BBC monthly outlook
Summary
Unsettled this week, then drier and calmer
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Wednesday 3 April—Sunday 7 April
A brief return to winter
The UK is currently under the grip of a significant early spring cold spell, with many areas waking up to an air frost on Wednesday morning, with sleet and snow falling to low levels in northeast England and eastern Scotland for a time. There will be further wintry showers with hail, thunder and lightning, across Wales and central England today, with more general cloud and wintry precipitation lingering in the north, while there will be gales in western and northern Scotland. On Friday, many central and eastern areas will be dry with sunny spells, although it will be rather cloudy and wet in the west and far north.
Temperatures will climb closer to average for many areas, however, much of Britain should remain dry with banks of cloud and some sunny spells on Saturday, although cloud and rain will tend to linger across SW England and Wales for much of the day, with a few spots of rain for Scotland too. It will be a touch milder for most over the weekend. By Sunday, an east to northeasterly airflow will become established, and there should be a lot of dry but quite cloudy weather, with a few spots of rain or light showers still possible.
Monday 8 April—Sunday 14 April
Largely settled, but cloudy at times
In stark contrast to this week, next week will be dominated by high pressure building to the north and northeast of the UK. This will maintain an easterly airflow during the first half of the week, although this won't bring any cold air from Scandinavia. In fact, temperatures will be about normal for the time of year, and there will be a lot of dry weather too, with the winds often light. However, areas of low cloud may move across the country from the North Sea at times, and these could be thick enough to produce a little patchy rain or occasional light showers. The sunniest and driest weather is most likely to be found across central and eastern Britain.
There are indications that high pressure could briefly extend further southwest across the UK for a time around the middle of the week, allowing one or two colder and clearer nights to develop, although largely dry conditions are still expected. Towards the end of the week, an area of low pressure will slide southeast to the west of Britain, and this could push one or two weak fronts into southern and southwestern areas, where some patchy rain or showers could develop. Many central and northern areas should remain dry with occasional banks of cloud and spells of sunshine.
Monday 15 April—Sunday 28 April
High pressure giving a warm end to April
Around the middle of April, there may still be unsettled and showery days across southern Britain, as low pressure remains close for a time. This is not expected to last, as high pressure is expected to re-establish itself from the east or northeast, bringing a return to drier and calmer conditions once again. There may be some large diurnal temperature variations - with rather warm and sunny afternoons, but chilly nights developing under relatively clear skies. Occasional banks of low cloud or mist may drift into eastern coasts from the North Sea, limiting daytime temperatures here.
During the final week of the month, a number of different sources continue to support a rather 'blocked pattern', with high pressure near to or situated directly over the UK. This should allow lengthy periods of dry and calm weather for many areas. It is likely to be warm, with temperatures above normal for the time of year, although the nights could still be quite chilly at times. Towards the end of the month, wetter and windier conditions may return to northern Scotland, as low pressure develops to the north.
Next Update
Will April will end on a dry and warm note, or could low pressure return as we head into May?
https://www.bbc.co.uk/weather/outlook