• home

We’ve upgraded

Old Met Office computer

This page will be removed later in the year and may not contain the latest information. Please use our new page:

Why have we done this?

RainfallPressureCloud amount forecastWarnings
Weather mapWindTemperatureUV
Forecast
Back Stop Play Next 
 Mon   Wed   Thu   Fri 
Not available Not available Not available Not available Not available Not available Not available
UK forecast
Please wait.
Key to map Guide
Updated: 0647 on Mon 30 Jun 2014
Go to region

Go to location
Go to postcode location
Zoom out
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

Digital Map Data:
© Collins Bartholomew Ltd (2006)
Postcode information:
© Royal Mail Group PLC (2006)

Snowdonia: forecast radar

Thursday, 31 July 2014: dawn to dusk

Printable view Forecast issued: 1437 on Thursday, 31 July 2014

Overview for Friday

A cloudy day with showery rain, becoming heavier and more persistent 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 Medium Extensive at 500m at first, becoming patchy, but as low as 300m at times.
Thunderstorms Low Low risk of an isolated thrundery downpour.
Heavy persistent rain Medium Showery rain throughout, possibly reaching totals of 40mm in 24 hours.
Strong Sunlight No Risk  

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
Cloudy
Cloudy
Light rain showers
Light rain showers
Light rain showers
Light rain showers
Light rain showers
Light rain showers
20% 40% 60% 70%

Detailed mountain weather forecast: Snowdonia

Friday

Weather

A cloudy start with showery rain. The rain will become more persistent throughout the day ,particularly on western slopes. Rain will be heavy at times with a risk of thunder. Cloud bases will be at 500m at first, lifting and breaking at times through the day, but may drop as low as 300m in heavy rain or thunderstorms. Winds will be fresh southwesterly.

Visibility

Good, but moderate in rain, poor in heavy rain and mist, very poor in hill fog.

Hill fog

Extensive above 500m at first, becoming patchy, possibly as low as 300m at times.

Maximum winds above 500m

Southwest 15-20mph.

Temperature

Valleys Plus 12 Celsius increasing plus 18 Celsius.
900 m Plus 10 Celsius.
Freezing level Above the summits.

Saturday

Weather

Rain, heavy at times, will gradually move northeast to be followed by scattered showers. The showers becoming less frequent throughout the day. Cloud bases will be as low as 500m at times throughout the day, particularly over southern slopes. Winds generally northwesterly moderate.

Visibility

Good, but moderate in rain, poor in heavy rain and mist, very poor in hill fog.

Hill fog

Patchy at 500m throughout the day.

Maximum winds above 500m

Southwest becoming northwest 12-17mph.

Temperature

Valleys Plus 12 Celsius increasing plus 17 Celsius.
900 m Plus 9 Celsius.
Freezing level Above the summits.

Outlook

Sunday

Some showery rain possible at first, then clearing to leave a mainly dry day with sunny spells and isolated showers. Breezy, particularly at height, easing later.

Monday

A generally dry and bright day with some sunny spells. Winds lighter than Sunday. Increasingly cloudy from the west later with some showery rain possible.

Tuesday

Mainly dry at first with some bright or sunny spells. Cloud increasing later with some showers or rain possible.

Observations

Webcams

The Met Office is not responsible for the content of external sites. If you would like to consider adding a link to your webcam, please contact us.

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

Get updates