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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

High until midweek then low regarding fronts pushing in from the Atlantic later in the week, and for freezing levels on Thursday

  • Monday
  • Tuesday
  • Further outlook

Monday 10 December 2018

Weather hazards

Severe chill effect Medium likelihood Hide detail

Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.

Learn more about severe chill effect

Poor visibility Medium likelihood Show 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

Strong sunlight Low likelihood Show detail

Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.

Learn more about strong sunlight

Headline

Daylight hours dry with some sunshine this turning hazy as high cloud thickens. Cold but winds becoming mainly light.

Weather

06:00 09:00 12:00 15:00 18:00 21:00
Weather at 800m Partly cloudy night Sunny day Sunny day Sunny intervals Cloudy Cloudy
Chance of precipitation at 800m <05% 00% 00% 00% <05% <05%

Wind speed and direction

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
1100m NW 24 28 W 20 23 W 16 18 W 11 13 S 7 8 S 10 12
900m NW 16 19 W 13 16 W 11 14 W 8 10 S 6 8 S 8 10
600m NW 10 15 W 10 14 W 8 10 W 6 8 SE 2 4 SE 2 4
300m W 4 10 W 7 13 W 3 8 W 3 6 W 2 6 SW 1 3
Glen W 4 14 SW 4 10 SW 3 6 W 3 6 W 2 5 W 1 3

Temperature

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
1100m -5 ° -5 ° -5 ° -4 ° -3 ° -2 °
900m -3 ° -3 ° -3 ° -3 ° -2 ° -1 °
600m -1 ° -1 ° 0 ° -1 ° -1 ° -1 °
300m 1 ° 0 ° 2 ° 0 ° -1 ° -1 °
Glen 0 ° 0 ° 2 ° 0 ° -1 ° -1 °

Feels like temperature

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
1100m -13 ° -13 ° -12 ° -10 ° -7 ° -7 °
900m -9 ° -9 ° -8 ° -7 ° -6 ° -5 °
600m -5 ° -6 ° -4 ° -4 ° -3 ° -3 °
300m -1 ° -3 ° 0 ° -2 ° -3 ° -3 °
Glen -2 ° -2 ° 0 ° -1 ° -2 ° -3 °

Freezing level

06:00 09:00 12:00 15:00 18:00 21:00
Freezing level i 300 m 200 m 300 m 200 m 200 m 200 m
Sunrise: 08:39
Sunset: 15:33
Moon phase: Waxing crescent

Weather

Daylight hours dry with some long sunny spells, these turning hazy in the afternoon as high cloud arrives. Cloud thickening and lowering in the evening though staying broken to the north of Lochnagar.

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

90% or more during the day, with most cloud well above the tops. Chances decreasing 20% or less in the second half of the evening as extensive cloud at 600-750m reaches all but the far northeast.

Visibility

Good clarity to the airmass during daylight with distant hills easily seen, though some haziness at lower levels in the south especially around the Ochils.

Met Office Aberdeen meteorologist's view

Very low feels like temperatures on the summits at first.

Tuesday 11 December 2018

Sunrise: 08:40
Sunset: 15:33
Moon phase: Waxing crescent

Weather

Generally cloudy overnight with extensive hill fog and the odd patch of light rain or drizzle, and most remaining cloudy during the day. However it may break up to the north of Lochnagar and west of Ben Lawers with some sunny spells. The exact boundary of this will depend on the depth of the cloud.

Maximum wind speed expected

Southerly 30 gusts 40mph increasing 40 gusts 55mph in the evening.

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

20% or less generally, but rising to 60% in the far north and west with a good chance of becoming clear.

Temperature

  • At 800m Plus 2 Celsius rising to Plus 4 Celsius in the south and Plus 7 in some sunnier northern slopes.
  • Glen Plus 2 overnight, perhaps dipping to Minus 2 under clearing skies in the north around dawn. Then rising to around 4 Celsius during the day.
  • Freezing level 1100m at midnight rising above summits in the early hours.

Visibility

Occasionally poor in overnight drizzle and rather hazy and misty during the day but becoming very good in the sunnier north and west with distant hills further towards that direction becoming easily seen.

Wednesday 12 December 2018

Sunrise: 08:42
Sunset: 15:33
Moon phase: Waxing crescent

Cloudier generally, though still a few brighter spells to the north of Lochnagar. Occasional rain or drizzle perhaps turning to snow above 900m by midnight. Strengthening winds with severe gale force south to southeasterlies on the tops by evening.

Thursday 13 December 2018

Sunrise: 08:43
Sunset: 15:32
Moon phase: Waxing crescent

Low confidence. Winds continuing to increase, to storm force. Cloudy, with patchy rain and mountain snow, turning heavier later with blizzard conditions developing. Some uncertainty on how low the snow level will get, and even the arrival time of the snow.

Friday 14 December 2018

Sunrise: 08:44
Sunset: 15:32
Moon phase: First quarter

Very low confidence in detail. Most likely to be cloudy with strong to gale southerly winds, and some occasional, mainly light rain and hill snow.

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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