Snowdonia National Park Forecast

The Snowdonia National Park.

Viewing Weather Forecast for Friday 19th December 2014

Today | Saturday | Sunday

Forecast last updated on Thursday 18th December 2014 at 1:51pm

Summary for all mountain areas

Widespread severe upland gales, reaching storm force across the Scottish Highlands. Frequent snow and hail showers on western mountains, threat of lightning, particularly northern Scotland. Fewer showers and more sunshine England & Wales.

Headline for Snowdonia National Park

Severe upland gales. Scattered snow and hail showers developing.

How windy? (On the summits)

Westerly 50 to 60mph, gusts 75mph.

Effect of wind on you?

Considerable buffeting at low levels and walking widely difficult on higher areas. Severe wind chill.

How Wet?

Occasional showers developing

Overnight rain will clear before dawn. Then scattered showers, mostly west, of hail or snow above about 500m, most frequent in afternoon. Very wet underfoot, and streams in flood after previous days rain.

Cloud on the hills?

Many tops clearing

Fragments of cloud on the hills at dawn, but breaking, and many summits widely cloud free away from showers. Cloud may come and go on higher western tops.

Chance of cloud free summits?

60% west; 80% inland

Sunshine and air clarity?

Bursts of sun developing, mostly inland. Excellent visibility away from showers, but suddenly deteriorating around showers.

How Cold? (at 900m)

0 or -1C

Freezing Level

700m

Planning Outlook

All mountain areas of Britain from Saturday 20th December 2014

Few days without gales on the mountains up to Christmas. Precipitation almost daily, particularly western mountains. Freezing levels rising above most mountain tops on Sunday, resulting in a significant thaw. Next week intermittent cycles of freeze and thaw, but frequently below freezing on Scottish summits. Indications favour colder air spreading southwards around or after Christmas Day, with freezing levels dropping significantly, leaving most ground frozen from just above most valleys upwards, and snow falling to lower slopes.

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