A large rotating band of cloud extending downward from the base of a thunderstorm before a tornado forms is a ____ cloud.
A)Mammatus
B)cumulonimbus
C)hook
D)mesocyclonic
E)wall

Question

Quizplus · Accepted Answer

A wall cloud is a large rotating band of cloud that extends downward from the base of a thunderstorm, indicating the area of strongest updraft and often preceding tornado formation.

A Large Rotating Band of Cloud Extending Downward from the Base