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yellow Warnings have been issued for the United Kingdom


Weather hazards over 300m on Thu 26 Nov 2015

High risk

Persistent extensive hill fog
Hill fog becoming extensive down to 500 metres with patches down to 200 metres.

Medium risk

No medium risks

Low risk

No low risks

No risk

Heavy snow
Storm force winds
Severe chill effect
Heavy persistent rain
Strong sunlight

Thu 26 Nov 2015

Cloud increasing and lowering through the morning with extensive hill fog by the afternoon. Mainly dry initially, but outbreaks of rain or drizzle spreading in through the afternoon, becoming persistent by the evening.

0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Cloudy Cloudy Light rain Light rain Light rain Light rain
Precipitation probability
10% 10% 50% 70% 80% 80%


Moderate to good, poor in rain or drizzle and very poor in hill fog.

Hill Fog

Patches above 600 metres at first, becoming extensive around 500 metres through the morning with patches down to 200 metres, especially west facing slopes later.

Max wind above 500m

Westerly 40mph


Plus 2 becoming Plus 10 Celsius
Plus 2 becoming Plus 8 Celsius
Freezing level:
Above the summits.

Ground conditions

Latest: Date of observations: 25 Nov 2015 Observation made on: Snowdon Time of observation: 11:30 Winter conditions above: 900 Ground Conditions: Isolated patches of snow. Observations on: Observation Text: Kit Advice: 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:
Forum discussions on the latest Winter Conditions:
The Met Office is not responsible for the content of external sites.

Fri 27 Nov 2015

Cloudy with outbreaks of rain, the rain becoming heavy at times through the afternoon before clearing through the evening. Colder conditions and scattered showers following, falling as snow over the summits. Winds increasing, with gales by the afternoon.


Moderate or poor in rain, becoming very good later in the evening. Very poor in hill fog and snow showers.

Hill Fog

Extensive down to 500 metres through the morning, becoming isolated above 600 metres through the afternoon.

Max wind above 500m

Southwest 60mph


Plus 7 rising Plus 10 Celsius
Plus 6 becoming Minus 1 Celsius
Freezing level:
Above the summits, becoming 800 metres later.

Sat 28 Nov 2015

Largely cloudy with blustery showers or longer periods of rain. These showers will be heavy at times and falling as snow over the summits. Remaining very windy with gales, making it feel bitterly cold with severe wind-chill. Freezing levels 600 metres, rising just above the summits by day.

Sun 29 Nov 2015

The unsettled, showery conditions will continue, the showers again wintry at first over higher ground. There will be some bright spells likely through the day. Windy with gales in many places. Frost overnight with icy surfaces after wintry showers. Freezing levels 700 metres, rising above the summits.

Mon 30 Nov 2015

Remaining very windy with gales continuing. A dry but cloudy start is likely, but rain, heavy at times, spreading in from the west by the afternoon. Freezing levels above the summits.

Issued at: 0415 on Thu 26 Nov 2015