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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, (Eye witness reports state the first landfall was directly over Cabo) causing the death of one woman due to high surf. Hurricane Henriette then emerged over the Gulf of California, and made its second landfall near Guaymas, Sonora. After causing heavy rains in Sonora, the storm dissipated over the Sierra Madre Occidental and its remnants went on to cause flooding in New Mexico and Texas. Damage totaled about $275 million (2007 MXN, $25 million 2007 USD). It hit Mexico on the same day Hurricane Felix hit Nicaragua, only one of two occurrences in which a North Atlantic hurricane and a Pacific hurricane made landfall on the same day. ==Meteorological history== Henriette originated from a tropical wave that departed the west coast of Africa on August 20, 2007. The wave produced some convection while in the Caribbean Sea but reached Central America on August 28 before any significant development could occur. Early on August 30, the area of low pressure, now 400 miles (640 km) south-southeast of Acapulco, Mexico, started to gain clusters of strong convection. By the afternoon of August 30 the system continued to show strong convection and had developed a broad but well defined area of low to mid level cyclonic turning. By 0600 UTC that day the system became a tropical depression about southeast of Acapulco and was designated as Tropical Depression Eleven-E.〔 Convection continued but the cyclone was encountering extensive easterly to north-easterly wind shear which stinted the strengthening of this storm throughout its history.〔 The cyclone initially headed toward the west-northwest around a subtropical ridge that was centered over the western Gulf of Mexico. The depression moved north west, parallel with the west coast of Mexico due to being steered by the mid/upper-level ridge.〔 On August 31, it strengthened to become Tropical Storm Henriette, 85 miles (137 km) south of Acapulco. It continued to move along the Mexican coast bringing heavy rains. With continued strong convection, Henriette maintained its strengthening and was predicted to reach hurricane strength. However, despite the low wind shear and apparent warm waters. Henriette did not strengthen as expected. This is believed to be due to its proximity to land and colds waters being brought up due to Henriette's slow movement. The convection and strengthening continued and maintained itself as it moved away from Jalisco. Henriette turned westward and away from the Pacific coast of Mexico late on September 1 as the subtropical ridge built westward over northern Mexico.〔 Henriette continued to improve in structure and with the formation of a distinct eye feature, reached hurricane strength on September 4 as it turned north-northwestward toward the Baja California peninsula, ahead of a mid-latitude trough approaching the west coast of the United States. The hurricane reached its peak intensity of 85 mph (135 km/h) that morning while centered about 75 miles (120 km)south-southeast of Cabo San Lucas.〔 The center of Henriette made landfall just east of Cabo San Lucas on the afternoon of September 4 with winds of 80 mph (130 km/h). It was over land for only about six hours before emerging into the Gulf of California. The brief interaction with land caused a slight weakening, but Henriette remained a Category 1 hurricane for most of that day. The next day it made final landfall near Guaymas in the state of Sonora. Henriette weakened quickly over land and dissipated over the mountains of northwestern Mexico early on September 6.〔 The remnants of Tropical Storm Henriette continued to track across west Texas and southeastern New Mexico as it was being absorbed by a cold front moving through New Mexico. The flow of moisture from originating from these remnants, moderate instability, and marginal shear contributed to flash flooding and severe thunderstorms. 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 Henriette (2007)」の詳細全文を読む スポンサード リンク
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