Hello how may I help you? I need some record information I'd be happy to help. What are you looking for? What is the biggest cloud that has ever been recorded By biggest, do you mean the tallest? Or the widest? The one that covered the longest amount in length? The widest please The widest cloud ever measured approximately 6 and 1/2 miles wide. Wow. That's huge Yes, it was. Can I find any more information for you? No, that's it. Thanks You're welcome. Have a good day.