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Updated: 1005 on Tue 19 Mar 2013
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Snowdonia: latest visual satellite

Saturday, 2 August 2014: dawn to dusk

Printable view Forecast issued: 0203 on Saturday, 2 August 2014

Overview for Saturday

A wet and dull day, with extensive cloud and heavy outbreaks of rain at times. Hill fog likely, especially in the west. Also turning increasingly breezy.

Hazards Risk Explanation
Blizzards No Risk  
Heavy snow No Risk  
Storm force winds No Risk  
Gales Low Winds may gust to 50mph at times over the summits later in the day.
Severe chill effect No Risk  
Persistent and extensive hill fog Medium Extensive at 200m in west, to 500m in east. Many Summits shrouded leading to difficult navigation.
Thunderstorms Low Low risk of very isolated thunder in heavier bursts of rain
Heavy persistent rain High Outbreaks of rain turning persistent and heavy. Treacherous conditions underfoot.
Strong Sunlight No Risk  

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
Heavy Rain
Heavy Rain
Heavy Rain
Heavy Rain
Heavy Rain
Heavy Rain
Light rain
Light rain
90% 80% 80% 70%

Detailed mountain weather forecast: Snowdonia

Saturday

Weather

Outbreaks of rain will continue across Snowdonia through the morning, turning persistent and heavy in places. These will be most frequent over the western slopes with some large rainfall totals likely. Widespread hill fog is also expected. Whilst the occasional drier and brighter interval is possible, especially in the east, these are likely to be few and far between. It will also gradually turn breezier especially over western peaks.

Visibility

Generally moderate to poor all day in rain, and falling to very poor in hill fog. Occasionally improving to good at times in the east for short periods.

Hill fog

Widespread at 200m in the west, increasing to broken amounts at 500m in the east. Highest summits likely to remain shrouded throughout.

Maximum winds above 500m

Easterly 25mph becoming Westerly 50mph during the afternoon.

Temperature

Valleys Plus 14 Celsius increasing plus 19 Celsius.
900 m Plus 9 Celsius.
Freezing level Above the summits.

Sunday

Weather

Any lingering rain will clear during the early hours to leave a dry and increasingly bright day. Whilst some patchy hill fog is likely during the morning, this will soon lift and burn off. Some further patchy cloud and hill fog is possible, with one or two brief showers, however it should be a fine and dry day. Winds will also gradually ease during the day.

Visibility

Good, increasing to very good at times, although moderate in any isolated showers and very poor in hill fog.

Hill fog

Patches at 400m lifting and clearing in the morning.

Maximum winds above 500m

Westerly 40 mph decreasing to westerly 35mph by the afternoon.

Temperature

Valleys Plus 12 Celsius increasing plus 20 Celsius.
900 m Plus 9 Celsius.
Freezing level Above the summits.

Outlook

Monday

A generally dry and bright day with some sunny spells. Winds continue to ease. However it will turn increasingly cloudy from the west later with some showery rain possible, and also some patchy hill fog.

Tuesday

Mainly dry at first with some bright or sunny spells. Cloud increasing later with some showers or rain possible. These could turn thundery, however they should remain isolated.

Wednesday

Another day of scattered showers and sunny intervals. It will be feeling warm in any brighter spells, whilst winds should remain light.

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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