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Snowdonia

Weather hazards over 300m on Thu 02 Apr 2015

High risk

Persistent extensive hill fog
Widespread cloud above 500m most of the day with extremely poor visibility.

Medium risk

No medium risks
none

Low risk

Blizzards
Rain likely falling as snow over the summits at very first, with blizzards in northwesterly winds.
Severe chill effect
Cold at first in northwesterly winds and rain, with temperatures feeling closer to -8C at summits.
Heavy persistent rain
Rain on and off through the day but turning persistent and occasionally heavy in the evening.

No risk

Heavy snow
none
Storm force winds
none
Gales
none
Thunderstorms
none
Strong sunlight
none

Thu 02 Apr 2015

A dull and cloudy day with extensive hill fog throughout. There will be outbreaks of rain on and off, but turning heavier and more persistent from the evening. The rain at very first will fall as snow above 600m and may be blown around by a strong northwesterly breeze creating blizzard conditions. winds will ease and become light through the morning, but picking up again in the evening.

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
Light rain Light rain Cloudy Cloudy Cloudy Light rain Heavy rain Heavy rain
Precipitation probability
70% 50% 30% 20% 40% 80% 80% 80%

Visibility

Moderate or poor in the rain , locally very poor in any snow over the summits at first. Temporarily improving to good in the slightly drier period during the morning.

Hill Fog

Widespread and extensive hill fog above 500m with periods of broken hill fog above 300m and occasional patches to 100m in the heavy rain later.

Max wind above 500m

Northwesterly 30mph gusts 40mph, easing to easterly 5-10mph, then increasing southerly 20mph gusts 30-35mph from evening.

Temperature

Valleys:
Around plus 7 Celsius.
800m:
Minus 2 Celsius becoming plus 2 Celsius.
Freezing level:
700-800m, rising above the summits.

Ground conditions

Latest: Date of observations: 31st March 2015 Observation made on: Snowdon. Time of observation: 2:00 PM. Winter conditions above: 900m. Ground Conditions: Isolated patches of snow, Light dusting of hail/snow, Streams and wet areas are frozen, Wet surfaces are coated in ice. Observations on: Snowdon / PyG Track. Observation Text: Isolated patches of old snow can be avoided with care on the PyG Track. Conditions changeable with snow/hail showers leaving a dusting on the mountain. Crampons might be useful if showers become more persisent and snow/hail accumulates. Kit Advice: Wear sturdy walking boots, Walking poles can provide an aid to balance and security when walking through unconsolidated snow, Ski goggles can aid visibility in strong winds and blowing 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.

Issued at: 1700 on Wed 01 Apr 2015

Fri 03 Apr 2015

Cloudy with extensive hill fog and continued outbreaks of rain, these are likely to be heavy at times, especially on west-facing hills. These should become more fractured and lighter after dawn with drier conditions building in by the afternoon. The cloud will lift and break with the occasional bright spell, but it will still be fairly cloudy with some hill fog. Around the same time the winds will turn northwesterly and increase too with gales developing.

Visibility

Moderate or poor in the rain, locally very poor in any heavy rain. Improving to very good as the rain passes, perhaps becoming excellent for a short while.

Hill Fog

Widespread and extensive hill fog above 500m with periods of broken hill fog above 300m and occasional patches to 100m in the heavy rain through the first half of the morning, then the cloud breaking and lifting as the rain clears leaving periods of broken hill fog above 600m through the rest of the day.

Max wind above 500m

Southerly 20mph gusts 30-35mph, becoming northwesterly 30mph gusts 50-55mph later.

Temperature

Valleys:
Plus 7 Celsius rising to plus 11 Celsius, falling to plus 6 Celsius later.
800m:
Plus 2 Celsius falling to minus 1 Celsius later.
Freezing level:
Above the summits, falling to 900m later.

Issued at: 1700 on Wed 01 Apr 2015

Sat 04 Apr 2015

Dry and generally cloudy with the some sunny spells. The sunlight will be strong under any prolonged spells. Northwesterly gales will cease as winds decrease. freezing level 900m rising above the summits in the morning.

Issued at: 1700 on Wed 01 Apr 2015

Sun 05 Apr 2015

Easter Sunday will be similar to Saturday with dry but cloudy conditions with some sunny spells and it will feel warm under these. Winds will be mostly light and the freezing level will sit above the summits.

Issued at: 1700 on Wed 01 Apr 2015

Mon 06 Apr 2015

Bank Holiday Monday will be yet another repeat of the previous two days in the Easter weekend with dry but cloudy conditions, light winds, and some sunshine possible. Freezing level above the summits.

Issued at: 1700 on Wed 01 Apr 2015