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Tropical Cyclone 13S (Gael) Forms in Indian Ocean

February 3rd, 2009 Category: Tropical Cyclones

Tropical Cyclone 13S (Gael) - February 3rd, 2009

Tropical Cyclone 13S (Gael) - February 3rd, 2009

TC 13S - multispectral satellite image © JTWC

TC 13S - multispectral satellite image

The area of convection in the Indian Ocean observed yesterday has strenghthened and become Tropical Cyclone 13S (Gael).

The system, located approximately 580 nautical miles east-northeast of La Reunion, has tracked west-southwestward at 11 knots over the past 6 hours.

It lies slightly equatorward of an upper-level ridge axis, in an area of moderate easterly vertical wind shear.

Recent animated multispectral satellite imagery shows a partially-exposed low level circulation center (LLCC) with deep convection confined to its western periphery.

Low to mid-level subtropical ridging to the south of Gael is expected to steer the system generally westward through the forecast period.

Persistent vertical wind shear will hold intensification to a slow rate over the next 12 to 24 hours.

Thereafter, vertical wind shear will decreased as 13S nears the upper-level ridge axis, allowing the cyclone to intensify more rapidly.

Maximum significant wave height is 13 feet.

source JTWC

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