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Tropical Cyclone Laurence (06S) Continues Land Interaction by Australian Coast – December 17th, 2009

17.9S 122.2E

December 17th, 2009 Category: Image of the day, Tropical Storms

Tropical Cyclone Laurence (06S) - December 16th, 2009

Tropical Cyclone Laurence (06S) - December 16th, 2009

Track of TC 06S - December 16th, 2009 © Univ. of Wisconsin

Track of TC 06S

Enhanced image

Enhanced image

Tropical Cyclone Laurence (06S), located approximately 130 nm east-northeast of Broome, Australia, has tracked southward at 2 knots over the last six hours. Animated infrared satellite imagery shows that the system has tracked onto land and is starting to slow down.

Model guidance indicates TC 06S will continue to track under the influence of a mid-level ridge located over the western portion of central Australia. The ridge is expected to re-align over the next 48 hours, causing the track to shift to a more westward direction.

As the system weakens the steering will shift to the lower levels, and surface ridging across southern Australia will help to keep the low level tracking towards the coast again around TAU 48. Land effects and increasing vertical wind shear will weaken the system throughout the next 48 hours, and is not expected to re-develop after approaching the coast. However, there are some models suggesting the system could track back over water and re-develop.

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