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Snowdonia National Park
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Viewing forecast for Sunday, 13th January, 2013
Forecast last reviewed on Wednesday, 11/12/13 at 12:31
Headline, Snowdonia National Park
Snow, rarely heavy, slowly extending southeast in afternoon.
Southwesterly, almost calm at first, 15 to perhaps 20mph Snowdon range, by mid-afternoon.
Effect Of Wind?
Light snow slowly spreading from northwest.
Snow flurries here and there, most likely Snowdon range, before light snow develops from the northwest in afternoon, turning to rain only in the valleys.
Cloud on the hills?
Extensively cloud free
Summits substantially cloud free, but slowly in snow cloud will increasingly form across the hills, mostly only higher up, although perhaps below 500m coastal areas into the afternoon.
Chance of cloud free Summits?
Greater than 90%, dropping to 50% west by mid-afternoon.
Sunshine and air clarity?
Sunshine will fade as high level cloud thickens. Visibility superb, but will deteriorate markedly in snow.
How Cold? (at 900m)
400m, although ground partially frozen on lower slopes after a frost.
Planning Outlook for all mountain areas from Thursday, 12th December, 2013
The present dry conditions will progressively give way from the northwest later this week, as fronts come in off the Atlantic. Remaining windy, particularly Scottish Highlands. From Saturday, lengthy upland gales, sometimes storm force, particularly across Scotland. Often wet, particularly western mountains. Freeze thaw cycles, mainly Scottish Highlands.