Which of the following cloud types are most likely to produce light to moderate icing when they are not subject to orographic lifting and consist of supercooled cloud droplets?
Refer to figure.
Icing in Altostratus and Altocumulus clouds can be expected to be light to moderate.
"Altostratus and cirrocumulus" / "Stratocumulus and cirrostratus". INCORRECT.
- Cirrus clouds are high altitude clouds made of ice crystals that are generally found above 20,000 feet above ground level (AGL). Since they form in stable air, they usually don't pose a risk as far as turbulence or icing (water in liquid state must be present in order for icing to occur).
"Stratus and cumulonimbus".
- This option can be ruled out because cumulonimbus will give moderate to severe icing.
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