STORMS, sprites, fog, frost and curious clouds: just some of the highlights of the Australian Weather Calendar.
Some of this country's most spectacular weather phenomena are captured and explained in the Bureau of Meteorology's 2020 calendar, with the theme"Weather safety for all Australians".
Now in its 36th year, the Australian Weather Calendar is published jointly by the Bureau and the Australian Meteorological and Oceanographic Society.
Bureau chief executive officer Dr Andrew Johnson said competition for inclusion in this year's edition was as tough as ever, with hundreds of amateur and professional photographers submitting their snaps and a final 13 pictures going into print.
"I am proud to say that our 2020 calendar includes images from every state and territory, as well as Antarctica, so we're covering Australia and beyond, from the tropics to the frozen continent," Dr Johnson said.
"It features everything from fascinating cloud formations, such as the incredible morning glory cloud above Burketown in northwest Queensland, to an intricate close-up of a frosted leaf near Canberra.
"Every page provides an insight into both the striking visuals and the danger posed by severe weather conditions, so it perfectly fits our weather safety message of 'Know your weather. Know your risk'.
"A feature of this year's calendar is the range of clouds, from pileus and shelf to mammatus and lenticular formations.
"Each image is accompanied by a description of how nature made it happen."
The calendar can be ordered from the Bureau's online shop at shop.bom.gov.au, by phone on 1300 798 789 or purchased at selected Bureau offices.
Prices are $15 for the small version and $17 for the traditional A2 size (plus P&H) and can be sent to friends and family anywhere in the world.