Australian east coast low

Australian east coast lows (known locally as east coast lows, maritime lows, and east coast cyclones) are extratropical cyclones or low-pressure systems on the coast of southeastern Australia that may be caused by both mid-latitude and tropical influences over a variety of levels in the atmosphere. These storms should not be confused with Australian region tropical cyclones which typically affect the northern half of the continent.

Source: Wikipedia — Australian east coast low (CC BY-SA 4.0)