I was nearly at work when I saw this amazing cloud formation and detoured onto Rte 50 to get a better view. I asked my Facebook friend, Adam Caskey, who's a weather man on ABC 7 News what it meant, and was told it was heralding in a cold front. It only lasted about 3 minutes or so and then flattened out but another came up behind it. The clouds moved so fast that within 5 or so minutes, this cool spectacle had finished and we were left with a grey sky. It had seemed like a sci-fi scene for a while. Adam showed my photo on the evening news, woo hoo!