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Tropical Cyclone 22S Forms Between Indonesia and Australia

March 18th, 2009 Category: Tropical Cyclones

Tropical Cyclone 22s - March 18th, 2009

Tropical Cyclone 22s - March 18th, 2009

TC 22s - March 18th, 2009 © JTWC

TC 22s - March 17th, 2009

Tropical Cyclone 22s, located approximately 510 nautical miles north of Learmonth, Australia, has tracked west-southwestward at 15 knots over the past 6 hours. Maximum significant wave height  is 8 feet.

Animated multispectral imagery shows deep convection forming in the southwest and southeast quadrants (visible on the right side of the main image) and in the center of a well-defined circulation.

Animated water-vapor imagery shows the system developing a poleward outflow channel in the last few hours. An SSMI image shows well-defined deep convective bands wrapping around the South and into a well defined low level circulation center (LLCC).

Track of TC 22s - March 18th, 2009 © Univ. of Wisconsin

Track of TC 22s - March 18th, 2009

The system is in an area of moderate vertical wind shear and high sea surface temperatures. As the system tracks to the west-southwest it will move closer to the axis of the upper level anti-cyclone and will be in an area of more favorable vertical windshear and upper-level outflow.

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