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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The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...
Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...
A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...
A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...
The amount of water vapor present in the air, which can affect comfort levels and weather conditions.
An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...
The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.