Brecon Beacons
Includes all higher summits in the southern half of Wales: the Bannau Brycheiniog / Brecon Beacons National Park, southern Cambrian Mountains and highest Preseli hills.
Saturday's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Heavy rain
Near-constant heavy rain, sometimes torrential over the mountains, very wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Mild
Temperatures +5C or above on higher summits. Comfortable temperatures on lower terrain, but feeling cool if exposed to breeze higher up, especially if stationary. Pack extra layers.
Flooding
Fast-flowing rivers and streams. Some routes may be impassable due to flooding.
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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Heavy rain
Near-constant heavy rain, sometimes torrential over the mountains, very wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Mild
Temperatures +5C or above on higher summits. Comfortable temperatures on lower terrain, but feeling cool if exposed to breeze higher up, especially if stationary. Pack extra layers.
Flooding
Fast-flowing rivers and streams. Some routes may be impassable due to flooding.
Viewing Forecast For
Brecon Beacons
Saturday 23rd November 2024
Last updated
Fri 22nd Nov 24 at
4:00PM
Summary for all mountain areas
Severe weather widely with storm-force upland winds; heavy snow over the Highlands giving sustained blizzard conditions to lower elevations. A rapid switch from snow to rain up to high tops for northern England, already by dawn in Wales - here prolonged heavy rain with flooding likely.
Headline for Brecon Beacons
Severe gales. Heavy rain lasting all day, flooding.
How windy? (On the summits)
South turning southwesterly 50 to 60mph, at times 70mph higher tops; powerful gusts to lower slopes.
Effect of the wind on you?
Difficult conditions on many hills, hard to maintain balance; any mobility hardly possible on exposed high terrain.
How Wet?
Heavy rain, flood risk
Snowfall on tops before dawn, but changing into heavy rain up to tops by first light. Rain continues to be intense much of day, may ease a little later, but further heavy rain evening into night. Very wet underfoot, streams rising quickly to be in spate, some flooding.
Cloud on the hills?
Hills covered extensively
Hills fully covered, very likely all day, to lower slopes in south and west-facing areas.
Chance of cloud free summits?
Almost nil
Sunshine and air clarity?
Overcast. Visibility very poor.
How Cold? (at 750m)
Rising from 0C before dawn, soon to +5C in morning, then +10C afternoon onward.
Freezing Level
300-600m around dawn inland, but soon rising rapidly to well above all summits.
Viewing Forecast For
Brecon Beacons
Sunday 24th November 2024
Last updated
Fri 22nd Nov 24 at
4:00PM
How windy? (On the summits)
Southwesterly 50 to 60mph, but south-facing mountains often 65-70mph.
Effect of the wind on you?
Very difficult conditions. Easily blown over and requires crawling. Significant wind chill.
How Wet?
Frequent or persistent rain
Persistent heavy rain across all mountains, particularly on south and southwest facing slopes. Clearing to the east in the afternoon, though showers will follow.
Cloud on the hills?
Extensive low cloud
Extensive cloud associated with heavy rain throughout the day. Cloud base likely to stay low around 600m, often lower on south/west facing hills.
Chance of cloud free summits?
Below 10%
Sunshine and air clarity?
Overcast, poor visibility in the rain
How Cold? (at 750m)
3C, slightly warmer around dawn. Feeling like -10 to -15C in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Monday 25th November 2024
Last updated
Fri 22nd Nov 24 at
4:00PM
How windy? (On the summits)
Southwest turning westerly, 45 to 60mph.
Effect of the wind on you?
Difficult conditions across exposed higher terrain. Significant wind chill.
How Wet?
Showery with hail
Showery rain, may fall as sleet or wet snow on very highest summits. Heavy bursts with hail, particularly nearer to western coasts, chance isolated lightning.
Cloud on the hills?
Varied over the tops
Cloud base rapidly changing, mostly confined to hills above 600 to 800m, lowest over western hills and in showers. Some higher breaks furthest east.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Rare glimpses of sun mainly east. Visibility briefly good, though slight haze; suddenly very poor due to precipitation.
How Cold? (at 750m)
3C. Wind chill feeling like -10 to -15C.
Freezing Level
Above the summits.
Planning Outlook
A powerful area of low pressure continues to influence all areas Sunday into Monday, bringing sustained gales from lower hills upward, storm-force on higher mountains. After a rapid period of thaw in all areas late Saturday, by Sunday-Monday the Scottish high tops are back just below freezing point. Frequent showery rain, or snow on the Munros, most persistent in the west. Into midweek, higher pressure tries to expand over Britain bringing drier conditions, with temperatures nearer the seasonal average compared to the current very cold spell. Periods of rain and milder southerly air later in the week - above freezing to all tops. Early December shows signs of chillier northerlies returning.