Hurricane Carlotta (2012)

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Map key
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
Disc Plain black.svg Tropical cyclone
Solid black.svg Subtropical cyclone
ArrowUp.svg Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

On June 12, a tropical disturbance developed off the west coast of Costa Rica, moved westward and entered the eastern Pacific after crossing Panama. [1] [2] The system became better organized as it tracked to the west-northwest as a westerly Kelvin wave provided favorable conditions for development. [1] [3] Convection increased around a developing low pressure area, and the National Hurricane Center (NHC) estimated a 50% chance of tropical cyclogenesis by late on June 12. [4] After further organization, the NHC initiated advisories on Tropical Depression Three-E at 0300  UTC on June 14, while the system was located about 515 mi (829 km) south-southeast of Puerto Ángel, Oaxaca. At the time, the depression was located in an area of low wind shear and warm sea surface temperature conditions that were considered favorable for intensification. In addition, it had a small circulation, which increased the possibility for rapid deepening. The system moved northwestward after forming due to an extended ridge to the northeast. [5] About six hours after forming, the depression intensified into Tropical Storm Carlotta, after rainbands increased around the center. [6]

With continued favorable conditions, Carlotta quickly developed a ragged central dense overcast, or centralized area of convection. [7] An eye feature began developing on June 15, [8] and later that day Carlotta intensified into a hurricane while approaching southwestern Mexico. [9] A Hurricane Hunters flight late on June 15 indicated Carlotta was rapidly intensifying, observing winds of 110 mph (180 km/h) in the eye and well-established outflow; the crew also observed flight-level winds of 114 mph (183 km/h). The NHC initially predicted the hurricane would move along the Mexican coast just offshore, which would have allowed Carlotta to maintain much of its intensity. [10] Shortly after its peak, Hurricane Carlotta weakened slightly as to the eye's began to interact with land. [11] The hurricane made landfall near Puerto Escondido, Oaxaca, with winds estimated at 105 mph (169 km/h) and a minimum pressure of 976 mbar (28.8 inHg), shortly after 0100 UTC on June 16, [12] becoming the easternmost tropical cyclone in the Eastern Pacific to make landfall at hurricane intensity on record until surpassed by Hurricane Barbara a year later. [1] [13] Carlotta rapidly weakened while moving inland, and it had deteriorated to tropical depression status by 12 hours after landfall. Although the cloud pattern became disrupted, the storm maintained a large area of thunderstorms. [14] Very early on June 17, the NHC reported that Carlotta had weakened into a post-tropical remnant low; the system still had a broad circulation over southwestern Mexico at the time. [15] Later that day, the low degenerated into a trough along the west coast of Mexico. [16]

Preparations and impact

Tropical Storm Carlotta intensifying on June 14 Tropical Storm Carlotta (2012) Jun 14 2012.jpg
Tropical Storm Carlotta intensifying on June 14

When the system was first classified as a tropical cyclone on June 14, the government of Mexico issued hurricane watch and a tropical storm watch for a portion of the Mexican Coast from Barra de Tonala to Punta Maldonado. [17] Later that day, the watch was upgraded into a hurricane warning. [18] Meanwhile, authorities issued an orange alert for most of Oaxaca, the second highest alert, and a yellow alert, the third highest alert, for northern Oaxaca, Chiapas and Guerrero.[ citation needed ] A green alert was issued for the state of Puebla, and blue alert, the second lowest alert, for southern Veracruz, Tabasco, Tlaxcala, Morelos and Michoacán. [19] In Oaxaca, officials arranged evacuations for residents in low-lying areas to go to schools, halls, and churches. In the fishing port of Puerto Angel, boating access was restricted. [20] and the port of Salina Cruz was closed. To avoid family separations, schools were closed for several states. The government electricity agency channeled 608 electrical workers due to the threat of damage in the states of Oaxaca and Guerrero. A total of 23 plants were moved to provide emergency power supply.[ citation needed ]

Seven people were killed by the storm. [21] A 56-year-old woman was killed in a traffic accident that is blamed by the storm's gusty winds that flipped over her car. [22] In Pluma Hidalgo, Carlotta destroyed a clay house that killed a 13-year-old girl and her 7-year-old sister. The hurricane ripped off roofs of houses and caused widespread power outages and small landslides. About 1,200 people moved to shelters throughout the city. [23] According to authorities in Oaxaca, some roads were affected by mudslides; subsequently, they had opened emergency shelters and evacuated many of families from low-lying areas. In Puerto Escondido, near where the storm made landfall, billboards were toppled and windows were shattered. [24] Towns throughout Oaxaca reported damage to roads, bridges, telephone lines, and crops. Rainfall from Carlotta peaked at 13.78 in (35.0 cm) in San Juan Bautista Tuxtepec. [1] In wake of the storm, the governor of Oaxaca requested the Mexican government to declare his state a disaster area, [25] and requested MX$1.44 billion (US$113 million) for repairs to public infrastructure. At least 29,000 homes and 2,500 businesses sustained damage from Carlotta, mostly in Oaxaca. [1] Total insured losses caused by Carlotta were estimated to be about US$12.4 million. [21]

See also

Notes

  1. Conversions from Mexican Pesos to United States Dollars were done using this site, with an exchange date of June 16, 2012.

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References

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Hurricane Carlotta
Carlotta Jun 15 2012 2000Z.png
Carlotta at peak intensity, nearing landfall in Mexico on June 15.