Snowdonia National Park Forecast

The Snowdonia National Park.

Viewing Weather Forecast for Monday 30th March 2015
Forecast last updated on Sunday 29th March 2015 at 8:28pm

Today | Tuesday | Wednesday

Summary for all mountain areas

Widespread upland gales, briefly easing a little. With the likely exception of northern Scotland, rapidly deteriorating - becoming stormy by mid or late afternoon onward; heavy snow setting in, but turning to rain from Southern Uplands southwards.

Headline for Snowdonia National Park

Upland gales, briefly easing, stormy afternoon. Snow then rain sets in.

How windy? (On the summits)

West or southwesterly. Speeds changing, 30 to 40mph for several hours, least wind mid-late morning, but by early afternoon, rapidly strengthening toward 50 to 70mph; risk gusts 80-90mph late in day.

Effect of wind on you?

Expect very difficult conditions, particularly later afternoon, when any mobility difficult & wind chill severe where exposed.

How Wet?

Snow then rain afternoon

Substantially dry morning. However, a sudden deterioration likely around midday; snow will suddenly arrive from the west, turning to rain, heaviest western mountains, setting in for rest of the day.

Cloud on the hills?

Extensive afternoon

Breaks to higher hills morning. But will deteriorate by late morning or early afternoon: base will drop to 300 to 600m widely - lowest western mountains.

Chance of cloud free summits?

30% early morning; almost nil late morning onward.

Sunshine and air clarity?

Glimpses of sunshine will soon give way as cloud thickens. A haze, and in snow and cloud appalling or near zero visibility.

How Cold? (at 900m)

-2C, will rise to 4C afternoon. Feeling as cold as minus 15C directly in the wind.

Freezing Level

700m. In afternoon will lift above the summits.

Planning Outlook

All mountain areas of Britain from Tuesday 31st March 2015

Expect cold and showery weather for all mountain regions during both Tuesday and Wednesday, precipitation most frequent over western mountains, snow falling to lower slopes, with freezing level typically 500 to 700m, highest Wales. Widespread upland gales will also continue until mid-week. There is now moderate confidence of much 'quieter' weather as pressure builds over Easter. It may remain cold, but substantially dry and winds frequently light.

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