Assertion: cumulonimbus cloud | /r/HasProperty | formed
Facets:
Source sentences:
text: They are formed beneath 20,000 ft. and are relatively close to the ground.
text: cumulonimbus is formed when a rising warm air cools, its water condenses.
text: Cumulonimbus clouds are formed when a low pressure center develops with a high pressure system around it.
text: When atmospheric instability begins to create a storm, the cumulonimbus cloud is formed.
text: They are formed beneath 20,000 ft. and are relatively close to the ground.