A broad area of thick cloud and extensive storm activity lies over the country's tropical north. A heat low and trough through northern inland parts of Western Australia brings a patchy sheet of mid level cloud to the region. Thick low level cloud sweeps over much of the New South Wales coast and up into southeast Queensland, the result of moist onshore flow and an upper disturbance. An upper level disturbance is causing a mid to upper level cloud band to drift over the border of Victoria and South Australia. A high pressure system southeast of Tasmania drives a thick sheet of low level cloud over much of Tasmania. Some patches of thick low level cloud also sweep over the south coast of Western and South Australia, due to a large high pressure ridge to the country's southwest. The rest of the country is mostly cloud free.