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Updated: 0641 on Mon 30 Jun 2014
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Snowdonia: forecast cloud

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
Sunny intervals
Sunny intervals
10% 10% 20% 20%

Detailed mountain weather forecast: Snowdonia



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.


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.


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



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.


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.


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



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.


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.


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.



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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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