Snowdonia National Park Forecast
The Snowdonia National Park.
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.
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
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.