The Northwest Highlands Forecast
Viewing Weather Forecast for Monday 24th April 2017
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 Monday 24th April 2017 at 7:07am
Summary for all mountain areas
A cold front passing southwards brings a marked change to Arctic air. Heavy showers of snow and hail spread from the north, merging into constant precipitation for several hours in Scotland. Winds up to gale force. Whiteout and severe wind chill Scottish mountains.
Headline for The Northwest Highlands
Very cold. Snow & hail at times constant. Periods of gales.
How windy? (On the Munros)
Wind will vary considerably and abruptly: northwesterly, most frequently 20-30mph, briefly less, but at times up to 55mph.
Effect of wind on you?
Occasionally small, but expect periods of very difficult walking and severe wind chill.
Frequent hail & snow, setting in for several hours. Risk lightning.
Ranging from sudden heavy but fairly brief hail and snow showers with risk thunder to an hour or two of almost constant sometimes heavy snow, giving whiteout. The most severe conditions focused on the morning, then again by evening.
Cloud on the hills?
Sometimes the summits nearly all cloud free. But expect sudden changes; near showers cloud temporarily below 600m, and sometimes constant cloud above about 500m.
Chance of cloud free Munros?
Sunshine and air clarity?
Bursts of sunshine and sometimes excellent visibility. But periods of dense fog on the hills, giving near zero visibility in snow/blowing snow.
How Cold? (at 900m)
Varying between -2 and -5C; coldest middle of day. Where directly exposed to strongest wind, feeling like -20 Celsius.
Varying between temporarily 250m to most often 500 to 650m.
All mountain areas of Britain from Tuesday 25th April 2017
An Arctic air mass encompasses the British Isles bringing winter-like conditions during midweek. Freezing levels will be very low. Widespread snow and hail showers, sometimes frequent, or near constant northern Scotland. Significant wind chill. Less cold from about Thursday onward as winds back westerly. Frontal systems moving in from the Atlantic are likely to bring periods of rain and upland gales heading into the May Day weekend, although a gradual improvement may develop.