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Brecon Beacons: latest infra-red satellite
Monday, 20 May 2013: dawn to dusk
Printable view Forecast issued: 0523 on Monday, 20 May 2013
Overview for Monday
Initially dry and bright, but cloud increasing with a few showers in the morning. Becoming brighter in the afternoon.
| 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 | Low | Long periods of hill fog above 600 metres are likely during the morning, breaking up later. |
| Thunderstorms | No Risk | |
| Heavy persistent rain | No Risk | |
| Strong Sunlight | Medium | Occasional lengthy cloud breaks may develop later with some strong sunshine coming through. |
key to hazards and forecast content
| Dawn to 0900 | 0900 to 1200 | 1200 to 1500 | 1500 to dusk |
 Cloudy |
Cloudy |
 Sunny intervals |
Sunny intervals |
| 30% | 30% | 0% | 0% |
Detailed mountain weather forecast: Brecon Beacons
Monday
Weather
A dry and bright start, but cloud soon increasing with a few showers through the morning. Then a generally dry and fine day, with cloud lifting and breaking somewhat, allowing warm sunny spells to develop through the afternoon. Winds should be light and from the north or northwest.
Visibility
Generally good, but moderate in rain and very poor in hill fog.
Hill fog
Periods of hill fog above 600 metres during the morning, lifting somewhat during the afternoon.
Maximum winds above 400m
North or northwesterly 20 mph.
Temperature
| Valleys | Plus 6 Celsius becoming 19 degrees Celsius during afternoon. |
| 800 m | Plus 7 Celsius becoming 12 degrees Celsius. |
| Freezing level | Well above the summits. |
Tuesday
Weather
A rather cloudy and fairly mild morning again with some spots of light rain, and perhaps some hill fog capping the peaks. The cloud should thin and break again during the afternoon, becoming largely dry, and gradually becoming a little fresher as winds strengthen from the northwest.
Visibility
Generally very good once low cloud has lifted. Very poor in any hill fog.
Hill fog
Periods of hill fog probable during the morning above 600 metres, slowly lifting with only patches over the higher summits during the afternoon.
Maximum winds above 400m
Northerly 25 mph.
Temperature
| Valleys | Plus 12 Celsius becoming 17 Celsius during the afternoon. |
| 800 m | Plus 12 Celsius becoming 9 Celsius during the afternoon. |
| Freezing level | Well above the summits. |
Outlook
Wednesday
Some morning cloud and light outbreaks of rain possible, but becoming less cloudy and fresher during the afternoon with a strengthening northwesterly wind. Freezing levels should remain above the summits, but cooling-off quite markedly over high peaks and ridges later in the afternoon as colder air arrives.
Thursday
Cool, dry and fine with sunny spells and gusty north or northwesterly winds through the day, and freezing levels just above the summits.
Friday
Similar to Thursday, largely dry with sunny spells and perhaps some occasional cloud. Winds will be moderate and northerly, with freezing levels just above the summits.
Neuadd Rain (near Pontsticill)
Altitude 353 metres
Rainfall measured at 03:00 Monday, 20 May 2013
- 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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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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