Abstract
The Australian east coast is subject to a range of synoptic/mesoscale weather systems ranging from low-pressure troughs, small explosive low-pressure systems near the Australian east coast, to synoptic scale maritime low-pressure systems, and both tropical and extra-tropical cyclones. These systems vary dynamically in intensity and structure across a spectrum that includes both weak and intense cold-cored systems, to warm-cored tropical cyclones and “hybrid” systems. A preliminary 10 year climatology, from 1992 to 2001, is presented that concentrates on those cyclones in open waters that threaten life and property as a result of heavy coastal rain or the combined effects of wind, sea state and swell, including both long fetch and storm surges. There are 28 systems in the 10-year climatology. In terms of their development, the most numerous were the 50% of storms that occurred as systems within an easterly trough, followed by 21% that occurred as circulations on decaying Tasman Sea cold fronts.
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