What is Arctic Air?

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

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

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

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

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

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...