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Snowdonia National Park
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Viewing forecast for Friday, 25th January, 2013
Forecast last reviewed on Thursday, 12/12/13 at 15:12
Headline, Snowdonia National Park
Gradually deteriorating as upland gales and snow develop from west.
Southerly, less than 30mph after dawn, but progressively strengthening to 50 gusts 65mph by early afternoon.
Effect Of Wind?
Walking increasingly difficult across the hills from west as gales develop. Severe wind chill.
Snow gradually developing from west, mainly afternoon
A little light snow in morning, but will turn more persistent from the west in the afternoon, with blizzards likely. May well be rain western valleys.
Cloud on the hills?
Only pockets of low cloud on some higher slopes at first, possibly most of the day in the east. But deteriorating in snow with low cloud becoming very widespread above 600m, with patches below 400m.
Chance of cloud free Summits?
70% dropping gradually to 20%
Sunshine and air clarity?
Little if any sunshine. Visibility very good but deteriorating in snow to give widespread fog or on some higher areas near zero visibility.
How Cold? (at 900m)
-3C later rising to -1C toward the west.
Terrain frozen from valleys upward, although slight thawing below 200m.
Planning Outlook for all mountain areas from Saturday, 14th December, 2013
A much wetter and most extensively in Scotland stormy period: Across Highland Scotland, there will be a series of freeze thaw cycles. Total precipitation will be considerable over western Scotland (but one or two bouts of heavy rain on all western mountains). Severe or occasionally storm force winds, will be most frequent across the Scottish Highlands.