Ian Roulstone was interviewed for a special session on mathematics and weather, on the Groks Science Radio Show, to discuss his new book, Invisible in the Storm: The Role of Mathematics in Understanding Weather. The interview discusses the history of mathematics in weather forecasting, data assimilation, and the general applicability of those mathematics to other fields.  The interview first went out over radio in the Chicago area on 13 March.  It is now archived and the full interview can be listened to here.