What is Clear?
Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility. Clear sky. In meteorology, this term is also used when the cloud cover is less than 1/8 during the day or at the observation hour.
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An instrument for measuring atmospheric pressure.
The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...
A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...
The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...
Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...
A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...
A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...
The amount of water vapor present in the air, which can affect comfort levels and weather conditions.
A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...