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Hamish Downgraded but Still Causing Severe Weather along Queensland Coast

March 10th, 2009 Category: Tropical Cyclones

Tropical Cyclone 18P (Hamish) - March 10th, 2009 © CIMSS-Univ. of Wisconsin

Tropical Cyclone 18P (Hamish) - March 10th, 2009

TC 18P - March 9th, 2009 © JTWC

TC 18P - March 9th, 2009

Tropical Cyclone 18P (Hamish) has been downgraded to category three, however a severe weather warning has been issued along the central and southeast coast of Queensland, the Australian Associated Press reported. Cyclone Hamish was about 160km east-northeast of Sandy Cape at 10am (AEST) todayand was moving at 10km/h slightly away from the coastline.

The Bureau of Meteorology announced that the weather alert for areas between Yeppoon and Tewantin had been cancelled, as the cyclone is expected to hover offshore for the next few days. However, a severe weather warning has been issued from Sandy Cape to Coolangatta, where gale force winds, rough seas and abnormally high tides are expected.

At the time of the Joint Typhoon Warning Center’s last report, issued at 0300Z, Hamish was located approximately 210 nautical miles north-northeast of Brisbane, Australia, and had tracked southeastward at 7 knots over the past 6 hours.

Recent animated METSAT imagery depicts a very intense system with deep convection primarily located on the south and eastern periphery of the storm.

The cyclone remains very intense as confirmed by Dvorak satellite intensity estimates from PGTW and ABRF, and although intensity is beginning to wane as vertical wind shear (VWS) adversely affects the system, the storm will maintain strength as a significant tropical cyclone throughout the forecast period.

Forecast track © Univ. of Wisconsin

Forecast track

Over the next 24 hours, the system will track generally eastward, while steadily weakening under increasing vertical wind shear associated with an approaching mid-level trough to the west.

As this weakening occurs, the storm will slow as the primary steering influence transfers from the deep layer ridging to the East, to the low to mid-level subtropical ridge to the South causing the storm to enter into a slow loop between TAU 24 and 36.

Maximum significant wave height is 24 feet.

Please click here for all articles on Tropical Cyclone Hamish.

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