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Updated: 1358 on Wed 30 Jul 2014
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Snowdonia: forecast wind

Wednesday, 30 July 2014: dawn to dusk

Printable view Forecast issued: 0447 on Wednesday, 30 July 2014

Overview for Wednesday

A largely dry and fine day with variable amounts of cloud.

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 Cloud bases falling to 300 metres during the evening leaving some persistent fog in places.
Thunderstorms No Risk  
Heavy persistent rain No Risk  
Strong Sunlight Medium Risk of sunburn in prolonged sunny spells.

key to hazards and forecast content

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

Detailed mountain weather forecast: Snowdonia

Wednesday

Weather

A largely dry and fine day with variable amounts of cloud leading to some bright or sunny spells. Feeling warm in the sunshine. Small chance of a light showery outbreak, most likely first thing, then again late evening.

Visibility

Generally very good, but good to moderate in any showers and very poor in hill fog.

Hill fog

Patchy hill fog above 600 metres at times through the day. Bases falling to 300 metres in the west during the evening.

Maximum winds above 500m

Westerly 25 mph.

Temperature

Valleys Plus 13 becoming plus 20 Celsius.
900 m Plus 11 Celsius.
Freezing level Well above the summits.

Thursday

Weather

Dry to start and bright at times during the morning although there will be plenty of low cloud, this especially giving fog over western slopes where there could also be a little patchy rain for a time. Cloud will gradually break and lift towards lunchtime though to give more in the way of sunshine, although scattered showers during the afternoon could interrupt this, with the odd heavier downpour possible.

Visibility

Generally good, but moderate in rain or showers and very poor in hill fog.

Hill fog

Broken amounts of hill fog down to around 300 metres during the morning. This generally breaking and lifting towards the middle of the day with just a little fog above 400 metres at times through the afternoon.

Maximum winds above 500m

Southwesterly 20 mph.

Temperature

Valleys Plus 13 becoming plus 19 Celsius.
900 m Plus 10 Celsius.
Freezing level Well above the summits.

Outlook

Friday

Some bright or sunny spells, but increasingly frequent showers, heavy at times. Moderate west wind.

Saturday

Scattered heavy showers, with the risk of hail and thunder. Moderate southwest wind.

Sunday

Again a mix of bright spells and scattered showers. Fresh southwest wind.

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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