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Dora (04E) at Time of Downgrading from Hurricane to Tropical Storm – August 2nd, 2011

21.7N 112.2W

August 2nd, 2011 Category: Image of the day, Tropical Storms

Hurricane Dora (04E) - July 22nd, 2011

Enhanced image

Hurricane Dora (04E) 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.

However, Dora began to traverse colder waters and encountered unfavorable wind shear. The eye abruptly dissipated and convection became much less organized. Within 12 hours, Dora already weakened into a category 3 hurricane.

On July 22, the day these images were acquired, the low-level circulation center became exposed as convection shifted to the southern semicircle. Dora continued to be sheared by strong northwesterly wind shear as it quickly weakened. Dora’s satellite signature deteriorated along with much of its convection. The hurricane was downgraded to a tropical storm late on July 22 as it moved into hostile atmospheric conditions and cooler water.

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