|
Hurricane Erika was a weak hurricane that struck extreme northeastern Mexico near the Texas-Tamaulipas border in mid-August of the 2003 Atlantic hurricane season. Erika was the eighth tropical cyclone, fifth tropical storm, and third hurricane of the season. At first, the National Hurricane Center (NHC) operationally did not designate it as a hurricane because initial data suggested winds of 70 mph (115 km/h) at Erika's peak intensity. It was not until later data was analyzed that the NHC revised it to Category 1 intensity in the Saffir-Simpson Hurricane Scale. The storm developed from a non-tropical area of low pressure that was tracked for five days before developing in the eastern Gulf of Mexico on August 14. Under the influence of a high pressure system, Erika moved quickly westward and strengthened under favorable conditions. It made landfall as a hurricane on northeastern Mexico on August 16 and rapidly dissipated inland. While Erika's precursor disturbance was moving across Florida, it dropped heavy rainfall. In south Texas, Erika produced moderate winds of 50 to 60 mph (80 to 95 km/h) along with light rain, causing minor and isolated wind damage in the state. In northeastern Mexico, Erika produced moderate amounts of rainfall, resulting in mudslides and flooding. There, two people were killed when their vehicle was swept away by floodwaters. ==Meteorological history== A weak surface area of low pressure detached from a frontal system on August 8 while 1,150 miles (1,850 km) to the east of Bermuda. It moved southwestward, and on August 9, it generated convection as it passed beneath a cold-core upper-level low. The surface low and the upper-level low turned westward as it revolved around a common center, and by August 11, the surface low developed into a trough while 440 miles (700 km) south of Bermuda. As the system rapidly continued westward, much of the convection remained near the center of the upper-level low, preventing development of a closed surface circulation. On August 13, while located near the northwestern Bahamas, a substantial increase in convection resulted in the upper-level low building downwards to the middle levels of the troposphere, coinciding with the development of an upper level anticyclone. A closed low-level circulation nearly developed on August 14 to the east of Key Largo, Florida, but it weakened due to the deep convection remaining to the north over the mid-level center. The mid-level storm continued westward and moved across Florida.〔 After crossing Florida, Hurricane Hunters indicated a poorly defined circulation, but with winds exceeding tropical storm strength, and the system was designated as Tropical Storm ''Erika'' late on August 14 while located 85 miles (135 km) west of Fort Myers. With well-established outflow and low levels of wind shear,〔 Erika strengthened as the circulation became better defined. A high pressure system persisted over the south-central United States, forcing the storm to move just south of due west at 25 mph (40 km/h). On August 15, convection organized into bands, and as its winds approached hurricane strength, an eye developed within the storm. Erika turned to the west-southwest on August 16, and attained hurricane status just prior to making landfall near Boca San Rafael, Tamaulipas in northeastern Mexico, or about 40 miles (70 km) south of the United States–Mexico border. The storm rapidly weakened over the mountainous Sierra Madre Oriental, and Erika dissipated early on August 17.〔 The mid-level circulation maintained integrity as it crossed Mexico, and led to the formation of a tropical disturbance after entering the Gulf of California on August 18. It turned to the northwest and weakened on August 20. Operationally Erika was never upgraded to hurricane status. Based on a persistent eye feature on radar and Doppler weather radar-estimated surface winds of 75 mph (120 km/h), the National Hurricane Center posthumously upgraded Erika to a hurricane.〔 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 Erika (2003)」の詳細全文を読む スポンサード リンク
|