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Snowdonia

Weather hazards over 300m on Thu 19 Jan 2017

High risk

No high risks
none

Medium risk

Persistent extensive hill fog
Some navigation difficulties likely across higher level routes.

Low risk

No low risks
none

No risk

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

Thu 19 Jan 2017

Cloudy through the early hours with extensive hill fog and some drizzle in places. Thursday will start cloudy and misty with widespread hill fog and a little drizzle, or sleet on peaks, but during the day some lifting and thinning of the cloud is expected, giving a few brighter spells by the afternoon. Some cloud breaks likely through the evening.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Mist Mist Cloudy Cloudy Partly cloudy night Partly cloudy night
Precipitation probability
10% 10% 0% 0% 0% 0%

Visibility

Moderate or poor, and very poor in hill fog. Becoming good at times where cloud lifts and thins.

Hill Fog

Occasionally broken or blanket down to 300-400m to start the day, but lifting and thinning in places by the afternoon.

Max wind above 500m

Southeasterly 10 mph

Temperature

Valleys:
Plus 3 becoming Plus 7 Celsius
800m:
Zero Celsius
Freezing level:
Around the summits.

Ground conditions

Date - 15 January 2017 Time - 11.30am Snow Above - 650m Report By - Snowdon Warden Route Taken Pyg Track and Miners Track Conditions Isolated stretches of snow. Depth of snow increases with altitude. Snow drifts in areas. Paths difficult to follow. Pyg Track above 800m remains slippery underfoot due to compacted snow (especially on descent). Kit Advice The following is a list of additional kit required based on the current conditions. Recommended to carry ice axe and crampons. Wear sturdy walking boots. Walking poles for unconsolidated snow. Ski goggles for strong winds and blowing snow. Take waterproofs, hat, gloves and spare warm layers. Additional Information Nil

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.

Fri 20 Jan 2017

Some cloud breaks likely overnight, leading to a frost in places by dawn. Friday should stay dry with some cloud breaks and a few sunny spells, especially in the west. Breezier across the peaks and feeling colder with a significant wind chill.

Visibility

Moderate occasionally poor, but good where cloud breaks occur. Very poor in hill fog.

Hill Fog

Occasionally broken to blanket 400m to start the day, but tending to lift and break during the day.

Max wind above 500m

Southeasterly 20 mph

Temperature

Valleys:
Zero becoming Plus 7 Celsius
800m:
Minus 1 Celsius
Freezing level:
Around 800 metres

Sat 21 Jan 2017

Generally dry and settled with variable cloud amounts, but feeling colder on the hills with increased wind chill in the fresh southeasterly wind. Frosty overnight frost where cloud breaks occur. Temperatures below freezing at altitude.

Sun 22 Jan 2017

Another cold and mostly dry day with some sunny spells after a frost start in places. Winds becoming lighter at elevation so wind chill a little less pronounced. Temperatures below freezing at altitude.

Mon 23 Jan 2017

Similar to Sunday, a cold but pleasant day with moderate southwest winds on the hills and some sunny spells after early frost and the odd fog patch. Temperatures below freezing at altitude.

Issued at: 0353 on Thu 19 Jan 2017