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Weather Reference - Clouds - Man Made
Location: London (Default) Lat: 51.5N Sunrise: 05:58BST
  Lon: 0E Sunset: 20:00BST

Man Made Clouds | Contrails | Disclaimer

Man Made Clouds

These formations do not occur naturally and are artificually produced.

Contrails

Contrail CloudThese formations do not occur naturally as it is artificially produced by high level aircraft operations.

All aircraft engines emit water droplets form their exhausts so when a plane flies through the upper levels of the troposphere, where the temperature is normally well below freezing these droplets immediate freeze to form ice crystals, creating an artificial cloud.

The surrounding air mass will contain little moisture, and the resulting cloud will be thin, short lived and invisible to someone on the ground. However if the surrounding air mass is close to saturation, the cloud produced will be broader and longer and may last for 30 minutes. It is this visible formation that is known as a contrail.

If a long lasting contrail is seen this can indicate the presence of high level moisture which could indicate the approach of a frontal system.

Disclaimer

All information is presented in good faith. We cannot accept any liability for any incorrect or incomplete information. You are strongly advised to seek clarification on any information presented. If you find any errors or omissions, please contact us to let us know so that we can put it right.

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