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RainfallPressureCloud amount forecastWarnings
Weather mapWindTemperatureUV
Forecast
 Fri   Sat   Sun   Mon   Tue 
Daytime Fri 19 Sep 2014 Daytime Sat 20 Sep 2014 Daytime Sun 21 Sep 2014 Daytime Mon 22 Sep 2014 Daytime Tue 23 Sep 2014
Base UK forecast
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Updated: 0522 on Fri 19 Sep 2014
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Snowdonia: forecast uv

Friday, 19 September 2014: dawn to dusk

Printable view Forecast issued: 0356 on Friday, 19 September 2014

Overview for Friday

Hill fog and some heavy, possibly thundery showers this morning. This should gradually clear through the rest of the morning with a drier and brighter end to the day.

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 High Widespread hill fog down to 200-400 metres, gradually clearing through the day.
Thunderstorms Medium Some heavy thunderstorms likely during the morning.
Heavy persistent rain No Risk  
Strong Sunlight Low Potential for sunburn in any prolonged sunny spells in the afternoon.

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
Heavy rain showers
Heavy rain showers
Sunny intervals
Sunny intervals
Sunny intervals
Sunny intervals
30% 60% 40% 20%

Detailed mountain weather forecast: Snowdonia

Friday

Weather

There will be fairly widespread hill fog this morning. Some heavy showers are also likely and these could be thundery at times. Conditions will improve through the day though as cloud lifts and breaks to give some sunny spells and the showers ease away. Low cloud will return, mainly in the east, later in the evening.

Visibility

Generally moderate at first but poor in showers and very poor in hill fog. Becoming moderate to good through the day.

Hill fog

Widespread hill fog down to 200-400 metres, gradually lifting through the morning.

Maximum winds above 500m

Easterly 20 mph.

Temperature

Valleys Plus 12 Celsius rising to 22 Celsius.
900 m Plus 13 Celsius
Freezing level Well above the summits

Saturday

Weather

Another cloudy start, especially in the east of the park, with fairly extensive hill fog. Conditions will turn brighter throughout the morning with cloud lifting and breaking to give some sunny spells. Although it will be mostly dry, a few heavy showers are possible during the first half of the day before easing away later. It will feel fresher by the end of the day.

Visibility

Generally moderate at first but poor in showers and very poor in hill fog. Becoming good through the day.

Hill fog

Widespread hill fog down to 300-500 metres, gradually lifting through the morning.

Maximum winds above 500m

Northeasterly 25 mph.

Temperature

Valleys Plus 12 Celsius rising to 19 Celsius.
900 m Plus 10 Celsius.
Freezing level Well above the summits.

Outlook

Sunday

A much brighter start than of late with just isolated areas of hill fog likely. A few showers cannot be ruled out early on but these should quickly clear, leaving a fine and dry day with sunny spells and a light breeze.

Monday

Aside from a few mist and fog patches in sheltered spots, it should be another bright start. Decent spells of sunshine are expected to develop and it will remain dry throughout the day.

Tuesday

Again some patchy mist or fog to start but this soon clearing to leave a fine day with some decent bright or sunny spells. Perhaps turning cloudier and breezier later with a few spots of rain.

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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