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Brecon Beacons: latest infra-red satellite

Thursday, 18 September 2014: dawn to dusk

Printable view Forecast issued: 1724 on Thursday, 18 September 2014

Overview for Friday

Low cloud, hill fog and heavy, possibly thundery showers to start. All this should gradually clear through the morning with a drier and brighter end to the day.

Hazards Risk Explanation
Blizzards No Risk  
Heavy snow No Risk  
Storm force winds No Risk  
Gales No Risk  
Severe chill effect No Risk  
Persistent and extensive hill fog High Widespread hill fog down to 200-400 metres, gradually clearing through the day.
Thunderstorms High Heavy thunderstorms are likely during the early hours and through the morning.
Heavy persistent rain Low Showers are likely to turn heavy and could merge into longer spells of rain, mainly early on.
Strong Sunlight Low Potential for sunburn in any prolonged sunny spells in the afternoon.

key to hazards and forecast content

Weather summary and probability of precipitation for Friday
Dawn to 0900 0900 to 1200 1200 to 1500 1500 to dusk
rain
rain
rain
rain
Cloudy
Cloudy
Cloudy
Cloudy
60% 60% 20% 20%

Detailed mountain weather forecast: Brecon Beacons

Friday

Weather

There will be widespread hill fog at first. Some heavy showers are also likely and these could be thundery at times. Conditions should improve through the day as the cloud gradually lifts and the showers should ease, although a few showers are still possible later.

Visibility

Generally moderate at first but poor in the showers and very poor in the hill fog. Becoming moderate to good through the day.

Hill fog

Widespread hill fog down to 200-400 metres, gradually lifting through the morning.

Maximum winds above 400m

Northeasterly 20 mph.

Temperature

Valleys Plus 13 Celsius rising to plus 18 Celsius.
800 m Plus 13 Celsius rising to plus 15 Celsius.
Freezing level Well above the summits

Saturday

Weather

Another cloudy start with low cloud, hill fog and some showery rain possible. It should improve through the day with some bright spells by mid-afternoon.

Visibility

Generally moderate at first but poor in the showers and very poor in the hill fog. Becoming moderate to good through the day.

Hill fog

Widespread hill fog down to 300-500 metres, gradually lifting through the morning.

Maximum winds above 400m

Northeasterly 25 mph.

Temperature

Valleys Plus 13 Celsius rising to plus 18 Celsius.
800 m Plus 13 Celsius.
Freezing level Well above the summits.

Outlook

Sunday

A few mist and fog patches around but less than previous mornings. A few showers cannot be ruled out early on but these should quickly clear. Then a largely fine day with some bright or sunny spells.

Monday

Again some patchy mist or fog to start but this soon clearing to leave a fine day with some decent bright or sunny spells.

Tuesday

Again some patchy mist or fog to start but this soon clearing to leave a fine day with some decent bright or sunny spells. Perhaps turning cloudier and breezier later.

Neuadd Rain (near Pontsticill)

Altitude 353 metres

Rainfall measured at 15:00 Thursday, 18 September 2014

  • Last 24 hours 0.0 mm
  • Last 48 hours 0.4 mm
  • Last 72 hours 0.4 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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