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Richard Hammond investigates how wind actually starts. He visits one of the windiest places on the planet, walks into the centre of a man-made tornado and creates a 10-metre high whirlwind - made of fire!

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.

Richard Hammond investigates the crucial role temperature plays in all weather. He builds a dust storm to discover how Saharan sand reaches the UK.

All weather, even the everyday stuff, is riddled with mystery and wonder, though you may not think so when caught without an umbrella. Find out how weather happens when the forces of wind, water and temperature collide, combine and even occasionally cooperate.