Dark blue cloudy sky

What is Bow Echo?

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale convective movements along a strong thunderstorm line.

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Glossary

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

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

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

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...

A very cold high pressure that originates over the Arctic Ocean.

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 polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...