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Brecon Beacons: latest pressure
Saturday, 18 May 2013: dawn to dusk
Printable view Forecast issued: 1730 on Saturday, 18 May 2013
Overview for Sunday
Dry with sunny periods throughout the day once any early mist and valley fog has cleared.
| 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 periods likely throughout the day bringing a 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 |
| 0% | 0% | 0% | 0% |
Detailed mountain weather forecast: Brecon Beacons
Sunday
Weather
Light winds and clear periods during the early hours mean that it will be rather chilly at first and there is likely to be some mist and fog in the valleys. This will clear during the first half of the morning and the rest of the day will be dry with sunny periods. Winds will increase and will become northwesterly in the afternoon, and this will make it feel a little cooler again to end the day.
Visibility
Generally good, but only moderate in early morning mist.
Hill fog
Some mist and fog in the valleys at first, otherwise nil.
Maximum winds above 400m
15 mph northwesterly in the afternoon.
Temperature
| Valleys | Plus 5 Celsius rising to plus 15 Celsius. |
| 800 m | Between plus 6 and plus 9 Celsius. |
| Freezing level | Above the summits. |
Monday
Weather
A much cloudier day than Sunday although with some bright intervals. Low cloud will give extensive periods of hill fog over the summits during the day, and cloud will be thick enough to produce outbreaks of light rain and drizzle. It will also be a breezy day, especially at height, and will feel cold.
Visibility
Generally moderate, but poor or very poor in hill fog and rain.
Hill fog
Hill fog above 600 metres will be extensive at times.
Maximum winds above 400m
20 mph northerly or northeasterly. Occasional gusts to 30 mph.
Temperature
| Valleys | Plus 10 Celsius, perhaps rising to plus 15 degrees Celsius in brighter intervals. |
| 800 m | Plus 10 Celsius |
| Freezing level | Above the summits. |
Outlook
Tuesday
A rather cloudy day with hill fog and a chance of outbreaks of rain and drizzle, mainly on northern slopes. Periods of hill fog are likely. Fresh northerly winds will affect all areas so it will feel cool.
Wednesday
A mixed day of sunny spells and occasional but locally sharp showers. Fresh northerly winds will continue to affect the National Park so it will feel chilly.
Thursday
Strong north or northwesterly winds will continue throughout the day, and it will feel cold at altitude with the freezing level just above the summits. There will be some sunny periods, especially in the west, but with scattered showers in the east, some of these heavy with a risk of hail.
Neuadd Rain (near Pontsticill)
Altitude 353 metres
Rainfall measured at 15:00 Saturday, 18 May 2013
- Last 24 hours 0.0 mm
- Last 48 hours 0.4 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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