Use my current location crosshair

Snowdonia

Weather hazards over 300m on Fri 24 Oct 2014

High risk

Persistent extensive hill fog
Persistent and extensive hill fog this morning, lifting and breaking this afternoon.

Medium risk

Gales
West or southwesterly winds are likely to reach gale force over the highest at first.
Severe chill effect
Chilly throughout, particularly over the highest routes where it will feel close to freezing.

Low risk

Heavy persistent rain
Rain may turn persistent for a time this morning, with some heavy bursts possible.

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Thunderstorms
none
Strong sunlight
none

Fri 24 Oct 2014

It will be a cloudy and windy morning with extensive hill fog and outbreaks of rain or drizzle. It may become wet and slippery underfoot as the rain turns more persistent for a time, but it should clear by around lunchtime, with hill fog lifting and breaking. A much drier and brighter afternoon with some sunny spells developing, however it will feel cool in the strong breeze.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Light rain Light rain Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night
Precipitation probability
90% 70% 20% 10% 10% 10%

Visibility

Poor to very poor in hill fog and rain or drizzle this morning, improving through the morning to become good by the afternoon.

Hill Fog

Extensive and persistent hill fog above 500m, with periods down to 200m, mainly in the west. This will lift and break by midday.

Max wind above 500m

Southwesterly 50mph, soon easing to become westerly 30-35mph through the day.

Temperature

Valleys:
Plus 13 Celsius
800m:
Plus 8 Celsius becoming Plus 3 Celsius
Freezing level:
Above the summits.

Ground conditions

No adverse ground conditions observed by National Park Wardens

Issued at: 0403 on Fri 24 Oct 2014

Sat 25 Oct 2014

It will be much drier and brighter day on Saturday, although still a risk of some drizzly showers at times, although sheltered eastern areas may remain largely dry throughout. Winds will remain strong, especially at height, with a continued risk of gales over exposed summits and ridges.

Visibility

Generally good, but moderate in patchy rain and drizzle, and very poor in hill fog.

Hill Fog

Occasional patches possible down to 500-600m in the south and west, especially in association with showers.

Max wind above 500m

Southwesterly 40-50mph, gusting to 60 mph at times from mid afternoon.

Temperature

Valleys:
Plus 6 Celsius becoming plus 13 Celsius.
800m:
Plus 4 Celsius
Freezing level:
Above the summits.

Issued at: 0403 on Fri 24 Oct 2014

Sun 26 Oct 2014

A windy and generally cloudy day, with some patchy rain and hill fog possible. This is most likely in the west, with eastern areas seeing some brighter interludes. Feeling cool in the wind.

Issued at: 0403 on Fri 24 Oct 2014

Mon 27 Oct 2014

A similar day on Monday, cloudy with occasional hill fog and a few light showers, but some brightness in the east. Winds will remain strong, with gales likely in exposure.

Issued at: 0403 on Fri 24 Oct 2014

Tue 28 Oct 2014

Mainly dry at first on Tuesday, but a band of more persistent rain will arrive from the northwest through the morning, and last for much of the rest of the day. Hill fog will once again be a problem, but the strong winds should ease markedly.

Issued at: 0403 on Fri 24 Oct 2014