BBC monthly outlook
Summary
Staying unsettled and cold at times
Saturday 2 February—Sunday 10 February
Becoming a little milder but staying unsettled
The current cold spell will continue this weekend. Saturday will be a chilly day and although many parts of the country will see some winter sunshine, there will be a few wintry showers too. The showers will be mainly in the north and east, although western Wales and South West England could see the odd shower too. Saturday night will be largely dry with long clear periods, so it will become cold with a widespread frost expected.
Sunday will start dry, clear and cold, but a front will move eastwards across the country during the day. This will bring outbreaks of rain to many areas, and perhaps some sleet or snow. Snow is most likely on high ground in the north of the country, chiefly over Scotland and northern England but cannot be completely ruled out in other areas.
The weather will remain changeable next week as weather systems move in from the Atlantic. These systems will bring showers and more widespread rain to many areas of the country, although there will be some drier and calmer spells of weather too. The start of next week is likely to be chilly but temperatures should pick up to around normal for the time of year, perhaps locally a little above normal. This means that snow is more likely to be confined to high ground in the north of the country. We could still have some chilly nights, although not as cold as we've seen in the last seven days.
Monday 11 February—Sunday 17 February
Becoming a little less mild
In our last update, we mentioned that there was a chance of some colder weather arriving around the middle of February. The reason for this was because we expected high pressure currently over the east and north-east of Europe to start to extend westwards towards the UK, with cooler easterly winds potentially reaching our shores. Whilst this scenario still looks possible, it now seems more likely a little later in the month, with high pressure and cold air slower to spread westwards.
However, we do think that after a relatively mild spell, it will become a little cooler towards the middle of the month. This is mainly due to an expected reduction in the broadly westerly winds coming in from the Atlantic. In this case, it would also become drier. It should be stressed that there is quite a lot of uncertainty for this period of the February, as there is low confidence in the timing of the transition from unsettled westerlies to more of a blocked, settled pattern. We could potentially see low pressure systems continuing to push in from the west, with the weather remaining unsettled, wet and windy but mild. There is only a small risk of anything substantially colder at this stage.
Monday 18 February—Sunday 3 March
Chance of colder weather setting in
It is likely that the final third of February will see a cold spell developing across the UK. This is most likely to be due to a 'blocked' pattern across northern Europe, this preventing our usual mild flow in from the Atlantic, with an increased chance of easterly or north-easterly winds developing. All areas of the country look colder than normal, and many areas will be drier and less windy than normal. There will be an enhanced risk of snow to lower levels and overnight frosts.
There is some uncertainty over the duration and magnitude of this cold spell, and it seems likely that it will be a relatively short spell of cold weather, with things perhaps returning to nearer normal for the start of March.
Whilst a spell of cold weather is the most likely story, there is an alternative scenario which suggests that we could see the Atlantic maintaining some influence on the weather. This would mean that it wouldn't be as widely cold - temperatures would be nearer normal - and there would be a reduced risk of snow. However, it would probably still be cooler than average for the time of year.
Next Update
We should be able to offer a little more detail regarding the intensity and duration of the cold spell expected later this month.
https://www.bbc.co.uk/weather/outlook
Originally Posted by: Gavin D