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A thunderstorm sweeps over the Melbourne suburb of Carrum Downs by Flavio Bonicelli.Lightning illuminates a cumulonimbus cloud over Corio Bay, Victoria by James Collier. See SWNS story SWWEATHER: This incredible set of photographs yesterday (Tues) showed nature at its wildest and most beautiful. The Bureau of Meteorology and Australian Meteorological and Oceanographic Society organises a competition each year for the best weather pictures. And its 2013 calendar is one of its most dramatic yet with lightning bolts, dust storms and enormous clouds creating dramatic One of the star moments was captured by amateur photographer James Collier after he witnessed a thunderstorm in March

Pictures of the week: From Obama's big win to a tiny tortoise

Here's the pick of the pics from around the world this week.

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