Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Snow and hail showers
Periods of bright or sunny conditions mixed with showers or flurries of snow and hail.
Chilly
Air temperature near or just above freezing on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Winter kit required on higher mountains
Snow cover over higher mountain terrain. Safe progress around some tops and ridges will require suitable footwear - possibly crampons and ice-axe where necessary.
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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Snow and hail showers
Periods of bright or sunny conditions mixed with showers or flurries of snow and hail.
Chilly
Air temperature near or just above freezing on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Winter kit required on higher mountains
Snow cover over higher mountain terrain. Safe progress around some tops and ridges will require suitable footwear - possibly crampons and ice-axe where necessary.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 21st November 2024
Last updated
Wed 20th Nov 24 at
3:34PM
Summary for all mountain areas
Heavy snow showers with gales in the Highlands. Southern Scotland and northern England mostly sunny, cold, windy at times, only isolated snowfall near the coasts. In Wales changeable conditions, from snowfall and whiteouts to sunny spells with a few clouds. Chilly.
Headline for Eryri / Snowdonia National Park
Mix of some sun, snow, rain, whiteouts, gustiness and cold
How windy? (On the summits)
West to northwesterly, 15 to 30mph, varying. Perhaps stronger evening.
Effect of the wind on you?
Variable, in places buffeting with marked wind chill and impeded walking, balance on high ridges may be affected.
How Wet?
Showers, may last for several hours
Prolonged showers of snow and hail possible, on northernmost hills even likely. Mostly in form of rain lower slopes, snow above 400m. Risk isolated lightning. Snow on ground.
Cloud on the hills?
On high tops and often low in showers
Hills often covered with low cloud down to lower slopes, particularly in snowfall. In breaks between showers cloud often clearing.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Sun in and out, longer periods with no sun at all and prolonged whiteouts in showers. Sun most frequent east Wales.
How Cold? (at 900m)
-2 to +1C. Feeling below -5C in wind.
Freezing Level
Near 500m by the coast, well inland 200-400m.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 22nd November 2024
Last updated
Wed 20th Nov 24 at
3:34PM
How windy? (On the summits)
Northwesterly, 30 to 45mph, slowly easing through the day. Sudden gusts near 50mph.
Effect of the wind on you?
Walking arduous, in places foot placement difficult. Wind chill, keeping balance on ridges hardly possible.
How Wet?
Snowfall, locally fairly heavy
Intense snow and hail showers, most on Snowdon & near the coast. Central Wales more often dry. Below 400m rain, above 700m surely snow. Chance isolated lightning. Snowline rising through the day, showers becoming rare in the afternoon.
Cloud on the hills?
Likely covered near showers
Low cloud on various levels where snow is falling. If dry (most often east Wales), hills most likely clear. Toward evening more often dry and therefore clear hills.
Chance of cloud free summits?
30%, rising to 70%
Sunshine and air clarity?
Glimpses of sun possible between dominating periods of overcast sky and temporary whiteouts.
How Cold? (at 900m)
0C, feeling below -10C in wind
Freezing Level
500-700m, rising gradually to 800m
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 23rd November 2024
Last updated
Wed 20th Nov 24 at
3:34PM
How windy? (On the summits)
Southeasterly 40 to 70mph, high variability in time and space. Gusts 80mph possible.
Effect of the wind on you?
Severe conditions, any activity on the exposed ridges highly dangerous regardless of experience.
How Wet?
Snowfall, then heavy rain
Snowfall in the morning, at times heavy, but soon changing into rainfall. Rain continues to be intense, Very wet underfoot by the end of the day, with additionally melting snow streams in spate, flooding possible.
Cloud on the hills?
Hills covered extensively, whiteout
Hills fully covered, very likely all day. With intense precipitation whiteout frequent at least first half of the day.
Chance of cloud free summits?
Very low
Sunshine and air clarity?
Overcast, zero visibility, whiteout.
How Cold? (at 900m)
-1C rising to +9C
Freezing Level
Rising from 400-600m early morning to well above all summits afternoon.
Planning Outlook
Weekend will start with heavy snowfall for many mountains. With significant warming, from Saturday afternoon change into snow, perhaps locally freezing rain for a while. On Sunday frequent rain, freezing level above all summits. On both weekend days severe winds even in the valleys! Next week with start with some cooling, mix of rain and snow showers, then dry for Tuesday and Wednesday. Wednesday night another warm front will move over the UK southwest to northeast, bringing rain and strong winds. Later, milder and moderately wet.