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Cold-core low

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Cold core funnel cloud

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Cold Core Funnel Cloud Explainer

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The Cold Core

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Steep Lapse Rates/Cold Core Upper Level Low: March 26, 2022: Ft. Smallwood Park, Maryland

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Big upper level low

A cold-core low, also known as an upper level low or cold-core cyclone, is a cyclone aloft which has an associated cold pool of air residing at high altitude within the Earth's troposphere. It is a low pressure system that strengthens with height in accordance with the thermal wind relationship. If a weak surface circulation forms in response to such a feature at subtropical latitudes of the eastern north Pacific or north Indian oceans, it is called a subtropical cyclone. Cloud cover and rainfall mainly occurs with these systems during the day. Severe weather, such as tornadoes, can occur near the center of cold-core lows. Cold lows can help spawn cyclones with significant weather impacts, such as polar lows, and Von Karman Vortices. Cold lows can lead directly to the development of tropical cyclones, owing to their associated cold pool of air aloft or by acting as additional outflow channels to aid in further development.
    • Characteristics 

    • Importance to cyclones within the subtropics and mid-latitudes 

    • Importance to tropical cyclones