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The Morning Glory cloud is a rare meteorological phenomenon observed in Northern Australia's Gulf of Carpentaria. A Morning Glory cloud is a roll cloud that can be up to 1000 kilometres long, 1 to 2 kilometres high, and can move at speeds up to 60 kilometres per hour. The Morning Glory is often accompanied by sudden wind squalls, intense low-level wind shear, a rapid increase in the vertical displacement of air parcels, and a sharp pressure jump at the surface...

A POTD is an acronym for "Photo of the Day", "Picture of the Day", "Post of the Day" or "Poll of the Day". It is a term most commonly used by online digital photography communities as an honor to outstanding photos that are selected daily from among that community's membership. They can either be tagged as POTD or displayed in a special page on that site...