I shot this time lapse video from our place yesterday as a severe thunderstorm system moved across Melbourne. It was shot at an interval of 12 seconds, over a four-hour period. About 20 seconds into the movie you can see where the cold front moves across the sky from left to right. As it does, it condenses water from the warm, muggy air that’d been sitting over us for several days, forming a very dynamic band of cloud that looks like the underside of a breaking wave. Even in real-time it was one of the most dramatic cloud formations I’ve ever watched, moving and developing extremely quickly. A very exciting evening.