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Hurricane Dora Near Coast of Mexico

16.2N 106.6W

August 1st, 2011 Category: Tropical Cyclones

Hurricane Dora (04E) - July 20th, 2011

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Dora Near Coast - July 20th, 2011

At 1800 UTC July 18, a disturbance off the coast of Mexico was designated as Tropical Depression Four-E. By the time Four-E was designated, well-defined bands of convection and a tight inner wind field were observed.

Despite modest northerly upper-level winds, the depression strengthened into a tropical storm, receiving the name Dora. Dora began to move west-northwestwards under the influence of a strong high pressure system. Gradual intensification ensued, and an eye began to form in Dora the next day.

Late on July 19, Dora attained hurricane status with hurricane-force winds extending up to 35 miles (55 km) from the center as the eyewall contracted. Dora continued to gradually strengthen early on July 20. However, in the afternoon, at the time these images were acquired, Hurricane Dora rapidly intensified to a major hurricane, the second of the season with winds of 115 miles per hour (185 km/h) and higher gusts. The inner core solidified and eyewall mesovortices were hinted. Dora continued to quickly intensify, becoming a category 4 hurricane just hours later with maximum wind speeds of 135 miles per hour (217 km/h) and a hurricane-force wind field extending to a 40 miles (64 km) radius.

The next day, Dora began to take on the appearance of an annular hurricane, with an eye similar to those seen in Hurricane Isabel. Continuing to rapidly intensify, Hurricane Dora attained peak intensity later on July 21 with winds of 155 miles per hour (249 km/h) and a central minimum pressure of 942 millibars (942 hPa) while 445 miles (715 km) south-southeast of Cabo San Lucas, Mexico.

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