By Paul Homewood
On 3rd January, the Met Office issued a report about the wet and stormy weather during December.
Amongst their conclusions were:
1) It had been the stormiest month since 1993.
2) The jet stream had been sitting in the right place to bring those storms to the UK.
3) The jet stream has been particularly strong over the previous few weeks. This was partly due to particularly warm and cold air being squeezed together in the mid-latitudes, where the UK sits. This could be due to nothing more than the natural variability which governs Atlantic weather.
4) However, looking at the broader picture, there is one factor which could increase the risk of a stormy start to winter and this is called the quasi-biennial oscillation (QBO for short).
This is a cycle, discovered by the Met Office in 1959, which involves a narrow band of fast…