What is Arctic Air?

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...

A cloud of irregular appearance, composed of irregular cloud fragments.

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...