What are Cirrus Clouds?

Sept. 14, 2023

A new study has found a significant statistical correlation between thunderstorms occurring around the world and the formation of wispy cirrus clouds, which might increase global warming.

About Cirrus Clouds:

  • They are delicate, feathery clouds that are made mostly of ice crystals.
  • They are thin and wispy in appearance, often appearing as delicate, high-altitude filaments or strands.
  • Their wispy shape comes from wind currents, which twist and spread the ice crystals into strands.
  • They are usually white or have a light grey colour. In the daytime, they are whiter than any other cloud in the sky.
  • They are commonly known as "mare's tails" because they are shaped like the tail of a horse. 
  • Typically found at heights greater than 20,000 feet (6,000 metres), cirrus clouds are composed of ice crystals that originate from the freezing of supercooled water droplets.
  • They generally occur in fair weather and point in the direction of air movement at their elevation.

Other Main Cloud Types:

  • Cumulus clouds:
    • They are puffy clouds that look like puffs of cotton with a distinct white or light grey appearance.
    • They have a relatively short life cycle. They form, grow, and dissipate relatively quickly under stable atmospheric conditions.
    • Cumulus clouds that do not get very tall are indicators of fair weather. If they do grow tall, they can turn into thunderstorms.
    • The bottom of cumulus clouds are fairly close to the ground.
  • Stratus clouds:
    • They are low-level cloud formations that are characterised by their uniform and featureless appearance.
    • They look like flat sheets of clouds.
    • They typically cover the sky like a continuous, greyish or whitish blanket and are often associated with overcast or cloudy weather conditions.
    • They may stay in one place for several days.
    • They form at altitudes below 6,500 feet (2,000 metres) above sea level.

What is a thunderstorm?

  • A thunderstorm is a weather phenomenon characterised by the occurrence of lightning, thunder, heavy rain, and sometimes strong winds or hail.
  • It is a type of storm that develops when warm, moist air rises rapidly in an unstable atmosphere. It is the result of convection.
  • Thunderstorms can vary in intensity, size, and duration, ranging from isolated, short-lived events to long-lasting, widespread systems.

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