Dark blue cloudy sky

What is Isobar?

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

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Glossary

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

A type of cloud consisting mostly of small particles such as ice particles.

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

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...

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

Local winds that blow from slopes to peaks as a result of the heating of the top slopes without being affected by general...

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

A large body of air having similar horizontal temperature and moisture characteristics.

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