UK's potential winter freeze is switched for warm weather following erratic jet stream

dailystar.co.uk:

Temperatures in the UK are expected to hit 21C in parts of the country next week despite forecasts predicting chilly weather.

A southerly plume has pushed back northerly winds, leading to unexpected warm conditions.Jim Dale, meteorologist for British Weather Services, said: “What we now expect is the exact opposite of what we thought would happen just a few days ago, but this is not unusual for this time of year when dramatic changes in models can make the weather extremely difficult to forecast.READ MORE: UK Weather: Freakish 500-mile 'African plume' brings 23C Indian summer for Halloween“The jet stream is very erratic and unpredictable, recently moving to the north and encouraging weather fronts into the UK while secondary low-pressure systems form in the Atlantic.“This is what we are seeing next week, with a low to the south-west of the UK, and this will pull in mild air from the south.”Mr Dale added that Wednesday will experience the highest temperatures with parts of south-eastern Britain likely to hit 21C.He said: “Wednesday is looking like delivering the mildest temperatures, although this will be in the south, while northern regions will always be much cooler.“In the meantime, there will be dribs and drabs of rain, although not enough to solve the ongoing drought issues after the summer.Unsettled weather such as heavy rain and winds could persist into the start of next week with the Met Office stating weather fronts are expected to drift across the UK.Meteorologist Alex Deakin said: “Our weather continues to chop and change certainly for the next five days.“Weather fronts will drift across the UK, but there will be some fine days to be had.To stay up to date with all the latest news, make sure you sign up to one.