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Mourne Mountains - Mountain weather forecast

Weather warnings

Warnings affecting Mourne Mountains over the next 5 days

Confidence

High for changeable conditions for the next few days. Low for timing of rain on Tuesday.

  • Sunday
  • Monday
  • Further outlook

Sunday 17 February 2019

Weather hazards

Gales High likelihood Hide detail

Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.

Learn more about gales

Storm force winds Low likelihood Show detail

Storm force winds (gusts over 70mph) make walking very strenuous with any mobility virtually impossible over exposed ground. Where these conditions occur there is a high risk of being blown over and even standing may be impossible at times with a risk of being blown off one’s feet. Basic tasks such as using a map, eating, putting on extra clothing or communication become extremely difficult away from any shelter.

Learn more about storm force winds

Poor visibility Low 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

Headline

Cloudy start with rain, then dry and bright

Weather

06:00 09:00 12:00 15:00 18:00 21:00
Weather at 700m Heavy rain Light rain Sunny day Sunny day Heavy shower night Partly cloudy night
Chance of precipitation at 700m 40% 70% 00% <05% 20% 00%

Wind speed and direction

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m S 52 70 S 35 46 S 29 40 S 32 44 S 35 47 S 36 49
300m S 28 48 S 20 32 S 19 32 S 20 33 S 21 35 S 22 36
Valley S 23 46 S 15 30 S 15 30 S 16 31 S 16 32 S 17 33

Temperature

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m 6 ° 5 ° 5 ° 5 ° 4 ° 4 °
300m 7 ° 7 ° 8 ° 8 ° 7 ° 6 °
Valley 8 ° 8 ° 9 ° 9 ° 8 ° 7 °

Feels like temperature

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

Freezing level

06:00 09:00 12:00 15:00 18:00 21:00
Freezing level i 1,700 m 1,300 m 1,100 m 1,100 m 1,200 m 1,100 m
Sunrise: 07:41
Sunset: 17:36
Moon phase: Full

Weather

Sunday will start off rather cloudy with some occasional rain for a few hours from around dawn. Then becoming dry with cloud breaking and lifting to leave some sunny periods for the rest of the day. Chance of a brief shower later afternoon onwards.

Chance of cloud-free mountain/hill tops at 700m

Widespread cloud down to 450 metres. However cloud clearing from mid-morning with many summits then clear for the rest of the night, some patchy cloud still around at 800 metres.

Visibility

Rather hazy at first, otherwise becoming very good with good air clarity.

Meteorologist's view

Despite a wet start conditions will markedly improve through the morning. Be prepared for summit gales, and indeed storm force winds on the very highest tops at first. Making progress difficult in the wind at height.

Monday 18 February 2019

Sunrise: 07:39
Sunset: 17:38
Moon phase: Full

Weather

Mainly dry in the morning with isolated showers. Showers will become more frequent in the afternoon, some sleet or wet snow likely above 800 metres. Becoming dry in the evening.

Maximum wind speed expected

Southwesterly 30 gust 50 mph, windy at height leading to notable wind chill.

Chance of cloud-free mountain/hill tops at 700m

60%, best chance of cloud free summits likely first thing in the morning and again later in the afternoon and evening. Cloud will lower to 500 metres in the afternoon as showers run through.

Temperature

  • At 700m Plus 4 Celsius
  • Valley Plus 3 rising to 8 Celsius
  • Freezing level 1000 metres

Visibility

Very good but quickly becoming poor in snow

Tuesday 19 February 2019

Sunrise: 07:36
Sunset: 17:40
Moon phase: Full

Dry morning but rain and extensive low cloud developing in the afternoon. Southerly summit gales developing later. Freezing level 1000 metres rising above the summits.

Wednesday 20 February 2019

Sunrise: 07:34
Sunset: 17:42
Moon phase: Full

Cloudy and windy with occasional light rain. Southwesterly summit gales. Freezing level above the summits.

Thursday 21 February 2019

Sunrise: 07:32
Sunset: 17:44
Moon phase: Waning gibbous

Cloudy and dry. Strong southwesterly winds. Freezing level above the summits.

Issued at:
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The Mourne Mountains are a granite mountain range in County Down in the southeast of Northern Ireland, is an area of outstanding natural beauty, and has been proposed as the first National Park in Northern Ireland.

The Mourne Mountains include the highest mountains in Northern Ireland; the highest of these is Slieve Donard standing at 850 metres at the northeastern edge of the Mournes, overlooking Newcastle and Dundrum Bay. At the summit of Slieve Donard there is a cairn and a small stone tower, which is part of the Mourne Wall, which passes over the mountain’s southern and western shoulders.

The Mourne Wall is a 35 kilometre dry stone wall that crosses fifteen summits, constructed between 1904 and 1922 by the Belfast Water Commissioners to define and enclose the catchment area for the newly constructed Silent Valley Reservoir.

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