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A microburst phenomenon can arise in the…

  • A
    downdraught of a cumulonimbus at the initial stage.
  • B
    downdraught of a cumulonimbus at the mature stage.
  • C
    updraught of a cumulonimbus at the growth stage.
  • D
    updraught of a cumulonimbus at the mature stage.

Refer to figures.
As a Cumulonimbus cloud becomes mature, strong downdrafts occur, usually associated with precipitation in the form of Rain, hail or Virga. These downdrafts can be very powerful, with vertical winds of 6000 ft per minute. When a strong downdraft, referred to as a downburst or microburst, hits the surface, the wind diverts horizontally outwards. Downdrafts ahead of a cumulonimbus cloud push warm surface air upwards.

Note: Initial stage is characterized by continuous updrafts.

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