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Hurricane Barbara was the easternmost landfalling Pacific hurricane on record. As the first hurricane of the 2013 Pacific hurricane season, Barbara developed from a low-pressure area while located southeast of Mexico on May 28. It headed slowly north-northeastward and strengthened into a tropical storm early on the following day. After recurving to the northeast, Barbara intensified into a Category 1 hurricane on May 29 and made landfall in Chiapas at peak intensity with winds of 80 mph (130 km/h) and a barometric pressure estimated at 983 mbar (hPa; 29.03 inHg). When the hurricane made landfall, it was the second earliest landfalling hurricane in the basin since reliable records began in 1966. Barbara then moved across the Isthmus of Tehuantepec and dissipated within the mountainous terrain of Sierra Madre de Chiapas on May 30. The precursor of Hurricane Barbara brought light to moderate rainfall to El Salvador. Many homes were damaged, roads were flooded, and several trees were downed. One fatality was reported in the country. Landslides caused by rainfall in Guatemala forced 30 people to flee their homes. In Mexico, tropical cyclone warnings and watches were issued in anticipitation of the storm. Many shelters opened in Chiapas, Oaxaca and Guatemala while schools and ports were temporarily closed during the storm. Torrential rains and power outages were reported in the area. In the state of Chiapas alone, 2,000 houses were damaged. About 57,000 people were left homeless. Significant impact to agriculture was also reported, with of crops destroyed. Overall, Barbara caused 5 fatalities and at least $1 million (2013 USD) in damage. ==Meteorological history== A tropical wave moved off the west coast of Africa on May 16 and crossed Central America into the Pacific Ocean on May 24. That day, the National Hurricane Center (NHC) began monitoring an area of disturbed weather about 150 mi (240 km) southwest of the Costa Rican coastline. At that time, this system was associated with a monsoon trough embedded within the Intertropical Convergence Zone. Despite being disorganized, gradual development of this system was anticipated by the NHC.〔 On May 25, a broad low pressure area formed southwest of Nicaragua, after the tropical wave interacted with an eastward-moving Kelvin wave.〔 Convection soon became organized around the newly formed low, and the NHC noted that the formation of a tropical cyclone within the subsequent 48 hours was likely. The NHC estimated that Tropical Depression Two-E developed at 1200 UTC on May 28 about 125 mi (205 km) south-southeast of Puerto Ángel, Oaxaca.〔 With warm water temperatures of over 86 °F (30 °C) and low wind shear, the newly formed tropical depression was able to quickly intensify.〔 It developed a well-defined center with concentrated deep convection. Continued organization prompted the NHC to upgrade the depression to Tropical Storm ''Barbara'' at 0000 UTC on May 29. Post-analysis indicated that Barbara intensified into a tropical storm six hours earlier than originally assessed.〔 Barbara began exhibiting an eye-like feature, and intensity estimates using the Dvorak Technique reached 40 mph (65 km/h). At this time, Barbara had begun to recurve to the northeast, within a gap of the subtropical ridge.〔 By midnight, the eye-like feature developed into a central dense overcast (CDO), embedded within the deep convection. The rainbands of Barbara wrapped around much of the circulation, and radar imagery indicated the eyewall was consistently becoming better defined.〔 Thereafter, the storm entered a phase of intensification as it began to accelerate towards the Chiapan coastline. Barbara strengthened into a hurricane around 1800 UTC on May 29 while located about 65 mi (105 km) east-southeast of Salina Cruz, Mexico. At its peak intensity as it was making landfall, it had maximum sustained winds of 80 mph (130 km/h) and a barometric pressure estimated at 983 mbar (hPa; 29.03 inHg).〔 With this intensity, Barbara made landfall on the coast of Tonalá, Chiapas at approximately 1950 UTC. This marked both the easternmost and second earliest landfalling hurricane in the basin since reliable records began in 1966. As Barbara moved inland within the Isthmus of Tehuantepec, rapid dissipation occurred. The cloud tops warmed and Barbara degenerated into a tropical storm at 0000 UTC on May 30.〔 This was followed by a downgrade to tropical depression nine hours later as Barbara's low-level circulation was disrupted by the mountainous terrain. Very early on May 31, the surface circulation of Barbara soon dissipated about 25 mi (40 km) north-northwest of Coatzacoalcos, Mexico, prior to emerging into the Gulf of Mexico.〔http://www.nhc.noaa.gov/data/tcr/EP022013_Barbara.pdf〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hurricane Barbara (2013)」の詳細全文を読む スポンサード リンク
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