Snowdonia National Park Forecast

The Snowdonia National Park.

Viewing Weather Forecast for Sunday 21st December 2014

Today | Monday | Tuesday

Forecast last updated on Saturday 20th December 2014 at 12:08pm

Summary for all mountain areas

Widespread severe gales, rain and low cloud across upland Britain. Rain will rarely cease most western mountains, and be substantial western Scotland where runoff will be augmented by significant snowmelt.

Headline for Snowdonia National Park

Severe upland gales; heavy rain and very low cloud.

How windy? (On the summits)

Westerly 50 to 65mph; gusts 80mph..

Effect of wind on you?

Walking difficult from low levels up and any mobility arduous on higher areas. Severe wind chill.

How Wet?

Rain becoming persistent

Patchy rain at first, becoming persistent western mountains, but remaining patchy east.

Cloud on the hills?

Persistent; from many lower slopes upward

Widely covering higher areas, and cloud base soon dropping to shroud western mountains from low levels up.

Chance of cloud free summits?

Soon almost nil west to 20% east

Sunshine and air clarity?

Sunshine not expected. Extensively foggy across the hills. Hazy at low levels.

How Cold? (at 900m)

3 rising to 5C

Freezing Level

Above the summits.

Planning Outlook

All mountain areas of Britain from Monday 22nd December 2014

The outlook for the Christmas period remains complicated (to say the least) with forecasts from the models variation considerably. Until Christmas frequent upland gales, rain, or in Scotland intermittently snow falling to lower slopes. Then a transient high will give lighter winds Christmas Day and perhaps Boxing Day England and Wales. Then further upland gales, and more likely than not over the following weekend, areas of snow and freezing levels dropping rapidly. However, forecasts now overwhelmingly resume often gale force westerly winds & frequent rain (or snow Scottish Highlands).

In association with
Mountaineering Council of Scotland sportscotland Association of Mountaineering Instructions