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Snowdonia National Park
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Viewing forecast for Friday, 25th April, 2014
Forecast last reviewed on Thursday, 24/04/14 at 15:36
Summary for all mountain areas
A front will bring a blanket of very low cloud westwards, although some western mountains will be clear of cloud, at least for a few hours. Heavy showers will develop, particularly across England and E Wales, these later merging to give northward moving areas of thundery rain.
Headline, Snowdonia National Park
Cloud at times shrouding higher eastern areas. Increasingly wet.
Easterly, 10 to 15, perhaps strengthening 20mph by early evening.
Effect Of Wind?
Showers; and areas of heavy rain toward evening; risk lightning
A few heavy showers afternoon, and possibly in evening the rain widespread toward east. Risk thunder.
Cloud on the hills?
Very little west; intermittently forming east
Patches of low cloud at first, mainly higher eastern slopes, will lift to clear the summits by late morning. But during afternoon, cloud increasingly reforming above 500 or 600m eastern areas, and in evening, may reach western areas.
Chance of cloud free Summits?
80% west and 60% east
Sunshine and air clarity?
Patches of bright sun, mainly morning toward west. Visibility excellent before haze progressively thickens from the east.
How Cold? (at 900m)
6C, but 4C where in cloud.
Above the summits.
Planning Outlook for all mountain areas from Saturday, 26th April, 2014
Windy on the mountains (particularly Wales and Scottish Highlands) and areas of low cloud and rain on Saturday. Less windy, and generally showery on Sunday, though the low cloud will persist on some eastern mountains. Early next week, over 2 or 3 days turning colder from the north. There will be showers, but by about Thursday substantially dry with the air very clear. Thaw of snow will cease (except where in the sun) for 2 or 3 days, and in valleys, there may well be overnight frost.