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Snowdonia National Park
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Viewing forecast for Sunday, 13th January, 2013
Forecast last reviewed on Saturday, 18/05/13 at 16:12
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 Monday, 20th May, 2013
Warm with continued rapid melting of remaining snow at higher levels on Monday and for most of Tuesday with a good deal of sunshine and very little precipitation. Gradually turning cooler and cloudier from the northwest from late Tuesday. Probably only small amounts of rain and winds generally remaining fairly light. A divergence of views towards next weekend with some models pointing to high pressure persisting just to the west of Ireland bringing mainly dry weather and others pointing to more unsettled weather slowly extending southwards at least across northern ranges.