The Northwest Highlands Forecast

Viewing Weather Forecast for Saturday 27th May 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.)

Today | Sunday | Monday

Forecast last updated on Friday 26th May 2017 at 4:27pm

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 The Northwest Highlands

Thunderstorms spreading from south through day.

How windy? (On the Munros)

Southerly 15 to 25mph early morning, then variable, perhaps little wind for several hours, but toward evening may suddenly strengthen northwesterly 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 until afternoon. Then rain will spread from south, becoming torrential in places - most widespread toward evening, setting in for several hours; risk of localised flooding, hail and frequent lightning.

Cloud on the hills?

Very little prior to rain

Most mountains likely free of low cloud much of the day, but as rain sets in, will form increasingly on the hills, in places from forest canopies up.

Chance of cloud free Munros?

80%

Sunshine and air clarity?

Hazy sun, fading as high cloud thickens. Visibility very good or excellent, 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.