Use my current location crosshair

Snowdonia

Weather hazards over 300m on Thu 02 Oct 2014

High risk

No high risks
none

Medium risk

No medium risks
none

Low risk

Persistent extensive hill fog
Isolated patches above 500m through the afternoon for southern slopes.
Strong sunlight
Low risk of sun burn in prolonged sunny spells.

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Gales
none
Severe chill effect
none
Thunderstorms
none
Heavy persistent rain
none

Thu 02 Oct 2014

A chilly start to the day with some valley frost and mist likely at first. There will be plenty of morning sunshine, but cloud will gradually increase through the day. Despite this, there will still be plenty of sunny spells through the afternoon. As the cloud increases, there will be patches of hill fog as low as 500m, mainly affecting southern slopes through the afternoon.

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
Clear night Clear night Sunny day Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night
Precipitation probability
0% 0% 0% 0% 0% 0% 0% 0%

Visibility

Excellent, but poor in early mist and very poor in any hill fog.

Hill Fog

Isolated patches above 500m through the afternoon, mainly for southern slopes.

Max wind above 500m

Southerly 10mph, gradually increasing 25mph.

Temperature

Valleys:
Plus 2 Celsius increasing plus 18 Celsius.
800m:
Plus 6 Celsius.
Freezing level:
Above the summits, but valley ground frost at first.

Ground conditions

Latest: 20/04/2014 15:53 No adverse ground conditions observed by National Park Wardens.

Issued at: 1603 on Wed 01 Oct 2014

Fri 03 Oct 2014

Dry and partly cloudy with some sunny spells across the range. Winds will gradually increase throughout the day as cloud builds and lowers from the northwest. Rain, heavy at times, arriving late evening. Winds reaching gale force through the latter part of the evening.

Visibility

Very good, becoming moderate in rain, poor in heavy rain and very poor in hill fog.

Hill Fog

Bases lowering to 500m through the day, mainly affecting northern and western slopes.

Max wind above 500m

Southwesterly 25mph increasing 40-50mph with gusts 60-70mph.

Temperature

Valleys:
Plus 8 Celsius increasing plus 17 Celsius.
800m:
Plus 10 Celsius.
Freezing level:
Above the summits.

Issued at: 1603 on Wed 01 Oct 2014

Sat 04 Oct 2014

Strong to gale force winds and heavy rain at first. The rain clearing south-eastwards through the morning with drier, brighter conditions following. Winds remaining strong with isolated showers which could be heavy with hail and thunder at times.

Issued at: 1603 on Wed 01 Oct 2014

Sun 05 Oct 2014

A blustery day with sunshine and scattered showers. The showers will be heavy at times with a risk of hail and thunder. It will be cooler than of late with temperatures near the norm for the time of year.

Issued at: 1603 on Wed 01 Oct 2014

Mon 06 Oct 2014

A very similar day to Sunday, southwesterly winds remaining strong and blustery. Frequent heavy and possibly thundery showers.

Issued at: 1603 on Wed 01 Oct 2014