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Super-cooled water droplets can be encountered:
  • A
    only in winter above 10 000 ft.
  • B
    in winter only in high clouds.
  • C
    only in winter at high altitude.
  • D
    at any time of the year.

SUPERCOOLED WATER DROPLET is a water droplet still in liquid state at a temperature below 0ºC. They can be encountered above the freezing level at any time of year.

Supercooled water droplet size is controlled by cloud type and the temperature => As temperature decreases the water droplets evaporate thus reducing their size.

  • Large supercooled water droplets: Between 0°C and -20°C, found in Cumulus, Cumulonimbus and Nimbostratus clouds.
  • Small supercooled water droplets:
- Upper levels of Cumulus, Cumulonimbus and Nimbostratus clouds: -20°C to -40°C
- Stratus, Stratocumulus, Altostratus and Altocumulus clouds: 0°C to -40°C

  • Below -40°C only very tiny supercooled water droplets can exist.

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