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Updated: 1357 on Fri 18 Apr 2014
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Snowdonia: forecast temperature

Friday, 18 April 2014: dawn to dusk

Printable view Forecast issued: 0423 on Friday, 18 April 2014

Overview for Friday

A cold start, followed by a dry day with long, warm sunny spells.

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 Some patchy cloud at 500m, burning off through the morning.
Thunderstorms No Risk  
Heavy persistent rain No Risk  
Strong Sunlight Medium Long sunny spells throughout the day.

key to hazards and forecast content

Weather summary and probability of precipitation for Friday
Dawn to 0900 0900 to 1200 1200 to 1500 1500 to dusk
Sunny intervals
Sunny intervals
Sunny
Sunny
Sunny
Sunny
Sunny
Sunny
0% 0% 0% 0%

Detailed mountain weather forecast: Snowdonia

Friday

Weather

A cold start with frost and some patchy valley mist. It will then be a dry day with long spells of warm sunshine and light winds. Some patchy low cloud for a time through the morning, clearing by lunch time. It will feel pleasantly warm when walking.

Visibility

Excellent or very good, very poor in any hill fog.

Hill fog

Patchy cloud from 500m at first. Lifting and clearing through the morning.

Maximum winds above 500m

Northerly 15-20mph at first.

Temperature

Valleys Plus 2 Celsius becoming plus 13 Celsius.
900 m Plus 0 Celsius becoming plus 4 Celsius.
Freezing level 900m soon rising above summits.

Saturday

Weather

A cold start after clear skies overnight. Another dry day with plenty of warm sunshine throughout, through becoming slightly hazy later. Winds remaining mainly light and easterly resulting in some patchy cloud at first. Conditions will be pleasantly warm while walking and care should be taken in the sunshine.

Visibility

Excellent, reducing moderate to good in haze later. Very poor in any hill fog.

Hill fog

Patchy cloud at 500m at first, soon clearing.

Maximum winds above 500m

Easterly 15mph, gusting 25mph at times.

Temperature

Valleys Plus 1 Celsius becoming plus 14 Celsius.
900 m Plus 4 Celsius.
Freezing level Above summits.

Outlook

Sunday

A fine a dry start with cloud soon increasing, bringing hill fog and rain through the afternoon. Winds also strengthening from the northeast. It will be noticeably colder that previous days. Freezing level close to the summits at first.

Monday

A dull, cloudy day with rain at times throughout. There will be some brighter spells at times too, but hill fog will be extensive above 500m. Winds remaining fresh to strong from the northeast, making walking difficult at times and also keeping temperatures down. Care should be taken.

Tuesday

Drier and less windy than on Monday. Still a generally cloudy day with extensive hill fog for the highest peaks and spells of rain or drizzle throughout the day. However, there may be a few more brighter spells.

Latest: 07/04/2014 14:24 Yr Wyddfa/Snowdon: Some small patches of snow above 900m.

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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