Hello how may I help you? Is this the internet information bot? Yes, I am. Can you tell me the biggest recorded cloud ever? Yes, do you mean the tallest or the widest? Either. A single cloud or a cluster of clouds A cluster of clouds. over the United states or the world? The world OK, The tallest cluster of clouds was 2132 feet tall and is was recorded over brazil. the widest cluster of clouds was recorded over China and it was 3 miles wide.