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Updated: 2332 on Wed 23 Apr 2014
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Snowdonia: latest wind

Wednesday, 23 April 2014: dawn to dusk

Printable view Forecast issued: 1541 on Wednesday, 23 April 2014

Overview for Thursday

Mist and fog lifting and clearing then plenty of sunshine and scattered, heavy showers.

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 Medium Valley mist and fog will lift during the morning to give a period of hill fog.
Thunderstorms Low Heavy showers may turn thundery in the afternoon.
Heavy persistent rain No Risk  
Strong Sunlight Medium A risk of sunburn in prolonged sunny spells.

key to hazards and forecast content

Weather summary and probability of precipitation for Thursday
Dawn to 0900 0900 to 1200 1200 to 1500 1500 to dusk
Mist
Mist
Mist
Mist
Dull
Dull
Sunny intervals
Sunny intervals
0% 0% 0% 10%

Detailed mountain weather forecast: Snowdonia

Thursday

Weather

After a chilly night with clear skies there will be some valley mist and fog. This will lift during the morning to bring a period of hill fog, however once this clears there will be plenty of warm sunshine. A few showers, perhaps heavy and thundery are possible during the afternoon bringing some cloud across the highest summits. Any showers will fade during the evening to leave a fine end to the day.

Visibility

Poor or very poor in mist and fog but steadily improving to become very good by afternoon, but reduced to moderate in showers.

Hill fog

Valley mist and fog will lift during the morning to give a period of hill fog. By midday cloud will be clear of most summits with some patches around 600-800m during showers.

Maximum winds above 500m

Southeasterly 10mph.

Temperature

Valleys Plus 2 Celsius rising to plus 14 Celsius.
900 m Plus 3 Celsius rising to plus 5.
Freezing level Above the summits.

Friday

Weather

A dry start with some mist and fog patches initially, then some brighter spells developing as this lifts. However there will be a fair amount of cloud throughout with showers likely at times, perhaps heavy and thundery. Later in the day a spell of heavier, more persistent rain may spread from the southeast, but there remains low confidence in this. Light winds throughout and feeling pleasant in any sunshine.

Visibility

Poor or very poor in mist and fog, but improving to good or very good. Moderate in showers, becoming poor in nay heavy showers or rain later.

Hill fog

Mist and fog in the valleys will lift into hill fog during the morning, becoming occasional at around 500m, especially on eastern slopes.

Maximum winds above 500m

Southeasterly 10mph.

Temperature

Valleys Plus 3 Celsius rising to plus 13 Celsius.
900 m Plus 5 Celsius.
Freezing level Above the summits.

Outlook

Saturday

A mostly cloudy, unsettled day with showers or more persistent bands of rain crossing the park with strong southeasterly winds. Hill fog will blanket the hills.

Sunday

Another changeable day, although perhaps not quite as breezy or as cloudy as Saturday. However, there will be still be scattered, heavy showers. Hill fog will still be quite extensive with some mist and fog in the valleys too.

Monday

Light winds will allow for some morning mist and fog, then some brighter spells developing but also some showers.

Observations

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Weather warnings for Wales

Weather forecast for Wales

The Enhanced Mountain forecast for Snowdonia has been discontinued. All forecast information for these locations can be found in the standard Mountain forecast above.

North East England West Midlands Grampian South West England Central, Tayside & Fife Northern Ireland North West England East of England Highlands & Eilean Siar Strathclyde Wales East Midlands SW Scotland, Lothian Borders London & South East England Yorkshire & Humber

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