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What is Closed Row (Cut Off Low)?

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation patterns. These systems are surrounded by high-pressure areas and can result in persistent weather conditions such as heavy rain, thunderstorms, or cold temperatures in a localized area.

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Glossary

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

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

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

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

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

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

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

The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...

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