West Highlands Forecast

Western Highlands accessible from, and south of, Glenfinnan (Road to the Isles) and Glen Spean (includes Creag Meagaidh). This area include Ben Nevis and the mountains around Glencoe. In the east, includes Ben Alder south to Loch Lomond and Trossachs NP. Includes Arran and Mull.

Viewing Weather Forecast for Saturday 27th May 2017
Forecast last updated on Friday 26th May 2017 at 4:27pm

Today | Sunday | Monday

Summary for all mountain areas

An active frontal zone will spread north-eastwards through the day, triggering thunderstorms - torrential rain, hail and frequent lightning, plus sudden gusty winds. The Scottish Highlands will generally deteriorate by afternoon onward. Meanwhile, Wales will generally improve.

Headline for West Highlands

Thunderstorms spreading from south through day.

How windy? (On the Munros)

Southeasterly 15 to 25mph early morning, then variable, perhaps little wind for several hours, but late afternoon may suddenly strengthen westerly 30 to locally 40-50mph, sudden gusts.

Effect of wind on you?

Often fairly small, but risk of sudden powerful gusts developing to low levels, particularly later in day and around thunderstorms.

How Wet?

Thunderstorms developing, mostly afternoon and evening

Isolated risk of a thunderstorm breaking out in first half of the day, but most places likely dry in morning. By about midday, rain spreads from south, torrential in places - most widespread later afternoon, setting in for several hours; risk of localised flooding, hail & frequent lightning.

Cloud on the hills?

Very little prior to rain

Many mountains may be free of low cloud in morning, especially in north & west. Then as rain sets in, will form increasingly on the hills, in places from forest canopies up.

Chance of cloud free Munros?

70% morning; 30% afternoon.

Sunshine and air clarity?

Hazy sun soon fading as high cloud thickens. Visibility very good, but deteriorating in rain.

How Cold? (at 900m)

Very warm at 15C or above, but later dropping to 10C or lower in rain.

Freezing Level

Above the summits

Planning Outlook

All mountain areas of Britain from Sunday 28th May 2017

Following Saturday's thundery breakdown, most areas will be dry into Sunday, and cooler than previous days. On Monday, there is a risk of further thundery rain extending from the south, although detail is uncertain. For the rest of the week, high pressure will be to the south & south-east, allowing some dry and bright days, but fronts will try and encroach from the Atlantic, bringing occasional rain to mainly western Scotland. A generally more unsettled pattern is likely to develop as the week progresses, with rain becoming more frequent, and winds strengthening at times.

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