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yellow Warnings have been issued for the United Kingdom

Snowdonia

Weather hazards over 300m on Fri 24 Feb 2017

High risk

No high risks
none

Medium risk

No medium risks
none

Low risk

No low risks
none

No risk

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

Fri 24 Feb 2017

Cold with clear spells overnight allowing some icy patches to form. Sunny spells through the day and mainly dry. A brisk south-westerly wind will strengthen later making it feel quite cold in exposure. During the evening the freezing level will rise as cloud and rain arrive from the west with only some transient sleet or snow possible for a time. Southwesterly winds strengthening further during the evening.

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 Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Cloudy Light rain Heavy rain
Precipitation probability
10% 10% 10% 10% 0% 20% 80% 100%

Visibility

Mainly very good, poor in any late wintry showers and moderate in rain later.

Hill Fog

Well broken above 700 metres becoming broken to overcast at 600 metres during the evening.

Max wind above 500m

NW 35 mph at first.

Temperature

Valleys:
Minus 2 becoming plus 4 Celsius
800m:
Minus 2 becoming plus 2 Celsius
Freezing level:
500 metres rising above summits later.

Ground conditions

Area - Snowdon Date - 19 February 2017 Time - 12.30pm Snow Above - 950metres Report By - JonElliott Route Taken Penypass to Lliwedd. Watkin to Snowdon.Descend Miners track. Conditions: Isolated patches of snow. No adverse ground conditions observed by the National Park Wardens. Thawing at all levels. Paths clear. Kit Advice: The following is a list of additional kit required based on the current conditions. Wear sturdy walking boots. Take waterproofs, hat, gloves and spare warm layers.

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.

Sat 25 Feb 2017

A cloudy day with extensive hill fog and long periods of locally heavy rain. Strong southwesterly winds.

Visibility

Moderate, poor in heavy rain with extensive hill fog.

Hill Fog

Overcast above 600 metres with broken patches down to 400 metres.

Max wind above 500m

SW 50 gust 65 mph

Temperature

Valleys:
Plus 2 becoming 6 Celsius
800m:
Plus 6 Celsius
Freezing level:
Above summits.

Sun 26 Feb 2017

Overnight rain clearing leaving a dry start the day, but rather cloudy. Another windy day follows with southwesterly winds strengthening as a band of heavy rain crosses the area through the afternoon. The freezing level remaining just above the highest summits.

Mon 27 Feb 2017

A cloudy with scattered heavy showers, wintry above 600m. These could align into more persistent bands, leading to some significant accumulations in places. Between showers, some fine conditions are likely, but there will also be the risk of rapid deteriorations as further showers move through. The freezing level will be around 600m, whilst strong winds will lead to an additional hazard.

Tue 28 Feb 2017

A better day with just the odd shower, wintry over the highest ground. Still very windy, especially at height. Freezing level around 700 metres.

Issued at: 1514 on Thu 23 Feb 2017