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Do you know the difference between Tropical Cyclone and Extra-tropical Cyclone

Feb 2, 2018 17:58 IST
    Do you know the difference between Tropical Cyclone and Extra-tropical Cyclone

    The Cyclone is a weather phenomenon that consists of large scale air mass which rotates around a strong centre of low atmospheric pressure. The term “cyclone” is derived from a Greek word “cyclos’’ which means coiling of snake. It is characterised by inward spiralling winds that rotate about a zone of low pressure. The low atmospheric pressure region is the home of the cyclone. Hence, it can be tropical cyclones or extra tropical cyclone.

    What is Tropical Cyclone?

    A tropical cyclone is a generic term used by meteorologists to describe a rotating, organized system of clouds and thunderstorms that originates over tropical or subtropical waters and has closed low-level circulation. There are three types of Tropical cyclones: Tropical Depression; Tropical Storm; Tropical Cyclone.

    What is Tide, why it occurs and how it is important for human life?

    What is Extra-tropical Cyclone?

    The Extra-tropical Cyclone is used to refer to cold-core in the upper troposphere and often form along fronts in higher latitudes. It is developed in the mid and high latitude beyond tropics which causes abrupt changes in the weather conditions over area in the middle and high latitudes.

    Difference between Tropical Cyclone and Extra-tropical Cyclone


    Tropical Cyclone

    Extra-tropical Cyclone


    A low-pressure centre, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain.

    A large scale low pressure weather systems that occur in the middle latitudes of the Earth.


    It get intensified over warm tropical oceans and required temperature higher than 27° C, presence of the Coriolis force , small variations in the vertical wind speed, a pre-existing weak low- pressure area or low-level-cyclonic circulation and upper divergent above the sea level system.

    It get intensified any part of extratropical regions of the Earth (usually between 30° and 60° latitude from the equator), either through cyclogenesis or extratropical transition.


    It moves from east to west.

    It moves from west to east.

    Nature of Cyclone

    Violent storms

    Static not violent


    Warm Core

    Cold Core

    A cyclone can be named to any large system of winds that circulates about a centre of low atmospheric pressure in a counter clockwise direction north of the Equator and in a clockwise direction to the south. It never formed near equator because of the equator, the Coriolis force is zero and the wind blows perpendicular to the isobars. This is the only reason the low pressure gets filled instead of getting intensified.

    Basic Concepts in Geography

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