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South Grampian and Southeast Highlands - Mountain weather forecast

Weather warnings

Warnings affecting South Grampian and Southeast Highlands over the next 5 days

Confidence

Quite high for a wet night and some rain to start Thursday but lower for the timing of the gradual brightening later Thursday and how far it gets into the far northeast. Reasonable over the weekend, but falling low by Monday.

  • This evening
  • Thursday
  • Friday
  • Further outlook

Wednesday 20 September 2017

Sunset: 19:19
Moon phase: Waning crescent

Cloudy with outbreaks of rain, some heavy and accompanied by fairly widespread poor visibility due to cloud on hills.

Thursday 21 September 2017

Weather hazards

Poor visibility High likelihood Hide detail

Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.

Learn more about poor visibility

Heavy persistent rain Low likelihood Show detail

Prolonged exposure to heavy rain can result in drenched clothing and a risk of hypothermia if not wearing good quality waterproofs. Terrain may turn increasingly boggy underfoot, while mountain streams will rapidly rise into spate and may become impassable. There may also be a risk of flooding in valleys or glens. If there is snow cover, a heightened avalanche hazard is possible and avalanche reports should be consulted where available.

Learn more about heavy persistent rain

Forecast

Cloudy with occasional rain and hill fog, with a gradual improvement spreading in from the southwest later Thursday.

Weather

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Weather at 800m Heavy rain Fog Heavy rain Heavy rain Light rain Light rain Light shower day Clear night
Chance of precipitation at 800m 80% 40% 80% 80% 50% 40% 30% 10%

Wind speed and direction

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
1100m W 9 12 W 10 12 W 6 8 W 6 8 W 12 16 W 17 22 W 16 21 W 16 21
900m W 8 10 W 7 9 W 6 7 W 6 8 W 12 15 W 14 19 W 11 16 W 11 16
600m W 6 8 W 3 6 W 4 6 W 4 6 W 9 14 W 10 16 W 7 12 SW 6 9
300m W 4 9 NW 3 11 NW 2 6 W 2 6 W 7 15 NW 11 21 W 9 18 W 7 14
Glen SW 1 5 S 2 6 S 1 5 SW 3 7 SW 2 8 NW 10 21 W 9 18 SW 3 7

Temperature

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
1100m 7 ° 6 ° 5 ° 5 ° 4 ° 3 ° 3 ° 2 °
900m 9 ° 8 ° 7 ° 7 ° 7 ° 6 ° 5 ° 4 °
600m 10 ° 9 ° 9 ° 9 ° 8 ° 8 ° 8 ° 6 °
300m 12 ° 11 ° 11 ° 10 ° 12 ° 11 ° 10 ° 8 °
Glen 12 ° 12 ° 11 ° 11 ° 12 ° 13 ° 11 ° 9 °

Feels like temperature

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
1100m 5 ° 3 ° 3 ° 3 ° 0 ° -2 ° -3 ° -3 °
900m 7 ° 6 ° 5 ° 5 ° 3 ° 2 ° 2 ° 0 °
600m 9 ° 8 ° 8 ° 8 ° 6 ° 6 ° 6 ° 4 °
300m 12 ° 11 ° 10 ° 10 ° 10 ° 9 ° 8 ° 6 °
Glen 12 ° 12 ° 11 ° 11 ° 12 ° 11 ° 10 ° 8 °

Freezing level

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Freezing level i 2,700 m 2,500 m 2,400 m 2,300 m 2,100 m 1,700 m 1,500 m 1,200 m
Sunrise: 06:56
Sunset: 19:17
Moon phase: New

Weather

Cloudy with further rain at times, with some heavy bursts possible in the morning, turning lighter and more patchy in the afternoon. Some brighter weather will push into the south and west of the area towards evening but the Aberdeenshire Hills will probably see little improvement before nightfall.

Chance of cloud-free mountain/hill tops at 800m

10% or less overnight and into the morning with cloud widely down to 450-600m, then increasing to 40% in the south and west from mid afternoon and 70% by evening, though a slower improvement over the Aberdeenshire Hills, probably not until after dark..

Visibility

Even below the cloud, outbreaks of rain and mist will give moderate, occasionally poor visibility until later, then visibility will improve to generally good or very good in the drier brighter weather reaching at least the south and west of the area.

Met Office Aberdeen meteorologist's view

The lowest freezing levels in the late evening will be associated with drier clearer conditions.

Friday 22 September 2017

Sunrise: 06:58
Sunset: 19:14
Moon phase: New

Weather

A cold night with perhaps a touch of frost in some glens. Then a dry start to Friday with some early sunny intervals especially in the north. Cloud will soon thicken and lower onto the higher or more southern hills, also bringing some outbreaks of rain by the late morning. A few heavy bursts are possible for a time towards Ben Lawers and Breadalbane before it turns light and patchy during the evening. Some clear spells will then develop across the north but some low cloud will linger across Lochnagar and over the Perthshire Hills.

Temperature

  • At 800m Plus 4 Celsius rising to Plus 8 Celsius during the day.
  • Glen Down to 0 Celsius in places overnight and early in the day gradually rising to Plus 12 during the day.
  • Freezing level 1300m overnight and early morning rising above the summits from mid morning

Visibility

Starting off very good, away from any glen mist, falling moderate in rain, also some cloud on hills causing very poor visibility at height.

Chance of cloud-free mountain/hill tops at 800m

90% in early hours and into the first party of the morning falling to 20% in south and 50% in north from late morning until early evening, rising 40% in south and 80% in north in the evening,

Maximum wind speed expected

Strengthening southerly winds, with gale force summit winds from late morning around 45mph gusts 55-60mph, easing a little in the evening.

Saturday 23 September 2017

Sunrise: 07:00
Sunset: 19:11
Moon phase: New

A dry start then becoming cloudy, perhaps with a little light rain from mid morning to mid afternoon mainly in the south. Also cloud lowering onto hills. An improvement from mid afternoon with any rain clearing and increasing cloud breaks. A much windier day on the mountains with storm force southerlies expected on Lochnagar from late morning and severe gales on lower Munros. Freezing levels will be well above the tops.

Sunday 24 September 2017

Sunrise: 07:02
Sunset: 19:08
Moon phase: New

Cloud thickening again overnight to bring some light rain, and cloud back down on the hills but an improvement expected in the morning with some sunshine breaking through and just the odd shower in the west. Overnight severe gales subsiding by morning with a fresh to strong southerly expected on the summits during the day. Some uncertainties about the timing of the clearance of this cloud and rain. Freezing levels well above the tops.

Monday 25 September 2017

Sunrise: 07:04
Sunset: 19:06
Moon phase: Waxing crescent

Confidence is low but the most likely scenario is for a dry day with some bright or sunny spells and a fresh to strong southerly breeze on the tops. The alternative scenario is for the rainband to return from the southeast, so regular checking of the forecast is advised.

Issued at:
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Includes South and East Cairngorms National Park, Aberdeenshire and Angus hills, Ben Vrackie, Ben Lawers, Loch Tay and Ochils

The Ochil Hills are a long range of steeply sided, round topped hills, stretching 25 miles from the Firth of Tay to Stirling. There are many peaks over 600 metres offering splendid views across central Scotland and to the north, with Ben Cleuch the highest at 721 metres.

Loch Tay is a freshwater loch in the central highlands and is around 15 miles long. At around 150 metres deep it is one of the deepest in Scotland. At 1,214 metres Ben Lawers is the highest point along the ridge on the north shore that includes seven Munros (mountains over 3,000 ft).

For snow and avalanche hazard forecasts please visit Sportscotland Avalanche Information Service

 

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