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Claudia (03S) Intensifies to Intense Tropical Cyclone

17.5S 72.6E

December 11th, 2012 Category: Tropical Cyclones

Tropical Cyclone Claudia (TC 03S) – December 9th, 2012

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Track of Tropical Cyclone Claudia (TC 03S) - December 11th, 2012 © Univ. of Wisconsin

Track of TC 03S

Tropical Storm Claudia (03S),

located approximately 775 nm south of Diego Garcia, has tracked southward at 08 knots over the past six hours. Maximum significant wave height is 30 feet.

Animated multispectral satellite imagery (MSI) shows the organization of the low level circulation center (LLCC) has been steadily declining over the past 12 hours. Dvorak intensity fixes estimate the current intensity at 65 knots.

The LLCC shows indications of an east-west elongation as it continues to track southward. Sea surface temperatures (SSTs) have been decreasing quickly as Claudia tracks southward, and are currently near 24 to 25 degrees Celsius. Upper level analysis indicates TC 03S has moved south of the subtropical ridge (STR) axis and is under moderate (20 knots) vertical wind shear (VWS).

A total precipitable water loop shows dry air along the southwestern quadrant of the system is beginning to wrap towards the center. The system is forecast to continue tracking along the western periphery of a deep layered STR towards the mid-latitudes, where increasing interaction should start the extra-tropical transition process by TAU 36. The steady decrease in SSTs and increase in VWS, as the system approaches the mid-latitudes, will lead to the full transition of TC 03S to an extra-tropical low by TAU 48.

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