Lenticular Clouds Lenticular clouds, with their distinctive lens shape, often hover over mountain ranges like alien ...

Formed by cold air sinking down, mammatus clouds are usually seen when there is turbulence in a cumulonimbus cloud. US President Donald Trump has paused tariffs of 25% on Canadian goods for 30 ...

Mammatus clouds generally form in the most unstable cumulonimbus clouds. When that happens, they are often a sign of a particularly strong storm. More: Traveling for Independence Day? Here's when ...