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Snowdonia National Park

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Viewing forecast for Saturday, 12th January, 2013

Forecast last reviewed on Saturday, 18/05/13 at 07:53


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Headline, Snowdonia National Park

Blustery, particularly south. Becoming fine from north.

How Windy?

Easterly 30 to perhaps 40mph and gusts 50mph. The strongest winds likely mid-Wales.

Effect Of Wind?

Widespread buffeting particularly near and west of major ridges and through some cols and passes, particularly mid-Wales.

How Wet?

Little if any precipitation

Snow flurries possible post dawn, and for an hour or two after dawn the risk of constant precipitation Berwyn mountains.

Cloud on the hills?

Mostly or all clearing

Extensive low cloud after dawn, particularly eastern hills, but this will slowly break up from the north.

Chance of cloud free Summits?

20 rising to 80% north and 40% south by early afternoon

Sunshine and air clarity?

Sunshine will gradually develop from north, although extensive high level cloud will thin slowly. Haze will lift, with visibility becoming excellent.

How Cold? (at 900m)

-2C; slowly dropping through the day from east.

Freezing level

700m dropping to 500m.

Planning Outlook for all mountain areas from Sunday, 19th May, 2013

Appreciably armer on the mountains until Tuesday with considerable melting of remaining high level snow cover. Often dry with fairly light winds but mainly on Monday, there could be a few afternoon thunderstorms. Through the week, temperature levels will gradually drop but at least winds will remain fairly light. Total rainfall will be small, although from time to time showers, or occasionally a few hours of steadier rain may develop.

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