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Updated: 1551 on Sat 19 Apr 2014
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Snowdonia: latest pressure

Saturday, 19 April 2014: dawn to dusk

Printable view Forecast issued: 0439 on Saturday, 19 April 2014

Overview for Saturday

Cold and clear with a frost and perhaps some patchy mist first thing. Plenty of sunshine through the day, but turning cloudier later.

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 No Risk  
Thunderstorms No Risk  
Heavy persistent rain No Risk  
Strong Sunlight Medium Plenty of sunshine, especially during the morning.

key to hazards and forecast content

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

Detailed mountain weather forecast: Snowdonia

Saturday

Weather

A cold start with a frost and temperatures locally below freezing. Any early mist patches should quickly clear to leave a largely sunny morning with temperatures soon recovering. There may be some patchy cloud on eastern slopes however. During the afternoon it will turn cloudier but still with some good sunny spells, especially in the west. Feeling pleasant in the sunshine while walking, but chilly in the breeze.

Visibility

Very good, but poor in any mist or patchy hill fog.

Hill fog

Well broken at around 500m at first, mainly on eastern slopes, soon dispersing and lifting above the summits.

Maximum winds above 500m

East or southeasterly 15-20mph.

Temperature

Valleys Plus 1 Celsius rising to plus 13 Celsius.
900 m Zero rising to plus 4 Celsius.
Freezing level Around 800m rising above the summits.

Sunday

Weather

A dry start, but clouding over through the early hours will hill fog developing and becoming quite extensive through the morning. There remains a large amount of uncertainty at this stage, but outbreaks of rain may spread from the southeast during the afternoon, particularly across the south of the park. Strong northeasterly winds developing with a risk of gales over the summits later.

Visibility

Good, becoming moderate or poor in rain, very poor in hill fog.

Hill fog

Becoming broken at around 500m through the early hours then extensive during the afternoon with occasional patches above 200m.

Maximum winds above 500m

Northeasterly 25-35mph with gusts approaching 50mph.

Temperature

Valleys Plus 2 Celsius rising to plus 12 Celsius.
900 m Plus 3 Celsius rising to plus 5 Celsius.
Freezing level Above the summits.

Outlook

Monday

Some brighter spells, but overall rather cloudy with showers which may be heavy and thundery at times, perhaps merging into a longer spell of rain at times. Feeling cool in moderate to strong northeasterly winds and where rain persists. Extensive hill fog likely, particularly in any persistent rain.

Tuesday

Lighter winds than recent days leading to some fog patches in the valleys at first as well as over hills. Some bright spells, but there will still be heavy showers.

Wednesday

Some drier brighter spells initially after any early fog clears, but then another unsettled spell of weather with outbreaks of rain spreading northeastwards across the park. Perhaps drier later in the day. Temperatures around normal but breezier than Tuesday.

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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