Saturday 18 Dec - Monday 27 Dec

Through this period, high pressure, already across southern areas, is expected to build further north, pushing the remaining wind and rain away. Here any rain will be light, giving a much drier second half to December for all and winds expected to be predominantly calm. Although rather cloudy at first, cloud amounts should reduce through the period, especially in the south and southeast. Temperatures near average to start, and locally mild in the north, although they will tend to become colder in time for Christmas, especially in southern areas. As a result, the risk of frost and fog increases, the fog slow to clear through the mornings, and perhaps lasting all day in some places.

Tuesday 28 Dec - Tuesday 11 Jan

It is likely to remain settled for the final week of 2021, with an increasing risk of frost and fog for Christmas and New Year. Any unsettled spells are most likely for the northwest, with occasional stronger winds, and some showers or longer spells of rain. Temperatures are expected to be around average, but milder in the north, and colder in the south at times, where frost is most likely. Heading deeper into January there is expected to be a gradual shift towards more changeable conditions, especially in the northwest, and turning milder again too.

https://www.metoffice.gov.uk/

good old automated bbc app giving me sleet on 25th !

and now light snow all day… 

Oh hello :

Monday 20 Dec - Wednesday 29 Dec

 At the start of this period it will be settled and predominantly dry with large amounts of cloud, though cloud may well be thick enough for the odd spot of drizzle at times. In general, cloud amounts will tend to reduce with time, with a corresponding increase in the risk of overnight fog and frost, which may be slow to clear by day in some areas. Towards the middle of the period, there is an increasing chance of more unsettled and windier weather affecting the UK, with rain, and perhaps snow, possible for some places. Temperatures will generally be near to below normal, perhaps rather cold in the south, feeling chilly where any fog persists, and locally mild in the north and northwest.

Oh hello :

Monday 20 Dec - Wednesday 29 Dec

 At the start of this period it will be settled and predominantly dry with large amounts of cloud, though cloud may well be thick enough for the odd spot of drizzle at times. In general, cloud amounts will tend to reduce with time, with a corresponding increase in the risk of overnight fog and frost, which may be slow to clear by day in some areas. Towards the middle of the period, there is an increasing chance of more unsettled and windier weather affecting the UK, with rain, and perhaps snow, possible for some places. Temperatures will generally be near to below normal, perhaps rather cold in the south, feeling chilly where any fog persists, and locally mild in the north and northwest.

 

Compared to Yesterdays update:

Sunday 19 Dec - Tuesday 28 Dec

The Met Office are still going for a colder and drier end to 2021 in their 16-30 day outlook: 

Thursday 30 Dec - Thursday 13 Jan

Interesting comments from Marco and Ian F on Twitter. Marco confident of milder and unsettled by Xmas. Ian replying saying he is much less confident. Uncertainty all around lol.

Stav mentioned cold air more likely to win but didn't sound convinced!

Sean Batty on the STV weather after the news mentioning possible snow on Christmas day and boxing day up here 👀👀

Yes please!

Interesting comments from Marco and Ian F on Twitter. Marco confident of milder and unsettled by Xmas. Ian replying saying he is much less confident. Uncertainty all around lol.

I wouldn't necessarily use the word confident and he made clear he is talking about the Christmas period as a whole. Here are the tweets so people can decide for themselves.

Worth stressing of course by Christmas 🎄 I'm referring to the period and not just the big day itself

That's currently looking a bit of a transition day with less cold air edging in from W/SW..slower changes further N/E of course..wintry mix possible as transition takes place https://t.co/gvGx7AqPeU

— Marco Petagna (@Petagna) December 15, 2021

Marc P saying an 'interesting' Christmas coming up as LP's from the SW try and budge the cold air.

Stav at 1330 showed the cold air firmly in place by Christmas Day across the UK with Easterly winds 🙂

Must have some faith in the ECM evolution 

Met update pretty much a rinse and repeat from yesterday 

That tells me they don't expect the first slider to get in too far :

Wednesday 22 Dec - Friday 31 Dec