Includes all higher summits in the southern half of Wales, including highest point in Preseli Hills.
Brecon Beacons
Friday 4th December 2020
Last updated
Thursday 3rd December 2020 at
4:25 PM
Areas of snowfall will pivot in from the east to affect many areas of Scotland and Northern England through the day. Accompanied by upland gales giving severe wind chill for periods, but a substantial lull is likely S Pennines. Across Wales, snow showers later give way to persistent snow.
Severe wind chill. Snow showers, may become persistent later.
North or northwesterly, but very likely a lull for a time, but for periods risk 30-40mph high tops.
Prepare for arduous conditions and severe wind chill on higher terrain.
Snow showers, persistent later.
Occasional showers spreading from the northwest, may be frequent western areas, particularly Preseli hills. Snow or sometimes hail to low levels. Often sleety in valleys. Risk persistent rain/snow later in afternoon.
Breaks to some tops, later lowering in snow.
Varied: Banks of cloud covering higher tops at times, most common toward west Wales, below 600m around showers. Areas toward Black Mountains may be often clear. Later extensive should snow become persistent.
60%, later 30% in persistent snow.
Brief glimpses of sun. Visibility varied, often very good, but reduced markedly around showers.
-3C, may rise marginally. But feeling closer to -16C in direct exposure to strongest winds.
Terrain frozen into valleys in morning. Rising to 500-600m.
Brecon Beacons
Saturday 5th December 2020
Last updated
Thursday 3rd December 2020 at
4:25 PM
East or southeasterly, 15 to 25mph.
May impede ease of walking in places. Significant wind chill on high tops.
Generally dry
Rare snow flurries.
Risk fog banks east
Patches of cloud capping higher tops at times. Risk of some low level freezing fog banks, most likely east Wales, where may lift on to some hill slopes and linger.
60%
Occasional sun, mostly west. Visibility very good in places, but locally reduced around cloud banks.
-2C
Terrain widely frozen. Partial thawing in sunlight up to about 500m.
Brecon Beacons
Sunday 6th December 2020
Last updated
Thursday 3rd December 2020 at
4:25 PM
Low confidence in detail: North to northwest 10-15mph.
Mostly small.
Risk snow showers, rain lower slopes.
Clusters of showers may give snow, rain below 500m, on and off for a few hours. Much uncertainty over this though, may amount to very little and be often dry.
Fairly extensive
Fairly extensive cloud will very likely cover the hills. Bases varying, but at times though the day to lower slopes.
30%
Mostly cloudy. Visibility fairly murky and poor or very poor in snow/rain.
Around 0C
Around 800m.
Cold weather patterns are likely to prevail well into December. A period of constant freeze, at least on the Scottish Munros, but often near or below zero on many lower summits across Britain. Upland terrain becoming extensively snow covered as bands of precipitation circulate slowly around low pressure - substantial snowfalls likely across many uplands, and snow may well lie for periods to lower slopes. Wind speed and direction will vary considerably, occasionally gale force. An east or northeasterly common across northern Britain.