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Updated: 0838 on Fri 10 Sep 2010
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Brecon Beacons: latest pressure

Friday, 10 September 2010: dawn to dusk

Printable view Forecast issued: 0500 on Friday, 10 September 2010

Overview for Friday

Cloudy with rain for much of the day, some of this heavier with strong southwesterly gusts. Persistent hill fog down to low levels, especially on southwest-facing slopes.

Hazards Risk Explanation
Blizzards No Risk  
Heavy snow No Risk  
Storm force winds No Risk  
Gales Medium Fifty mph gusts are possible through the day on exposed summits and ridges.
Severe chill effect No Risk  
Persistent and extensive hill fog High Persistent hill fog is likely down to low levels throughout the day.
Thunderstorms No Risk  
Heavy persistent rain High Rain is likely to be persistent and heavy at times, especially on southwest-facing slopes.
Strong Sunlight No Risk  

Key to Hazards

Weather summary and probability of precipitation for Friday
Dawn to 0900 0900 to 1200 1200 to 1500 1500 to dusk
Light rain
Light rain
Light rain
Light rain
Heavy Rain
Heavy Rain
Heavy Rain
Heavy Rain
70% 90% 90% 90%

Detailed mountain weather forecast: Brecon Beacons

Friday

Weather

Cloudy with rain at times for much of the day. This rain may occasionally turn heavy, with strong and gusty southwesterly winds in exposure.

Visibility

Generally moderate or good, occasionally poor in the heaviest rain. Fog affecting southwest-facing slopes.

Hill fog

Persistent hill fog down to around 300 metres throughout the day, mainly affecting southwest-facing slopes.

Maximum winds above 400m

Southwesterly 50 mph

Temperature

Valleys Plus 14 Celsius rising to plus 18 Celsius
800 m Plus 12 Celsius
Freezing level Above the summits

Saturday

Weather

Early rain and hill fog will clear away eastwards during the morning to leave sunny spells and scattered showers for the remainder of the day. Showers likely to be on the heavy side at times. Winds easing.

Visibility

Moderate at first in the remainder of rain, becoming generally good later, although still moderate in showers. Fog at first on southwest-facing slopes.

Hill fog

Persistent hill fog at first, perhaps as low as 300 metres, lifting to around 700 metres and becoming more occasional later in the morning.

Maximum winds above 400m

Southwesterly 35 mph, easing westerly 25 mph in the afternoon.

Temperature

Valleys Plus 15 Celsius rising to plus 19 Celsius
800 m Plus 10 Celsius
Freezing level Above the summits

Outlook

Sunday

After the early clearance of hill fog, Sunday should be dry and bright with sunny spells in gentle winds. Good or very good visibility. Feeling warm in sunshine.

Monday

A mostly dry day with hazy sunny spells and variable amounts of cloud. A small chance of the odd spot of rain at times from thicker cloud. Good or very good visibility. Moderate westerly or southwesterly winds.

Tuesday

Cloudier than preceding days, with a little rain around, perhaps brightening up later. Visibility generally good. Moderate westerly winds.

Neaudd Rain (near Pontsticill)

Altitude 353 metres

Rainfall measured at 03:00 Friday, 10 September 2010

  • Last 24 hours 1.4 mm
  • Last 48 hours 5.8 mm
  • Last 72 hours 7.8 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 have been issued 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