A band of patchy cloud through all levels of the atmosphere slowly moves through the southern half of Western Australia and can be seen crossing the border into South Australia. This is due to a low pressure trough in the region. Isolated patches of low level cloud forms over the southwestern corner of the continent. Ahead of this trough, moist air in the upper atmosphere is being dragged southward over Victoria, Tasmania, and coastal parts of South Australia. This is generating a thick field of mid to upper level cloud through the southeast of the country. A low offshore of the east coast is directing patches of low to mid level cloud across coastal parts of northern New South Wales and southern Queensland. A thick field of low level cloud and fog persists over western Victoria, and can be seen spreading outwards over the border into South Australia and New South Wales. The rest of the country is mostly cloud free.