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Snowdonia

Weather hazards over 300m on Wed 29 Mar 2017

High risk

Persistent extensive hill fog
Occasional above 450 metres through the day.

Medium risk

Gales
Winds increasing later in the day with gusts reaching 50-55 mph during the evening.
Heavy persistent rain
Heavy rain during the afternoon and evening may lead to rapid swelling of watercourses

Low risk

Thunderstorms
Isolated lightning possible during the afternoon and evening.

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Severe chill effect
none
Strong sunlight
none

Wed 29 Mar 2017

Cloudy with occasional outbreaks of rain and drizzle and extensive hill fog. During the day, spells of rain, some heavy, are likely to mostly affect western parts, with more sheltered eastern locations perhaps favouring a little better. Some heavy rain at times, especially during the afternoon and evening, and it may be persistent across western upslopes. Strong southwesterly winds increasing to give risk of evening gales across highest tops.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Light rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain
Precipitation probability
60% 80% 80% 80% 80% 70%

Visibility

Moderate to poor in the west, occasionally good in the east. Very poor in hill fog.

Hill Fog

Blanket cloud at times above 450 metres through the day.

Max wind above 500m

Southwesterly with gusts reaching around 55 mph during the evening.

Temperature

Valleys:
Plus 10 Celsius rising to 13 Celsius
800m:
Plus 7 Celsius
Freezing level:
Well above the summits.

Ground conditions

Area - Snowdon Date - 26 March 2017 Time - 11.30am Snow Above - 900m Report By - Snowdon Warden Route Taken - Miners' Path Conditions • Isolated stretches of snow. • Hard snow in places making the paths slippery. Kit Advice The following is a list of additional kit required based on the current conditions. • 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.

Thu 30 Mar 2017

Remaining rather cloudy through the day with further spells of heavy rain, especially in the west. The best chance of drier, brighter conditions in the east. Moderate to strong south or southwesterly winds and remaining mild. Occasional hill fog likely.

Visibility

Moderate to poor in the west during periods of rain. Occasionally very good in the east where it brightens up. Very poor in hill fog.

Hill Fog

Occasional above 350 metres, especially in the west.

Max wind above 500m

Southerly or Southwesterly around 50 mph.

Temperature

Valleys:
Plus 11 Celsius rising to Plus 15 Celsius in any sunnier spells.
800m:
Plus 7 Celsius
Freezing level:
Well above the summits.

Fri 31 Mar 2017

Further persistent rain across the area during Friday morning, with relatively mild conditions and cloud covering peaks. This should eventually clear eastwards to fresher, brighter conditions and scattered showers during the afternoon. Freezing levels above the summits. Strong southerly becoming southwesterly winds.

Sat 01 Apr 2017

Sunshine and scattered showers, perhaps with a risk of thunder during the middle of the day. The showers should start to become lighter or fade away during the afternoon with increasing amounts of sunshine. Moderate southwesterly becoming northwesterly winds. Feeling much cooler and fresher than of late.

Sun 02 Apr 2017

Dry with variable amounts of cloud and some sunshine. Light westerly or northwesterly becoming southwesterly winds by afternoon. Cloud is likely to thicken from the west during the afternoon, but probably remaining dry throughout. Freezing levels close to highest summits at first.

Issued at: 0504 on Wed 29 Mar 2017