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Snowdonia

Weather hazards over 300m on Fri 24 Mar 2017

High risk

No high risks
none

Medium risk

No medium risks
none

Low risk

Severe chill effect
Strong winds and low temperatures at height will give a significant chill.
Strong sunlight
Sunny spells in the afternoon give a risk of sunburn with a deceptive breeze.

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Gales
none
Persistent extensive hill fog
none
Thunderstorms
none
Heavy persistent rain
none

Fri 24 Mar 2017

Chilly overnight with clear spells. A dry day to follow with cloud amounts increasing for a time through the day, although still with sunny periods, these more especially in shelterd western areas. There will be strong easterly winds at height giving a significant chill.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night
Precipitation probability
0% 0% 0% 0% 0% 0%

Visibility

Very good generally, although very poor in hill fog.

Hill Fog

Some well broken patches at times across the high summits.

Max wind above 500m

Easterly 35mph, gusts 45 mph

Temperature

Valleys:
Zero Celsius rising to plus 13 Celsius.
800m:
Zero Celsius rising to plus 4 Celsius.
Freezing level:
800 metres at first rising to just above the summits through the afternoon.

Ground conditions

Area - Snowdon; Date - 22 March 2017; Time - 13.00pm Snow Above - 400m; Report By - Warden; Route Taken-Miners Track; Conditions Light dusting of hail or snow. Depth of snow increases with altitude. Kit Advice: The following is a list of additional kit required based on the current conditions. Ice axe and crampons recommended. Wear crampon compatible boots. Walking poles for unconsolidated snow. 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.

Sat 25 Mar 2017

Clear spells overnight with some low level mist and fog patches in sheltered valleys at first and also a risk of frost in prone hollows. Then a dry and fine day with plenty of sunshine, and becoming warm in sheltered valleys. Winds a little less strong at height with not so much of a chill.

Visibility

Very good or excellent, although very poor in any valley fog.

Hill Fog

No hill fog expected.

Max wind above 500m

Easterly 20-30mph.

Temperature

Valleys:
Zero Celsius rising to plus 15 Celsius.
800m:
Plus 5 Celsius.
Freezing level:
Around the summits rising above during the evening.

Sun 26 Mar 2017

It will remain dry through Sunday with a risk of some early frost or low level fog patches. Sunny periods, but it may turn a little cloudier into the afternoon. Stronger easterly winds at height, and feeling a little colder than Saturday. Freezing levels above the summits.

Mon 27 Mar 2017

Another dry day with variable cloud and sunny spells. There may be areas of hill fog in the morning on eastern upslopes, but these should lift and largely disperse by afternoon, with some sunny spells. Winds less strong than Sunday. Freezing levels above the summits.

Tue 28 Mar 2017

A dry start to the day with light winds and a few early mist or fog patches. Sunny periods deveoping, but there is a risk of some showery rain arriving from the west later in the afternoon. Winds moderate to fresh southerly, with freezing levels above the summits.

Issued at: 0400 on Fri 24 Mar 2017