Use my current location crosshair

Snowdonia

Weather hazards over 300m on Thu 23 Oct 2014

High risk

Gales
Winds will strengthen and are likely to reach gale force across some of the highest points.
Persistent extensive hill fog
Hill fog expected to affect the park through much of today.

Medium risk

Severe chill effect
Strong winds will make it feel close to freezing throughout the day.

Low risk

Heavy persistent rain
Outbreaks of drizzle may turn persistent at times, particularly on western facing slopes.

No risk

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

Thu 23 Oct 2014

A cloudy day with extensive hill fog and outbreaks of drizzle which may turn persistent at times on western facing slopes. It will be windy too, with a risk of gales across the highest routes.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Light rain Light rain Light rain Light rain Drizzle Drizzle
Precipitation probability
80% 90% 80% 80% 80% 80%

Visibility

Generally poor or very poor in hill fog and drizzle, but possibly moderate in the east during the afternoon.

Hill Fog

Extensive and persistent hill fog above 500m, with periods down to 200m, mainly in the west. Although this may lift and break to become occasional down to 600m for intervals during the afternoon.

Max wind above 500m

Southwesterly 45-55mph.

Temperature

Valleys:
Plus 16 Celsius
800m:
Plus 8 Celsius
Freezing level:
Well above the summits.

Ground conditions

No adverse ground conditions observed by National Park Wardens

Issued at: 0410 on Thu 23 Oct 2014

Fri 24 Oct 2014

A rather cloudy morning with outbreaks of rain or drizzle and extensive hill fog. This will clear away to the southeast later in the day with clearer and cooler weather following, but there may be the odd light shower too.

Visibility

Generally poor or very poor in rain, drizzle and hill fog through the first part of the day, however it will improve to good as the rain clears later.

Hill Fog

Extensive and persistent hill fog above 500m, with periods down to 200m, mainly in the west. This will lift and break later in the day, this is most likely to happen in the afternoon however timings are uncertain.

Max wind above 500m

Southwesterly 45-50 mph, easing to 35-40mph later.

Temperature

Valleys:
Plus 7 Celsius becoming Plus 3 Celsius
800m:
Plus 14 Celsius
Freezing level:
Well above the summits.

Issued at: 0410 on Thu 23 Oct 2014

Sat 25 Oct 2014

Bright with some clear spells, but also some cloudier spells with some patchy hill fog and perhaps shower or two. It will feel chilly in the strong wind. There is a risk that gusts may reach storm force over the peaks.

Issued at: 0410 on Thu 23 Oct 2014

Sun 26 Oct 2014

Another windy and generally cloudy, with some showers and hill fog possible. The showers may merge at times to form longer spells of rain. Feeling cool in the wind. The risk of storm force winds continues at first, but the winds will steadily ease later.

Issued at: 0410 on Thu 23 Oct 2014

Mon 27 Oct 2014

Cloudy on Monday with occasional hill fog and a few light showers. There is a risk of some more prolonged rain, however this is uncertain. It won't be as windy as on previous days, however it will still be breezy.

Issued at: 0410 on Thu 23 Oct 2014