Southern Uplands Forecast

Viewing Weather Forecast for Saturday 27th May 2017

The Galloway hills eastward to the Lammermuir hills. The Cheviots (including higher hills within the adjacent Northumberland NP).

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 Southern Uplands

Thunderstorms spreading from south through day.

How windy? (On the summits)

Southeasterly 15 to 25mph morning, strengthening into afternoon, veering westerly 30-35mph, risk locally 40mph later afternoon or evening.

Effect of wind on you?

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

How Wet?

Thunderstorms developing

Much of the morning may escape dry, but an increasing risk of rain spreading from the south, and breaking out into thunderstorms by afternoon, and continuing into evening - giving torrential bursts, setting in for several hours; risk of local flooding, hail and frequent lightning.

Cloud on the hills?

Forming widely in rain

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

Chance of cloud free summits?

60% morning; 30% afternoon.

Sunshine and air clarity?

Any sun soon hazy and fading as high cloud thickens. Visibility initially very good, but deteriorating in rain.

How Cold? (at 750m)

Very warm at 16C or above, but later dropping to 10C from west.

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.