Wall Clouds
Wall clouds, also known as low-hanging thunder cells, are generally an indication that there is violent weather closeby. These clouds form when thunder cells get so heavy from carrying so much water that they fall into the lower portions of the atmosphere. These clouds can potentially be the cause of ground tornados, and when the storm strikes, there is a higher chance that the ground and surrounding objects will be struck by lightning. If you see a cloud like this getting close to the ground, turn tail and run as fast as you can in the opposite direction. Usually, these clouds don’t move very far in the sky unless they become active tornadoes that get pushed by the wind.