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Tropical Cyclone 05S (Billy) Makes Landfall Over Australia

December 19th, 2008 Category: Tropical Cyclones

Tropical Cyclone 05S (Billy) - December 19th, 2008

Tropical Cyclone 05S (Billy) - December 19th, 2008

Tropical Cyclone 05S - enhanced image

Tropical Cyclone 05S - enhanced image

Tropical Cyclone 05S (Billy), located approximately 175 nautical miles southwest of Darwin, Australia, has remained quasi stationary over the past 6 hours.

It has meandered around the southern Joseph Bonaparte Gulf, causing abnormally high tides and flooding, during the past 12 hours as the primary steering influence shifts from a near equatorial ridge to the northeast, to a subtropical ridge building along the poleward side of the system.

The cyclone will soon begin to accelerate westward as this subtropical ridging builds.

Recent animated multispectral and water vapor satellite imagery and radar data from Wyndham show a marked increase in deep convection and improved organization of the low level circulation center.

Favorable poleward outflow and passage over favorable warm water will allow the current intensification trend to continue prior to landfall.

However, the rate of intensification will likely be limited by land interaction along the western and southern peripheries of the low level circulation center.

Tropical Cyclone 05S - multispectral satellite imagery © JTWC

Tropical Cyclone 05S - multispectral satellite imagery © JTWC

As the cyclone moves inland after Tau 12, steady dissipation will occur.

Maximum significant wave height is 10 feet.

source JTWC

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