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Northwest Highlands

Confidence

High for favourable conditions dominating Tuesday, then medium for the timing of onset and clearance of the rain late Tuesday and Thursday respectively.

  • Tuesday
  • Wednesday
  • Further outlook

Tuesday 19 September 2017

Weather hazards

Strong sunlight Low likelihood Hide 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.

Forecast

Favouable conditions for most of Tuesday, then turning unsettled from Wedneday.

Weather at 800m

06:00 09:00 12:00 15:00 18:00 21:00
Sunny day Sunny day Sunny day Sunny intervals Sunny intervals Partly cloudy night
00% 00% 00% 00% 00% 00%
Chance of precipitation
1,400 1,400 1,600 2,300 2,800 3,000
Freezing level (m)
The level above which snow is expected to settle or the ground is expected to be frozen

Wind speed and direction (mph) By altitude above mean sea level

06:00 09:00 12:00 15:00 18:00 21:00
1100m SW 11 13 SW 10 13 SW 8 11 S 9 12 S 14 18 SE 20 24
900m SW 11 12 SW 9 11 SW 8 11 S 9 12 S 14 19 SE 20 24
600m SW 7 9 SW 9 11 SW 8 11 S 8 11 S 10 15 SE 14 19
300m W 3 9 SW 2 7 SW 4 10 S 5 10 S 3 10 SE 4 12
Glen NE 1 2 W 1 3 SW 5 9 S 5 10 SE 4 8 E 6 12

Temperature (°C) By altitude above mean sea level

06:00 09:00 12:00 15:00 18:00 21:00
1100m 3 4 5 6 6 7
900m 4 4 6 6 7 7
600m 6 7 8 9 9 9
300m 6 9 12 12 11 10
Glen 8 10 13 14 13 13

Feels like temperature (°C) By altitude above mean sea level

06:00 09:00 12:00 15:00 18:00 21:00
1100m -1 0 2 3 3 2
900m 0 1 3 4 3 3
600m 3 4 6 7 7 6
300m 6 8 11 12 11 10
Glen 7 10 13 14 13 12
Sunrise: 07:00   Sunset: 19:31
Moon phase: Waning crescent

Weather

A chilly start with shallow fog at first in the glens, Plenty of sunshine through the morning, but as higher cloud filters from the west during the afternoon the sunshine will turn hazy. Cloud lowering across western most ranges from late evening, particularly the Cuillins where some patchy rain will develop towards midnight.

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

99% through the day, becoming 40% across far western ranges towards midnight as the general cloud base lowers 600-800m across the Cuillins.

Visibility

Very good or excellent

Met Office Aberdeen meteorologist's view

Temperatures around zero Celsius in the glens at dawn, but soon rising during the morning.

Wednesday 20 September 2017

Sunrise: 07:02   Sunset: 19:28
Moon phase: Waning crescent

Weather

A band of rain will slowly spread from the west during the morning, with some heavier outbreaks developing, particularly across southern routes such as Glenaffric and Glen Shiel. The rain will clear erratically to the east during the afternoon and evening, with scattered showers following.

Temperature

  • At 800m Plus 7C lifting 11C mid-afternoon, lowering Plus 4C later
  • Glen Plus 10C lowering Plus 1C by dawn, lifting Plus 15C mid-afternoon, lowering Plus 11C later
  • Freezing level Above summits lowering 1400m later

Visibility

Moderate or poor, becoming mainly good later.

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

Around 40% through the morning with main bases 600-800m, becoming 65% as rain clears to showers later

Maximum wind speed expected

South to Southwest reaching mean 40-45mph either side of mid-day with gusts 60mph over exposed ridges and summits

Thursday 21 September 2017

Sunrise: 07:04   Sunset: 19:25
Moon phase: New

Overnight rain clears eastwards in the morning with suny spells developing. Showers develop near the coast in the evening, turning heavy with a risk of thunder overnight. Light winds and freezing level above the summits.

Friday 22 September 2017

Sunrise: 07:06   Sunset: 19:22
Moon phase: New

A mostly dry start, but showers near the coast. Low cloud and rain soon spread northeast. Light southwest winds soon strengthen, reach gale force for a time. Freezing level well above the summits.

Saturday 23 September 2017

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

Dry but rather cloud with the best of the sunshine across Sutherland in the morning. Low cloud and rain may affect the west later. Strong southerly winds soon increase to severe gales, perhaps storm force. Freezing levels well above the summits.

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