The UK MetOffice have just released a weather warning covering most of the UK as snow and ice returns.
As we head through today cold air will filter south eastwards with snowfall in Scotland and a sharp frost overnight for most of the UK.
Tomorrow will see similar conditions with snow showers in the North followed by a UK wide overnight frost.
By Friday the risk of snowfall extends into Northern England with some significant accumulations possible in parts of the North West.
All of this marks the start of a cool/colder spell of weather which could last well into February as the effects of the Sudden Stratospheric warming in late December bend and buckle the jet stream allowing cold air to plunge southwards at various stages.
Many in the media have been reporting that the UK is heading for a bitter cold spell with large amounts of snow and FREEZING days with temperatures failing to hit positive figures.
So why have they been talking about this recently?
The answer lies with the Stratosphere.
From roughly the 23rd of December the Stratosphere has seen a significant rise in temperatures and this warming is expected to last into January.
This can lead to wobble of the usual Zonal winds pushing West to East and instead we see a wavy pattern. This can then allow High pressure to build at higher latitudes which increases the chance of a cold North or Easterly air flow over the UK.
All of this can take 2/3 weeks from the date of the Sudden Stratospheric Warming event to influence the weather we see and thus the Met Office is predicting a colder spell from the 3rd week in January.
However whilst this can be the outcome and the likelihood of cold weather is increased it by no means guarentees that it will happen and as of now no immediate threat is being predicted by the weather models.