The Northwest Highlands Forecast
Areas north from Knoydart in the west, and the Great Glen towards the east (NB. Does not include Mull and areas west of Loch Linnhe, these are found in the West Highlands forecast.)
Forecast last updated on Friday 19th December 2014 at 12:40pm
Summary for all mountain areas
Widespread severe upland gales, reaching storm force across the Scottish Highlands. Frequent snow and hail showers on western mountains, threat of lightning, particularly northern Scotland. Fewer showers and more sunshine England & Wales.
Headline for The Northwest Highlands
Severe upland gales. Frequent snow; threat of lightning.
How windy? (On the Munros)
Westerly 50 to 65mph, locally 70mph toward south; gusts 80mph.
Effect of wind on you?
Buffeting from low levels up, and any mobility very difficult on higher areas. Severe wind chill.
Frequent snow and hail; significant risk lightning
Showers, often one after another on western mountains, of hail and snow from just above glens up, particularly away from coast, giving whiteout. High risk thunder. Least precipitation Sutherland.
Cloud on the hills?
Variable; rarely clearing tops
Rapidly changing cloud bases, particularly on western mountains; rarely clearing above 800m and intermittently dropping below 600m.
Chance of cloud free Munros?
20% west; 30% east.
Sunshine and air clarity?
Bursts of sun, mostly toward the east. Visibility good away from showers, but suddenly reduced to near zero by cloud and snow. Slight haze.
How Cold? (at 900m)
All mountain areas of Britain from Saturday 20th December 2014
Few days without gales on the mountains up to Christmas. Precipitation almost daily, particularly western mountains. Freezing levels rising above most mountain tops on Sunday, resulting in a significant thaw. Next week intermittent cycles of freeze and thaw, but frequently below freezing on Scottish summits. Indications favour colder air spreading southwards around or after Christmas Day, with freezing levels dropping significantly, leaving most ground frozen from just above most valleys upwards, and snow falling to lower slopes.