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Brecon Beacons: latest pressure
Friday, 3 February 2012: dawn to dusk
Printable view Forecast issued: 1754 on Friday, 3 February 2012
Overview for Saturday
Starting bright but very cold. Cloud will thicken and lower during the day, with persistent snow followed by rain. Increasing winds.
| Hazards | Risk | Explanation |
|---|---|---|
| Blizzards | Low | Snowfall will be coupled with windspeeds of up to 35-40mph later on. |
| Heavy snow | Medium | Spells of snow will become increasingly heavy and persistent during the afternoon. |
| Storm force winds | No Risk | |
| Gales | No Risk | |
| Severe chill effect | High | Low temperatures coupled with rain, snow and brisk winds will lead to a high risk of windchill. |
| Persistent and extensive hill fog | Medium | Hill fog will steadily thicken and lower to valley floors by dusk, particularly in snowfall. |
| Thunderstorms | No Risk | |
| Heavy persistent rain | Medium | Snow will progressively turn to rain around dusk. |
| Strong Sunlight | Low | The east of the Park may see sunny spells at first giving glare over lying snow. |
key to hazards and forecast content
| Dawn to 0900 | 0900 to 1200 | 1200 to 1500 | 1500 to dusk |
 Sunny intervals |
 Sleet |
 Heavy snow |
Sleet |
| 0% | 30% | 70-90% | 70-90% |
Detailed mountain weather forecast: Brecon Beacons
Saturday
Weather
A crisp, bright but very cold start, with a little haze locally. Soon becoming cloudy from the west during the morning, with a band of intermittent rain, sleet and snow arriving from the west. This will push eastwards during the afternoon, increasingly turn to snow. Conditions will deteriorate markedly during the afternoon, with hill fog lowering, snow eventually giving near-zero visibility and brisk winds developing by dusk.
Visibility
Starting good, locally moderate in haze. Becoming poor in snowfall later, very poor in hill fog.
Hill fog
Periods around the higher summits thickening and lowering to 300m by dusk, occasionally valley floors in snowfall.
Maximum winds above 400m
Increasing to southwesterly 35-40mph
Temperature
| Valleys | Minus 8 Celsius locally, becoming plus 1 later. |
| 800 m | Minus 2 becoming plus 2 Celsius. |
| Freezing level | Generally ground level, rising to 300m by dusk. |
Sunday
Weather
A cold start with large areas of valley fog, particularly over remaining areas of lying snow. This will clear to a dry and bright morning, although rather cloudy. Cloud will lower during the afternoon to affect the higher reaches of the range later on, coupled with further spells of mostly light rain and sleet. Winds will start brisk northerly but ease during the day.
Visibility
Very poor in early valley fog. Otherwise good.
Hill fog
Early valley fog should clear during the morning. Patches around the higher summits possible later.
Maximum winds above 400m
Northerly 30mph, easing.
Temperature
| Valleys | Minus 2 becoming 5 Celsius. |
| 800 m | Zero Celsius |
| Freezing level | 800m. |
Outlook
Monday
A milder start than of late, although still with frost. Rather cloudy for much of the day with spells of rain and sleet likely. Light southwesterly winds. Freezing levels rising clear of the summits.
Tuesday
Again a rather cloudy day, with rain easing in situ to leave a drier afternoon. Moderate southerly winds. Freezing levels above the summits.
Wednesday
A dry and bright start, perhaps with some sunny spells, but becoming increasingly cloudy with spells of heavy rain later. Brisk and increasing southwesterly winds.
Neuadd Rain (near Pontsticill)
Altitude 353 metres
Rainfall measured at 15:00 Friday, 03 February 2012
- Last 24 hours 0.0 mm
- Last 48 hours 0.0 mm
- Last 72 hours 0.2 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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