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Friday, 10 February 2012: dawn to dusk
Printable view Forecast issued: 0354 on Friday, 10 February 2012
Cloudy and wet in the morning. Becoming colder in the afternoon with only occasional light rain, possibly sleet or snow at height.
| Hazards | Risk | Explanation |
|---|---|---|
| Blizzards | No Risk | |
| Heavy snow | No Risk | |
| Storm force winds | No Risk | |
| Gales | No Risk | |
| Severe chill effect | Medium | Moderate risk of a severe wind chill throughout the day. |
| Persistent and extensive hill fog | High | Extensive hill fog to low levels during the morning, lifting and breaking by afternoon. |
| Thunderstorms | No Risk | |
| Heavy persistent rain | Low | Persistent rain in the morning may become heavy at times. |
| Strong Sunlight | No Risk |
key to hazards and forecast content
| Dawn to 0900 | 0900 to 1200 | 1200 to 1500 | 1500 to dusk |
![]() Light rain |
![]() Light rain |
![]() Light rain |
![]() Dull |
| >90% | 70% | 40% | 20% |
Cloudy and wet in the morning with outbreaks of locally heavy rain affecting Snowdonia. Becoming drier in the afternoon with only occasional light rain, although this may fall as sleet or snow above 400 metres as temperatures drop. Cloud lifting and breaking to allow some brighter intervals in the east of the National Park.
Very poor in fog, and moderate in rain during the morning. Becoming moderate to good in the afternoon as rain clears.
Extensive hill fog to the valley floors at first, this lifting and breaking with periods of hill fog above 700 metres in the afternoon.
Southeasterly 25mph
| Valleys | Plus 4 Celsius |
| 900 m | Plus 4 Celsius falling to zero Celsius by evening. |
| Freezing level | Above the summits at first but slowly descending to 400 metres by evening. |
Chance of some valley fog at first, but once this clears it will be a largely dry but very cold day across Snowdonia, with some sunny spells. Temperatures will be well below freezing at first and will only slow rise to just above freezing in the afternoon. As a result, there is likely to be widespread ice which could prove challenging unless adequately equipped.
Excellent.
Nil.
Southerly 25mph
| Valleys | Minus 4 Celsius becoming plus 1 Celsius. |
| 900 m | Minus 2 Celsius |
| Freezing level | Between sea-level and 200 metres. |
Generally rather cloudy with hill fog affecting the peaks. Chance of a little light rain, this perhaps falling as sleet or snow over the higher parts of the National Park with the freezing level down to 700 metres.
A similar day to Sunday, with fairly widespread cloud and occasional rain, this falling as sleet or snow at height. The freezing level will again be around 700 metres. Chance of gale force northwesterly winds in the afternoon.
A cold day with temperatures struggling to rise above freezing. There may be a few showers, with these falling as snow above 300 metres. Strong to gale force northerly winds will affect the summits.
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