Saturday, August 13, 2011

Tropical Storm Franklin (2011)

Storm Active: August 12-14

On August 10, a large trough of low pressure formed over Florida, with shower activity extending both east into the Atlantic, and west into the Gulf of Mexico. This activity moved generally to the northeast and interacted with a front moving off of the east coast. During the morning of August 12, convection concentrated at a low pressure center on the front, but the elongated nature of the frontal low kept it extratropical through the morning. As it accelerated away from land, the low became well-defined, and became disconnected from the front. As a result, Tropical Depression Six formed that afternoon, just north of Bermuda.

The effects on the island were only to the extent of scattered showers and gusty winds, as Six was tracking quickly away to the northeast. By the morning of August 13, the presence of deep convection within the system allowed it to intensify into Tropical Storm Franklin. Through the morning, thunderstorm activity with this tropical storm continued to increase, and outflow improved in all quadrants, despite increasing shear. Following this increase in organization, Franklin reached its peak intensity of 45 mph winds and a central pressure of 1004 mb during the day. However, Franklin was quickly approaching colder waters, and rapid weakening ensued that evening. By the following morning, Franklin had become extratropical. The remnant low of Franklin tracked east, and was quickly absorbed. The cyclone affected no land.

Tropical Storm Franklin over the open waters of the northwest Atlantic.

Track of Franklin.

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