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Snowdonia

Weather hazards over 300m on Sun 04 Dec 2016

High risk

No high risks
none

Medium risk

Severe chill effect
Some significant wind chill effects at higher levels.

Low risk

No low risks
none

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Gales
none
Persistent extensive hill fog
none
Thunderstorms
none
Heavy persistent rain
none
Strong sunlight
none

Sun 04 Dec 2016

It will be a dry day with plenty of sunshine developing by the afternoon, but it will remain cold with some frozen ground possible, mainly at higher levels. Ragged patches of hill fog are also possible during the morning.

Time
0000 to 0300 0300 to 0600 0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Partly cloudy night Clear night Sunny day Sunny day Sunny day Sunny day Clear night Clear night
Precipitation probability
0% 0% 0% 0% 0% 0% 0% 0%

Visibility

Generally good to very good, though poor to very poor in any ragged patches of hill fog at first.

Hill Fog

Ragged patches at 200m during the morning, but soon clearing.

Max wind above 500m

Easterly 25 to 30mph with gusts 35 to 40mph.

Temperature

Valleys:
Minus 2 Celsius becoming Plus 4 Celsius.
800m:
Minus 2 Celsius.
Freezing level:
Around 500m.

Ground conditions

Area - Snowdon Date - 30 November 2016 Time - 13.30pm Snow Above - 750m. Report By - Snowdon Warden. Route Taken Miners/PyG. Conditions •Light dusting of hail or snow. • Depth of snow increases with altitude. •Snow compacted on paths making conditions very slippery underfoot. Kit Advice The following is a list of additional kit required based on the current conditions. •Ice axe and crampons recommended. • Wear crampon compatible boots. • Walking poles for unconsolidated snow. • Take waterproofs, hat, gloves and spare warm layers. Additional Information None.

This report is completed on a regular basis through the winter months by Snowdonia National Park Wardens and gives indicative information on snow/ice conditions underfoot in the Snowdonia area as a whole. Remember mountains can be inhospitable and dangerous places for the ill-prepared so it is important to check the forecast before setting out.

Further information:
Live information on Winter Conditions in Cwm Idwal: https://www.thebmc.co.uk/idwal
Forum discussions on the latest Winter Conditions: http://www.ukhillwalking.com/forums/i.php?f=7
The Met Office is not responsible for the content of external sites.

Mon 05 Dec 2016

Some clear or sunny spells at first with overnight fog patches in valleys slowly clearing, but cloud will increase during the morning with hill fog becoming quite extensive during the afternoon. Remaining dry and cold.

Visibility

Generally moderate or good, but poor to very poor in hill fog, especially later.

Hill Fog

Ragged patches at 200m at first, becoming broken to blanket above 300 to 400m during the morning.

Max wind above 500m

Southeasterly 25 to 30mph.

Temperature

Valleys:
Minus 3 Celsius becoming Plus 5 Celsius.
800m:
Minus 1 Celsius, becoming plus 1 Celsius.
Freezing level:
Around 500m at first, rising above the summits later.

Tue 06 Dec 2016

Rather cloudy, and less cold than recently with freezing level above the summits. Whilst the odd spot of rain is possible, these will be few and far between. However there will be fairly extensive hill fog above 300-400m. Moderate to fresh southery winds.

Wed 07 Dec 2016

Cloud will gradually thicken from the west with some outbreaks of rain. This will lead to some persistent hill fog above 400m. Milder with freezing level well above the summits. Fresh to strong south to southwest winds.

Thu 08 Dec 2016

Remaining generally cloudy with some outbreaks of rain and hill fog. Moderate to fresh southwest winds and freezing level well above the summits.

Issued at: 1536 on Sat 03 Dec 2016