Staring at the clouds during a tornado warning is a nerve-racking experience. Thunderstorms fill our skies with a tremendous variety of colours and textures as they lumber across the horizon. The ...

Quite a few Iowans spotted ominous, swirling cloud formations Thursday evening as storms moved through the state. These dramatic clouds are called "asperitas." Asperitas are well-defined, undulating ...

We have big-sky cloud formations to enjoy, ponder and maybe hide from. They range from interesting to downright scary, and it is fun to recall some clouds that made me skedaddle faster than greased ...