Dark blue cloudy sky

What is Blocking Pattern?

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather systems from moving through.

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Glossary

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The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

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

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

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...