In case you've seen a purple sky in Charlottetown recently, don't panic. It's been there for quite a while, says a cannabis producer whose greenhouses use a particular type of lighting.

Clouds play a starring role in the background of our lives, so much so that it’s noteworthy when we get to gawk at the spectre of a crystal clear sky. Every cloud is worthy of a gaze to admire ...

The wispy thin clouds are just forming and have super-cooled water droplets or ice crystals of about the same size. The sun’s rays hit a few droplets at at time, creating a rainbow effect.

WATCH: As hurricane Dorian veered north, Floridians received an unexpected sight on Wednesday when the sky turned purple, as a result of what's called "scattering" and is a common development ...