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Snowdonia

Weather hazards over 300m on Mon 20 Apr 2015

High risk

No high risks
none

Medium risk

Strong sunlight
Prolonged sunny conditions will increase exposure to UV.

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

Mon 20 Apr 2015

Dry with light winds throughout the day. Largely cloudy in the early hours of Monday with some patches of hill fog, but brightening up shortly after sunrise to give a fine and dry day with lengthy sunny spells, particularly in the late afternoon and evening, and continuing clear after sunset. Despite the fine conditions it will feel rather cool at height, particularly in the morning.

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
Cloudy Cloudy Sunny intervals Sunny day Sunny day Sunny day Sunny day Clear night
Precipitation probability
10% 10% 0% 0% 0% 0% 0% 0%

Visibility

Good to very good, but very poor in early hill fog.

Hill Fog

Well broken above 400 metres at first in the far east at first, readily lifting and breaking shortly after sunrise.

Max wind above 500m

East to southeasterly 10-15mph.

Temperature

Valleys:
Plus 5 Celsius becoming Plus 13 Celsius.
800m:
Plus 4 Celsius becoming Plus 8 Celsius.
Freezing level:
Above the highest summits.

Ground conditions

Latest: Date of observations: 16 April 2015 Observation made on: Snowdon Time of observation: 9:00 am Winter conditions above: N/A Ground Conditions: No adverse ground conditions observed by National Park Wardens. 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: 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.

Issued at: 1618 on Sun 19 Apr 2015

Tue 21 Apr 2015

Dry and clear overnight with light winds, allowing areas of fog to form in valleys. A slight grass frost is possible towards the end of the night as temperatures fall under clear skies. Frost and fog should clear quickly after sunrise on Tuesday morning, to leave a fine and sunny day with little if any cloud, and feeling warmer than on Monday.

Visibility

Mainly good, but very poor in fog in valleys overnight.

Hill Fog

Nil.

Max wind above 500m

Easterly 15-20mph.

Temperature

Valleys:
Plus 2 Clesius becoming Plus 17 Celsius.
800m:
Plus 6 Celsius becoming Plus 9 Celsius.
Freezing level:
Above the highest summits.

Issued at: 1618 on Sun 19 Apr 2015

Wed 22 Apr 2015

Another dry, sunny and warm day after any early morning fog clears. A touch more breeze than recent days, but still relatively light.

Issued at: 1618 on Sun 19 Apr 2015

Thu 23 Apr 2015

Dry and warm with some sunny spells, but also rather more cloud at times compared to recent days, and perhaps some outbreaks of rain arriving from the southwest in the evening. Light winds for much of the day, but southwesterly breezes likely to pick up later.

Issued at: 1618 on Sun 19 Apr 2015

Fri 24 Apr 2015

Turning unsettled, with brisk southwesterly winds, large areas of hill fog, and scattered blustery showers throughout the day. A marked contrast to the recent settled weather.

Issued at: 1618 on Sun 19 Apr 2015