Winds, Storms and Cyclones
The moving air is known as wind. Winds are caused by the variation in air pressure. The pressure applied by the air on the bodies every time in all the directions is known as air pressure.
The increased wind speed is accompanied by a reduced air pressure. Air moves from the region of high pressure towards the region of low pressure. The resistance offered by air to a moving object is known as air resistance.
Air has a property to expand on heating and contracts on cooling. The uneven heating of air results in generation of wind currents. This phenomenon of uneven heating makes the winds to blow from poles to the equator as equator is hotter than the poles. The same phenomenon is responsible for monsoon winds which carry water to rain. High intensity winds may raise thunderstorms and cyclones.
Thunderstorm is an event of swift movement of the falling water droplets along with rising air, lightning and sound. A cyclone is a large wind system rotating inwards to an area of low atmospheric pressure formed due to a very low pressure system with high speed winds revolving around them. The factors like wind speed and its direction, temperature and humidity contribute to the development of cyclones.
Continuous heavy rainfall results in flooding situations. Strong winds damages houses, communication systems, trees, etc.
Advance technologies like radar and satellites issue a 48 hours advanced cyclone warning called cyclone alert or cyclone watch.