High for Friday and Saturday, moderate for timing of snow and transition to rain Sunday. Low from Monday.
Blizzards and whiteouts present challenging and serious conditions due to a combination of falling or blowing snow, strong winds and cold temperatures. They can be highly disorientating, often resulting in near-zero visibility with limited or no visual references and no distinction between ground and sky. Cliff edges and cornices may not be apparent, even close up. These conditions require very good navigational skills.
Expect snow to rapidly accumulate with deep drifts also possible during windy conditions. Progress will be time consuming and physically strenuous, which will significantly affect the distance one is able to travel on foot. Paths will become hidden and difficult to follow, while very poor visibility during snowfall will make route-finding challenging. A heightened avalanche risk is likely and avalanche reports should be consulted where available.
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.
Lightning is a significant mountain hazard which can result in serious injury or death. Mountain terrain often leaves one highly exposed to lightning strikes. Hail may give unpleasant conditions with torrential rain and localised flash flooding also possible, mainly in Summer months.
Bitterly cold with severe wind chill. Frequent, often heavy snow showers.
|Chance of precipitation|
|1000m||SW 30 35||SW 24 30||SW 23 29||SW 24 30||W 23 29||W 20 26|
|900m||SW 29 34||SW 24 30||SW 22 27||SW 22 28||W 22 28||W 19 25|
|600m||SW 20 25||SW 17 22||SW 16 22||SW 16 22||SW 16 22||SW 14 20|
|300m||SW 6 25||SW 6 22||SW 5 19||W 5 21||W 6 21||SW 4 17|
|Glen||SW 7 17||SW 6 16||SW 6 15||SW 7 17||SW 6 14||SW 5 13|
Frequent, often heavy, snow showers, these merging at times to giving longer spells of snow, blizzards and whiteout conditions across high ground. A risk of hail and perhaps thunder.
10% with cloud generally persistent above 500m, often down to 200-300m in the west.
Very poor, often near zero in frequent snow showers.
Some gusts of 40-45 mph are possible across summits in heavy showers.
Scattered snow showers in the morning, heaviest in the far north. These die out in the afternoon to give a sunny end to the day.
Northwest 15-20 gusting 30 mph, becoming light and variable in the evening.
40% in the morning with frequent cloud above 600m, occasionally dropping to 400m in showers, 60% in the afternoon as cloud thins.
Very good, falling very poor in showers.