How heavy is a cloud?

When it rains, it can often rain for a long time – we’ve all got wet being outside in the rain for too long! This rain comes from clouds in the sky, however this must mean that a cloud must be made of all of the rain water which falls on us – that’s a lot of water! So how much does that make them weigh?

This fantastic video by Robert Krulwich from NPR explains how heavy is a cloud is, and how heavy a hurricane is.

Robert Krulwich works on radio, podcasts, video, the blogosphere. He has been called “the most inventive network reporter in television” by TV Guide. Robert is a Science Correspondent for NPR. His NPR blog, “Krulwich Wonders” features drawings, cartoons and videos that illustrate hard-to-see concepts in science.