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Friday, 10 September 2010: dawn to dusk
Printable view Forecast issued: 0500 on Friday, 10 September 2010
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 |
| Dawn to 0900 | 0900 to 1200 | 1200 to 1500 | 1500 to dusk |
![]() Light rain |
![]() Light rain |
![]() Heavy Rain |
![]() Heavy Rain |
| 70% | 90% | 90% | 90% |
Cloudy with rain at times for much of the day. This rain may occasionally turn heavy, with strong and gusty southwesterly winds in exposure.
Generally moderate or good, occasionally poor in the heaviest rain. Fog affecting southwest-facing slopes.
Persistent hill fog down to around 300 metres throughout the day, mainly affecting southwest-facing slopes.
Southwesterly 50 mph
| Valleys | Plus 14 Celsius rising to plus 18 Celsius |
| 800 m | Plus 12 Celsius |
| Freezing level | Above the summits |
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.
Moderate at first in the remainder of rain, becoming generally good later, although still moderate in showers. Fog at first on southwest-facing slopes.
Persistent hill fog at first, perhaps as low as 300 metres, lifting to around 700 metres and becoming more occasional later in the morning.
Southwesterly 35 mph, easing westerly 25 mph in the afternoon.
| Valleys | Plus 15 Celsius rising to plus 19 Celsius |
| 800 m | Plus 10 Celsius |
| Freezing level | Above the summits |
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.
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.
Cloudier than preceding days, with a little rain around, perhaps brightening up later. Visibility generally good. Moderate westerly winds.
Altitude 353 metres
Rainfall measured at 03:00 Friday, 10 September 2010
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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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