Watch this incredible footage of mammatus clouds forming over the sunset. Liz Legge from Indianapolis, USA, captured the rare event as the clouds passed through her neighbourhood. Despite over four ...

An ominous green sky is often associated with severe weather, but not every storm causes the sky to change colors.

DON'T MISS: Weirdest cloud in Canadian history ... which is precisely why the sky is blue. At sunset, however, sunlight travels a much longer distance through the atmosphere.

After storms rolled through late Thursday afternoon, residents across Northeast Wisconsin saw some interesting cloud patterns ...