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Brecon Beacons: latest infra-red satellite

Sunday, 20 April 2014: dawn to dusk

Printable view Forecast issued: 0238 on Sunday, 20 April 2014

Overview for Sunday

Some dry spells, but overall rather cloudy with outbreaks of rain later. Cooler and windier than of late.

Hazards Risk Explanation
Blizzards No Risk  
Heavy snow No Risk  
Storm force winds No Risk  
Gales Low Northeasterly winds may reach 45-50mph during the afternoon.
Severe chill effect Medium Strong northeasterly winds combined with cloud and rain will make it feel cold at height.
Persistent and extensive hill fog High Extensive fog developing above around 500m.
Thunderstorms Low A low risk of thunder in any heavier spells of rain.
Heavy persistent rain Low Persistent rain during the afternoon will make conditions slippery underfoot.
Strong Sunlight No Risk  

key to hazards and forecast content

Weather summary and probability of precipitation for Sunday
Dawn to 0900 0900 to 1200 1200 to 1500 1500 to dusk
Cloudy
Cloudy
Light rain
Light rain
Light rain
Light rain
Light rain
Light rain
20% 30% 40% 60%

Detailed mountain weather forecast: Brecon Beacons

Sunday

Weather

Cloud will increase from the east leading to extensive hill fog, especially on northern and eastern slopes. Much of the morning will stay dry but a few showers are possible. During the afternoon outbreaks of rain will spread from the south and east, becoming more persistent and heavy later. Northeasterly winds will increase through the day, perhaps reaching gale force over exposed summits, making walking difficult with a distinct wind chill.

Visibility

Good becoming moderate in rain and poor in heavy rain. Very poor in hill fog.

Hill fog

Cloud becoming extensive and persistent above around 500m through the morning, with patches down to 200m, especially on east and north facing hills later in the day. Cloud may lift for a time around the middle part of the day.

Maximum winds above 400m

Northeasterly 45-50mph.

Temperature

Valleys Plus 2 Celsius rising to plus 13 Celsius.
800 m Plus 3 Celsius rising to plus 7 Celsius.
Freezing level Above the summits.

Monday

Weather

Another unsettled day with showers or longer spells of rain which could be heavy at times bringing a risk of hill fog. However, there will also be some limited drier, brighter spells. Brisk east or southeasterly winds will continue taking the edge off temperatures.

Visibility

Good to moderate with rain or showers, locally poor in heavy rain and very poor in hill fog.

Hill fog

Periods of broken cloud above 400-500m, but occasionally as low as 200m in heavy showers and at first.

Maximum winds above 400m

East or southeasterly 30-40mph

Temperature

Valleys Plus 6 Celsius rising to plus 16 Celsius.
800 m Plus 5 Celsius rising to plus 7 Celsius.
Freezing level Above the summits.

Outlook

Tuesday

With lighter winds than recent days there could be some fog patches in the valleys to start the day. These clearing to allow some bright spells but also heavy showers, possibly thundery.

Wednesday

Some fog patches again possible at first, but these soon clearing as south or southeasterly winds increase as a spell of rain moves northeastwards across Wales. Some brighter spells following the rain with showers.

Thursday

Another unsettled day with a mix of bright or sunny spells and showers which could be heavy at times. Winds will be fairly light so there could be some fog patches to clear in the morning. Temperatures around average or a little above in any sunshine.

Neuadd Rain (near Pontsticill)

Altitude 353 metres

Rainfall measured at 03:00 Sunday, 20 April 2014

  • Last 24 hours 0.0 mm
  • Last 48 hours 0.0 mm
  • Last 72 hours 0.0 mm

Rainfall data provided by the Environment Agency. The Met Office is not responsible for content provided by third parties and may remove this data without warning.

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Weather warnings for Wales

Weather forecast for Wales

The Enhanced Mountain forecast for Brecon Beacons has been discontinued. All forecast information for these locations can be found in the standard Mountain forecast above.

North East England West Midlands Grampian South West England Central, Tayside & Fife Northern Ireland North West England East of England Highlands & Eilean Siar Strathclyde Wales East Midlands SW Scotland, Lothian Borders London & South East England Yorkshire & Humber

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