A Reddit user recently posted a video showing an unusual streak in the sky, sparking a wave of speculation online. The video, shared in the r/weather subreddit, shows what appears to be a thick, ...

A woman in Calgary, Alberta, Canada, saw a strange, wavy cloud in the sky on ... they can also form ahead of thunderstorm shelf clouds of severe thunderstorms in rare instances, as shown in ...

A woman in Calgary, Alberta, Canada, saw a strange, wavy cloud in the sky on Feb. 22, 2025, and took to X, formerly known as Twitter, to crowdsource an answer. "Does anyone know what is happening here ...