Cairngorms NP and Monadhliath Forecast

Viewing Weather Forecast for Saturday 27th May 2017

Cairngorms National Park and Monadhliath. Also includes the Ben Alder area hills between Loch Ericht and Loch Laggan.

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 Cairngorms NP and Monadhliath

Thunderstorms spreading from south through day.

How windy? (On the Munros)

East to southeasterly, speeds may vary, at times very light, but often 20 to 30mph. Late in day, risk suddenly strengthening westerly up to 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

Banks of cloud may cover areas toward Deeside all day, but elsewhere starting clear. Then as rain sets in, will form increasingly on the hills, in places from forest canopies up.

Chance of cloud free Munros?

70% later 30% most areas; but 20% all day Deeside.

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.