MOUNTAIN WEATHER INFORMATION SERVICE www.mwis.org.uk The Northwest Highlands

Areas north from in the west, and the towards the east (NB. Does not include Mull and areas west of Loch Linnhe, these are found in the West Highlands forecast.)

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General Summary for Thursday, 22 October, 2020

British Mountain Summary: Based on forecast chart for noon 22 October, 2020 Despite an approaching ridge of high pressure, the remnants of fronts, will mean only a slow, although sustained improvement after extensive low cloud and patches of rain from dawn - particularly so central Britain. Strong winds will ease; becoming very light in .

Headline for The Northwest Highlands Gradually improving: extensive very low cloud and patches of rain clearing. Detailed Forecast for Thursday, 22 October, 2020

How windy? (On the Northwest or northerly 10 to 20mph at dawn, perhaps 30mph Skye. ) Will slowly drop to become extensively less than 10mph by afternoon.

Effect of wind on Becoming negligible you?

How wet? Snow (rain lower slopes) gradually fizzling out by about late morning. (Precipitation and its Overnight precipitation, snow above 700m, will be fizzling out, but after dawn still impact) patches here and there. By midday very likely dry apart from possibly a few isolated pockets left.

Cloud on the hills? Very extensive at dawn; improving, many tops eventually clearing Some breaks from dawn to higher tops particularly mainland south of . But overall, the hills starting foggy. Slowly the cloud will fragment, by mid afternoon, only fragments below 750m and summits up to 1050m increasingly clearing Chance of cloud Less than 10% post dawn, 60% from mid afternoon free Munros?

Sunshine? Bursts of sunshine increasingly coming through; fairly extensive sun toward evening. Air clarity (below Fairly widely misty at first, but gradually visibility becoming excellent, perhaps superb. cloud)

How Cold? (at 900m) 0C

Freezing Level 950m.

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The Northwest Highlands - Looking Ahead

Friday 23 October Saturday 24 October

How windy? (On the Southwesterly, after dawn typically 40mph, Southerly typically 65mph, easing to 45mph Munros) then after a slight lull, through afternoon, middle of day after perhaps a brief slight lull. 30mph. Effect of wind on Walking at times arduous on higher Any mobility difficult and wind chill you? areas, particularly after dawn and again severe where exposed on higher areas, later in day. sudden gusts at times some lower slopes. How wet? Showery; snow higher slopes Rain, mainly morning (Precipitation and its Rain after dawn will clear within 2 or 3 Widely constant rain, although often light impact) hours. north of Torridon. After a break in the rain, Then increasingly showery, the showers showers, frequent western mountains south becoming heavy through afternoon, with of , will follow in the afternoon. hail and above 900m, later 600m snow. Snow above 1100m, later 800m.

Cloud on the hills? Extensive on higher areas Extensive on higher areas

Cloud forming lower slopes at first many Blanket fog on and near Skye and areas, particularly toward west coast. westernmost summits Wester Ross By late morning, typical cloud base 650m morning. to 850m, highest well inland where a few Otherwise, varied cloud base, occasionally breaks to higher tops. below 500m, but typically 700-900m However, near showers, cloud base will generally highest /areas north of drop to 450 to 600m. Torridon. Chance of cloud 20% 20% free Munros? Sunshine? Bursts of sunshine after a dull misty start; Rare glimpses of sun north of Torridon and Air clarity (below the sun mainly well inland. lower slopes Ben Wyvis. cloud) Varied visibility; often very good or Visibility very poor in heavy rain, but excellent, but poor in precipitation. otherwise good north of Torridon and at times afternoon. How Cold? (at Typically 2C; will tend to drop toward 0C 2C; tending to drop through the day. 900m) through day.

Freezing Level 1300m dropping toward 900m by late Above the summits morning, then dropping afternoon. toward 1000m.

Planning Outlook All mountain areas of Britain from Friday, 23 October, 2020 A series of often intense lows will come in off the Atlantic, bringing periods of storm force winds to all mountain areas from the weekend. Rain will fall almost daily, particularly on western mountains, where considerable total rainfall. On higher areas, mainly the , snow will fall intermittently.

Forecast issued at 7:21 on Thursday, 22 October, 2020 The production of the Scottish forecasts is fully funded by the Scottish Government through Mountaineering Scotland with the support of sportscotland. Forecasts are issued daily by 16:30 and are kept under review and amended as necessary. However, expected conditions can still change after issue. © Copyright Mountain Weather Information Service, 2020.

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