Gary McArthur, Member 5,353, captured this two hour timelapse video of the sky over Tasmania on 27th January 2025.  He told us “it shows the mesmerising effect of  shadows from an upper altocumulus floccus layer projected onto a lower layer of stratocumulus. The added interest is that both layers are moving in OPPOSITE directions. It amazes me how much we can learn about clouds from time lapse – the only way you could ever detect this effect…”