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Brecon Beacons: forecast pressure
Saturday, 18 May 2013: dawn to dusk
Printable view Forecast issued: 0533 on Saturday, 18 May 2013
Overview for Saturday
A dry and bright day across the area, with plenty of sunny spells and feeling pleasantly warm.
| 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 | No Risk | |
| Thunderstorms | No Risk | |
| Heavy persistent rain | No Risk | |
| Strong Sunlight | Medium | Sunny spells at times throughout the day will give a moderate risk of sunburn. |
key to hazards and forecast content
| Dawn to 0900 | 0900 to 1200 | 1200 to 1500 | 1500 to dusk |
 Mist |
 Sunny intervals |
Sunny intervals |
Sunny intervals |
| 0% | 0% | 10% | 0% |
Detailed mountain weather forecast: Brecon Beacons
Saturday
Weather
A largely dry and bright day with good spells of sunshine developing and feeling pleasantly warm. Northwesterly winds will strengthen slightly through the day and also become westerly.
Visibility
Generally good or very good, but very poor in early valley fog.
Hill fog
Some isolated patches of valley fog and low cloud at first, soon clearing.
Maximum winds above 400m
Northwesterly 10-20mph.
Temperature
| Valleys | Plus 3, becoming plus 15 Celsius. |
| 800 m | Plus 6 Celsius. |
| Freezing level | Above the summits. |
Sunday
Weather
Rather cloudy start with some low cloud and mist and fog patches in the valleys. Otherwise, mainly dry on Sunday with patchy cloud and some brighter interludes at times. Best of the suuny spells during the afternoon period.
Visibility
Generally good or very good, but very poor in fog.
Hill fog
Some mist and fog patches through the valley floors at first. Well broken cloud at 500 metres, giving isolated patches of hill fog at first. Lifting above summits through the morning.
Maximum winds above 400m
Northwesterly 10-15mph, becoming 15-25mph through the afternoon.
Temperature
| Valleys | Plus 6, becoming plus 13 Celsius. |
| 800 m | Plus 5 Celsius. |
| Freezing level | Above the summits. |
Outlook
Monday
Remaining generally dry with patchy cloud and some sunny spells. Best of the brightness will be across the west. Strengthening northerly winds through the day.
Tuesday
Another rather cloudy and largely dry day, but with more limited sunny spells in the west and perhaps some patchy light rain across the east. Feeling cool in the northerly wind.
Wednesday
A largely dry day, with more in the way of brightness compared to Tuesday, but still the chance of some patchy light rain at times. Northwesterly winds making it feel cool for the time of year.
Neuadd Rain (near Pontsticill)
Altitude 353 metres
Rainfall measured at 03:00 Saturday, 18 May 2013
- Last 24 hours 0.0 mm
- Last 48 hours 2.0 mm
- Last 72 hours 2.0 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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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.
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