A cool southerly surge is moving up the Eastern Seaboard producing a thick deck of cloud east of the dividing ranges in New South Wales. Significant thunderstorm activity is driving an area of mid to high level cloud about central Australia, close to an inland trough extending from the northern interior of Western Australia through to the south east coast of Queensland. A high pressure system is pushing patchy low level cloud into the southern coast of Australia and the Tasmanian coast.