Hello how may I help you? I have a question about world records Which record do you have a question about What was the biggest recorded cloud in history? when you see biggest to do you mean tallest or widest or heaviest Anything that's biggest. I don't care of the metric used in measurement Are you talking about the biggest cloud ever measured in the USA or in the world? Whatever That would be the stratus 2 Cloud it was measured over 1000 miles long Oh wow thank you! Byr