Brecon Beacons Forecast
Viewing Weather Forecast for Monday 24th April 2017
Also includes all higher summits in southern half of Wales.
Forecast last updated on Monday 24th April 2017 at 7:07am
Summary for all mountain areas
A cold front passing southwards brings a marked change to Arctic air. Heavy showers of snow and hail spread from the north, merging into constant precipitation for several hours in Scotland. Winds up to gale force. Whiteout and severe wind chill Scottish mountains.
Headline for Brecon Beacons
Increasingly cold. Rain on and off, amounts small; later hail.
How windy? (On the summits)
West to northwesterly, 20 to occasionally 25mph, strengthening by evening to 30 or 35mph.
Effect of wind on you?
Fairly small most of the day, but walking increasingly impeded on higher tops later in day.
A little rain
Frequently dry, although showery rain occasionally, perhaps locally for an hour Late afternoon or evening, turning to snow or hail from north.
Cloud on the hills?
May be extensive on higher tops
Cloud on higher areas after dawn will lift to clear most summits for a few hours from late morning. From the north, the base will drop again during afternoon, particularly on more western summits.
Chance of cloud free summits?
Sunshine and air clarity?
Occasional sunshine and often excellent visibility.
How Cold? (at 750m)
5C; dropping top 3C from north late afternoon, or -1C by dusk. Late in day, where directly exposed to strongest wind, feeling like -10 Celsius.
Above the summits most of the day, but dropping quickly to 600-700m by evening.
All mountain areas of Britain from Tuesday 25th April 2017
An Arctic air mass encompasses the British Isles bringing winter-like conditions during midweek. Freezing levels will be very low. Widespread snow and hail showers, sometimes frequent, or near constant northern Scotland. Significant wind chill. Less cold from about Thursday onward as winds back westerly. Frontal systems moving in from the Atlantic are likely to bring periods of rain and upland gales heading into the May Day weekend, although a gradual improvement may develop.