Australia: Huge flying saucer during storm 13-Oct-2014

I just received these two interesting photos of a huge flying saucer in the sky above Rosemeadow in NSW, Australia. They were taken during storm on Monday, 13th October 2014.
What do you think this strange object was? You can leave your comment below the post. The photos were submitted to my Facebook page.
Here’s the first photo (click on the image to enlarge):

And here’s the second one, which I guess was taken before the previous one: