily intensified despite only a marginally favorable environment for development, and became a Category 2 hurricane before making two landfalls on the Baja California peninsula and mainland Mexico.
Tropical Storm Emilia was a rare tropical cyclone that affected the Baja California Peninsula in July 2006. The sixth tropical depression and fifth tropical storm of the 2006 Pacific hurricane season, it developed on July 21 about 400 miles (640 km) off the coast of Mexico. It moved northward toward the coast, reaching peak winds of 65 mph (105 km/h) before turning westward and encountering unfavorable conditions. Emilia later turned to the north, passing near Baja California as a strong tropical storm. Subsequently, the storm moved further away from the coast, and on July 27 it dissipated.
Hurricane Henriette was a minimal Category 1 hurricane that affected portions of Mexico in late August and early September 2007. The storm, which caused nine fatalities, formed from an area of disturbed weather on August 30, 2007, and became a tropical storm the next day. The cyclone moved parallel to the Mexican Pacific coast, but its proximity to the shore resulted in heavy rainfall over land. The most affected city was Acapulco, Guerrero, where six people were killed by landslides, and where over 100 families had to be evacuated after the La Sabana River flooded. Henriette then turned north and headed towards the Baja California peninsula, and became a Category 1 hurricane on the Saffir-Simpson Hurricane Scale. Henriette made its first landfall east of Cabo San Lucas at peak intensity, causing the death of one woman due to high surf.
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. It was below average only Category 3 storm was since 1981.
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.
Hurricane Odile is tied for the most intense landfalling tropical cyclone in the Baja California Peninsula during the satellite era. Sweeping across the peninsula in September 2014, Odile inflicted widespread damage, particularly in the state of Baja California Sur, in addition to causing lesser impacts on the Mexican mainland and Southwestern United States. The precursor to Odile developed into a tropical depression south of Mexico on September 10 and quickly reached tropical storm strength. After meandering for several days, Odile began to track northwestward, intensifying to hurricane status before rapidly reaching its Category 4 hurricane peak intensity on September 14. The cyclone slightly weakened before making landfall near Cabo San Lucas with winds of 125 mph (205 km/h). Odile gradually weakened as it tracked across the length of the Baja California Peninsula, briefly crossing into the Gulf of California before degenerating into a remnant system on September 17. These remnants tracked northeastward across the Southwestern United States before they were no longer identifiable on September 19.
Hurricane Blanca was the earliest recorded tropical cyclone in the calendar year to make landfall on the Baja California Peninsula. Forming as the second named storm, hurricane, and major hurricane of the annual hurricane season, the system first developed into a tropical depression on May 31. The storm initially struggled to organize due to strong wind shear, but once this abated, the system took advantage of high sea surface temperatures and ample moisture. After becoming a tropical storm on June 1, Blanca rapidly intensified on June 2–3, becoming a powerful Category 4 hurricane on the Saffir–Simpson hurricane wind scale; maximum sustained winds reached 145 mph (230 km/h) at this time. The hurricane's slow motion resulted in tremendous upwelling of cooler water, resulting in a period of weakening. Blanca gradually recovered from this and briefly regained Category 4 status on June 6 as it moved generally northwest toward the Baja California peninsula. Cooler waters and increased shear again prompted weakening on June 7 and the system struck Baja California Sur on June 8 as a weak tropical storm. It quickly degraded to a depression and dissipated early the next day.
Hurricane Newton was the first tropical cyclone to make landfall on the Baja California Peninsula at hurricane strength since Hurricane Odile in 2014. The fifteenth tropical depression, fifteenth named storm and ninth hurricane of the 2016 Pacific hurricane season, Newton formed from a tropical wave to the south of Mexico on September 4, 2016. Moving northwards through an environment conducive for additional development, Newton rapidly strengthened, reaching hurricane strength on the following day. Newton made landfall on the Baja California Peninsula just below peak strength on the same day. Interaction with the mountainous terrain of the peninsula caused some slight weakening, but Newton remained a hurricane until it entered the Gulf of California, at which time increasing wind shear caused Newton to weaken at a faster pace, and the system made landfall in Sonora late on September 6 as a strong tropical storm. The cyclone continued to rapidly weaken over the rugged terrain of Sonora, and it degenerated into a remnant low just south of the Mexico–United States border on September 7. The remnants of Newton dissipated early on the following day.
Hurricane Bud was a Category 4 hurricane that brought winds and severe flooding to Mexico throughout its existence as a tropical cyclone in June 2018. It was the second named storm, hurricane, and major hurricane of the 2018 Pacific hurricane season. Bud originated from a tropical wave that departed from Western Africa on May 29. It traveled across the Atlantic Ocean before entering the Northeast Pacific Ocean late on June 6. The system moved towards the northwest and steadily organized, becoming a tropical depression on June 9 and Tropical Storm Bud early the next day. Favorable upper-level winds, ample moisture aloft, and warm sea surface temperatures allowed the storm to rapidly intensify to a hurricane late on June 10, and further to a major hurricane on the following day. Bud ultimately peaked the next morning with maximum sustained winds of 140 mph (230 km/h) and a minimum central pressure of 943 mbar. Its track curved more northward while the storm rapidly succumbed to the effects of upwelling. Bud made landfall on Baja California Sur as a minimal tropical storm early on June 15. On the next day, land interaction and increasing wind shear caused Bud to degenerate into a post-tropical cyclone. It opened up into a trough of low-pressure on June 16. The remnants of Bud moved towards the Southwestern United States, bringing tropical moisture and gusty winds to the region.
The 2021 Pacific hurricane season was a moderately active Pacific hurricane season, with above-average activity in terms of number of named storms, but below-average activity in terms of major hurricanes, as 19 named storms, 8 hurricanes, and 2 major hurricanes formed in all. It also had a near-normal accumulated cyclone energy (ACE). The season officially began on May 15, 2021 in the Eastern Pacific Ocean, and on June 1, 2021, in the Central Pacific in the Northern Hemisphere. The season ended in both regions on November 30, 2021. These dates historically describe the period each year when most tropical cyclogenesis occurs in these regions of the Pacific and are adopted by convention. However, the formation of tropical cyclones is possible at any time of the year, as illustrated by the formation of Tropical Storm Andres on May 9, which was the earliest forming tropical storm on record in the Eastern Pacific. Conversely, 2021 was the second consecutive season in which no tropical cyclones formed in the Central Pacific.
Tropical Depression Nineteen-E was a weak yet costly tropical cyclone that caused significant flooding throughout Northwestern Mexico and several states within the United States in September 2018. The storm was also the first known tropical cyclone to form over the Gulf of California. Nineteen-E originated from a tropical wave that left the west coast of Africa on August 29 to 30. It continued westward, crossed over Central America, and entered the northeastern Pacific Ocean by September 7. It then meandered to the southwest of Mexico for the next several days as it interacted with a mid-to-upper level trough. The National Hurricane Center (NHC) continued to track the disturbance for the next several days as it traveled northward. A surface trough developed over the Baja California peninsula on September 18. Despite disorganization and having close proximity to land, the disturbance developed into a tropical depression in the Gulf of California on September 19, after having developed a circulation center and more concentrated convection. The system peaked with maximum sustained winds of 35 mph (55 km/h) and a minimum central pressure of 1002 mbar.
Hurricane Rosa brought widespread flooding to northwestern Mexico and the Southwestern United States in late September 2018, and was the first tropical cyclone to make landfall in Baja California since Nora in 1997. The seventeenth named storm, tenth hurricane, and seventh major hurricane of the 2018 Pacific hurricane season; Rosa originated from an Atlantic tropical wave that crossed the West African coast on September 6. The wave proceeded westward across the Atlantic, traversing Central America before entering the Gulf of Tehuantepec on September 22. There, the weather system acquired cyclonic features and became a tropical storm on September 25. Within a favorable atmosphere, Rosa entered a period of rapid intensification on September 27, peaking as a Category 4 hurricane with maximum sustained winds of 150 mph (240 km/h) a day later. Over the next few days, Rosa turned north and then northeast while steadily weakening, making landfall in Baja California as a tropical depression on October 2. After crossing over into the Gulf of California, the remnant system split apart and merged with an upper-level low off the coast of California by October 3.
Hurricane Sergio was a powerful and long-lived tropical cyclone that affected the Baja California Peninsula as a tropical storm and caused significant flooding throughout southern Texas in early October 2018. Sergio became the eighth Category 4 hurricane in the East Pacific for 2018, breaking the old record of seven set in 2015. It was the twentieth named storm, eleventh hurricane, and ninth major hurricane of the season.
Tropical Storm Narda was a short-lived tropical storm that remained close to the Pacific coast of Mexico, causing flash flooding and mudslides in southwestern Mexico and the Baja California Peninsula in late September 2019. The fourteenth named storm of the 2019 Pacific hurricane season, Narda developed from a broad area of low pressure that formed off the Central American Pacific coast on September 26. The broad low gradually organized as it moved west-northwestward, and it became Tropical Storm Narda early on September 29 while located off the southern coast of Mexico. The cyclone strengthened slightly before it moved inland near Manzanillo. Narda weakened to a tropical depression after moving inland, but restrengthened into a tropical storm on September 30 as it emerged over the Pacific Ocean just south of the Gulf of California. Narda quickly strengthened, and reached its peak intensity with winds of 50 mph (85 km/h) that day before making a second landfall along the northwestern coast of Mexico. The tropical cyclone weakened rapidly as it moved along the coastline, and it weakened to a tropical depression before dissipating just off the coast of Sonora on October 1.
Hurricane Dolores was a powerful and moderately damaging tropical cyclone whose remnants brought record-breaking heavy rains and strong winds to California. The seventh named storm, fourth hurricane, and third major hurricane of the record-breaking 2015 Pacific hurricane season, Dolores formed from a tropical wave on July 11. The system gradually strengthened, attaining hurricane status on July 13. Dolores rapidly intensified as it neared the Baja California peninsula, finally peaking as a Category 4 hurricane on the Saffir–Simpson scale with winds of 130 mph (215 km/h) on July 15. An eyewall replacement cycle began and cooler sea-surface temperatures rapidly weakened the hurricane, and Dolores weakened to a tropical storm two days later. On July 18, Dolores degenerated into a remnant low west of the Baja California peninsula.
Hurricane Genevieve was a strong tropical cyclone that almost made landfall on the Baja California Peninsula in August 2020. Genevieve was the twelfth tropical cyclone, eighth named storm, third hurricane, and second major hurricane of the 2020 Pacific hurricane season. The cyclone formed from a tropical wave that the National Hurricane Center (NHC) first started monitoring on August 10. The wave merged with a trough of low pressure on August 13, and favorable conditions allowed the wave to intensify into Tropical Depression Twelve-E at 15:00 UTC. Just six hours later, the depression became a tropical storm and was given the name Genevieve. Genevieve quickly became a hurricane by August 17, and Genevieve began explosive intensification the next day. By 12:00 UTC on August 18, Genevieve reached its peak intensity as a Category 4 hurricane, with maximum 1-minute sustained winds of 130 mph and a minimum central pressure of 950 millibars (28 inHg). Genevieve began to weaken on the next day, possibly due to cooler waters caused by Hurricane Elida earlier that month. Genevieve weakened below tropical storm status around 18:00 UTC on August 20, as it passed close to Baja California Sur. Soon afterward, Genevieve began to lose its deep convection and became a post-tropical cyclone by 21:00 UTC on August 21, eventually dissipating off the coast of Southern California late on August 24.
Tropical Storm Hernan was a short-lived tropical cyclone that brought widespread flooding and destructive mudslides to southwestern Mexico in late August 2020. Hernan was the thirteenth tropical cyclone and eighth named storm of the 2020 Pacific hurricane season. The system developed from a low-pressure area to the southwest of Mexico on August 26, as a low-end tropical storm. Moving generally northward and paralleling the west coast of Mexico, Hernan was hindered by a high wind shear environment and only slightly strengthened. The cyclone achieved its peak intensity around 06:00 UTC on August 27 with maximum sustained winds of 70 km/h (45 mph) and a minimum barometric pressure of 1,001 mbar (29.6 inHg). Passing just offshore of the state of Jalisco, Hernan turned west and degenerated to a remnant low on August 28. The low passed near the southern tip of the Baja California Peninsula later that day and dissipated shortly thereafter.
Hurricane Enrique was a Category 1 Pacific hurricane that brought heavy rainfall and flooding to much of western Mexico in late June 2021. The fifth named storm and first hurricane of the 2021 Pacific hurricane season, Enrique developed from a tropical wave the entered the Pacific Ocean off the coast of Nicaragua on June 22. In an environment conducive for intensification, the disturbance moved west-northwestward and developed into a tropical storm by 6:00 UTC on June 25, as it was already producing winds of 40 mph (65 km/h), and received the name Enrique. Enrique strengthened steadily within an environment of warm waters and low-to-moderate wind shear while continuing its northwestward motion. By 12:00 UTC on June 26, Enrique had intensified into a Category 1 hurricane as the storm turned more northwestward. Nearing the coast of Mexico, Enrique reached its peak intensity around 6:00 UTC the following day, with maximum sustained winds of 90 mph (150 km/h) and a minimum barometric pressure of 972 mbar (28.7 inHg). Enrique, passing closely offshore west-central Mexico, maintained its intensity for another 24 hours as it turned northward toward the Gulf of California. Turning back to the northwest on June 28, increasing wind shear and dry air caused the hurricane to weaken. Enrique dropped to tropical storm status at 18:00 UTC that day, and further weakened to a tropical depression on June 30 just to the northeast of Baja California. The depression was absorbed into a larger low pressure area to the southeast later that day.
Hurricane Nora was a large tropical cyclone that caused significant damage across the Pacific Coast of Mexico in late August 2021. The fourteenth named storm and fifth hurricane of the 2021 Pacific hurricane season, Nora was first monitored by the National Hurricane Center (NHC) as an area of low pressure near the coast of Mexico. On August 24, the low organized into tropical depression, but struggled to develop further due to wind shear in its surrounding environment. The depression eventually intensified into a tropical storm and was named Nora as it tracked to the west-northwest. Nora peaked as a strong Category 1 hurricane with maximum sustained winds of 85 miles per hour (140 km/h) on August 28. The storm then grazed the west coast of Mexico and made landfall two separate times, first in the state of Jalisco, followed by neighboring Nayarit. Nora weakened as it interacted with land, dissipating on August 30 just inland of the Mexican coast.