When will Storm Ciaran hit and what makes it a bomb cyclone?

The strongest winds from Storm Ciaran are expected to hit south England on the morning of 2 November, and the storm may set a record for the lowest air pressure recorded in 200 years

​The strongest winds from Storm Ciaran are expected to hit south England on the morning of 2 November, and the storm may set a record for the lowest air pressure recorded in 200 years The strongest winds from Storm Ciaran are expected to hit south England on the morning of 2 November, and the storm may set a record for the lowest air pressure recorded in 200 years