First broadcast: on BBC One WestLatest broadcast: on BBC Four
Richard Hammond investigates the role water plays in the weather. He tries to weigh a cloud, finds out how rain could crush a car and starts an avalanche. Show more
First broadcast: on BBC One Scotland HDLatest broadcast: on BBC Four HD
Richard Hammond investigates how wind actually starts. He walks into the centre of a man-made tornado and visits one of the windiest places on Earth. Show more
First broadcast: on BBC One HDLatest broadcast: on BBC Four HD
Richard Hammond investigates the crucial role temperature plays in all weather. He builds a dust storm to discover how Saharan sand reaches the UK. Show more