Have you ever heard someone describe the weather as "ceiling unlimited" and wondered what exactly that meant?

'Ceiling: unlimited' means that from a specific location, at the current time, the sky is basically cloud free.

Ceiling is a term used to describe the base of the lowest cloud layer in the sky and it's one piece of information that both pilots and meteorologists use when describing the current weather conditions and a vital tool for both fields.

It is part of the code we use to translate weather conditions from weather stations on the ground is called METAR, which is designed so that everyone around the world can understand the same code.