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Not available Not available Not available Not available Not available Not available Not available 2200 on Wed 30 Jul 2014 0100 on Thu 31 Jul 2014 0400 on Thu 31 Jul 2014 0700 on Thu 31 Jul 2014 1000 on Thu 31 Jul 2014 1300 on Thu 31 Jul 2014 1600 on Thu 31 Jul 2014 1900 on Thu 31 Jul 2014 Night-time Thu 31 Jul 2014 Daytime Fri  1 Aug 2014 Night-time Fri  1 Aug 2014 Daytime Sat  2 Aug 2014 Night-time Sat  2 Aug 2014 Daytime Sun  3 Aug 2014 Night-time Sun  3 Aug 2014
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Updated: 1957 on Wed 30 Jul 2014
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Zoom map SW Scotland, Lothian Borders North West England North East England Yorkshire & Humber Wales East Midlands West Midlands East of England London & South East England South West England Northern Ireland Central, Tayside & Fife Grampian Highlands & Eilean Siar Orkney & Shetland Strathclyde

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Snowdonia: forecast weather

Wednesday, 30 July 2014: dawn to dusk

Printable view Forecast issued: 1436 on Wednesday, 30 July 2014

Overview for Thursday

Cloudy with patchy light rain, becoming brighter with 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 Low Extensive above 500m at first, patchy in showers later. Mainly on western slopes.
Thunderstorms Low Low risk of thundery showers through the afternoon.
Heavy persistent rain No Risk  
Strong Sunlight Low Moderate to high UV levels in 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
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Sunny intervals
Sunny intervals
10% 10% 20% 20%

Detailed mountain weather forecast: Snowdonia

Thursday

Weather

A cloudy start with extensive hill fog above 500m, particularly on western slopes, and some patchy light rain or drizzle. Cloud will gradually lift and break through the morning to bring some sunny spells, but showers are likely to develop through the afternoon. Showers could be heavy with a risk of thunder at times. Winds southwesterly light to moderate throughout and feeling warm in any sunny spells.

Visibility

Excellent, moderate in rain, poor in drizzle and very poor in hill fog.

Hill fog

Extensive above 500m at first, becoming patchy and related to showers later, mainly on western slopes.

Maximum winds above 500m

West to southwesterly 15-20mph, isolated 25mph.

Temperature

Valleys Plus 14 Celsius increasing plus 21 Celsius.
900 m Plus 10 Celsius.
Freezing level Above the summits.

Friday

Weather

A generally cloudy day with light showery rain and brighter spells at first. Cloud will increase throughout the day as more persistent and heavier rain approaches from the southwest, brining extensive low cloud and hill fog as low as 400m later in the day. Winds moderate southwesterly.

Visibility

Good, moderate in rain, poor in heavy rain, very poor in hill fog.

Hill fog

Becoming extensive above 400m later in the day, mainly on western slopes.

Maximum winds above 500m

Southwesterly 18-23mph.

Temperature

Valleys Plus 14 Celsius increasing plus 20 Celsius.
900 m Plus 10 Celsius.
Freezing level Above the summits.

Outlook

Saturday

Rain, heavy at times, and associated hill fog will gradually clear the range through the latter part of the day. Sunny spells and isolated showers will then follow.

Sunday

A much drier day than Saturday. There will be a mixture of sunshine and showers throughout the day. It will be breezy, but fell warm in any sunny spells when walking out of the wind.

Monday

Another day of sunshine and showers, but winds will be lighter than on Sunday. Feeling warm again in the sunshine, but tending to cloud over more later in the day.

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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