Assertion: cumulonimbus cloud's top | /r/HasProperty | cold
Facets:
value: very
type: DEGREE
value: often
type: DEGREE
Source sentences:
text: The top of a cumulonimbus cloud is very cold and icy, whereas the cloud itself contains a lot of water droplets.
text: Remember, it takes an unstable atmosphere with a sharp decrease in temperature with height to form a cumulonimbus cloud, so the tops of these clouds are often exceptionally cold.