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Mourne Mountains - Mountain weather forecast

Weather warnings

Warnings affecting Mourne Mountains over the next 5 days

Confidence

High confidence for patchy rain and strong winds on Friday and then wet and very windy through Saturday. Confidence remains high for a fine day on Sunday then medium confidence for the timing of the following rain on Monday.

  • Friday
  • Saturday
  • Further outlook

Friday 14 December 2018

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

Poor visibility High 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

Severe chill effect Medium likelihood Show 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

Headline

Cloudy with rain at times

Weather

06:00 09:00 12:00 15:00 18:00 21:00
Weather at 700m Cloudy Overcast Light rain Sleet shower Sleet shower Sleet shower
Chance of precipitation at 700m 10% 40% 60% 60% 60% 70%

Wind speed and direction

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m SE 33 46 S 34 47 S 33 47 S 34 46 S 37 51 S 38 53
300m SE 18 31 S 20 34 S 21 36 S 22 37 S 24 40 S 25 42
Valley SE 16 31 S 17 33 S 18 36 S 18 36 S 20 40 S 21 41

Temperature

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m 1 ° 1 ° 1 ° 2 ° 2 ° 2 °
300m 4 ° 4 ° 4 ° 4 ° 5 ° 5 °
Valley 5 ° 5 ° 5 ° 6 ° 6 ° 6 °

Feels like temperature

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m -7 ° -7 ° -7 ° -6 ° -6 ° -6 °
300m -2 ° -2 ° -2 ° -2 ° -1 ° -1 °
Valley 0 ° 1 ° 1 ° 1 ° 1 ° 1 °

Freezing level

06:00 09:00 12:00 15:00 18:00 21:00
Freezing level i 700 m 800 m 800 m 900 m 1,000 m 1,000 m
Sunrise: 08:36
Sunset: 16:01
Moon phase: First quarter

Weather

Cloud through the day, but mostly dry for the morning. Outbreaks of rain will develop in the afternoon and lasting into the evening, perhaps some heavier spells of rain in the evening. The high tops above 700m will see some sleet at times but not settling. Winds picking up through the afternoon and evening with gales or perhaps severe gales. Cloud covering the hills with extensive mist.

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

40% at first with only the highest summits shrouded in cloud. The cloud becoming more extensive and lowering through the afternoon with all summits becoming shrouded, with cloud lowering to 500 or 600m

Visibility

Generally hazy with middle distant hills visible. Turning poor in the afternoon as the rain sets in with only nearby hills visible. Very poor across the tops in snow and hill fog.

Meteorologist's view

A gradually deteriorating day with rain setting in and cloud lowering to give widespread hill fog. A severe wind chill across the exposed hills and ridges.

Saturday 15 December 2018

Sunrise: 08:37
Sunset: 16:01
Moon phase: First quarter

Weather

A wet and windy day in store with heavy spells of rain for much of the day with rivers and streams likely to become swollen. Gales at low levels but severe gales across the summits. The rain eases and then clears during the evening.

Maximum wind speed expected

Southeast 40-50mph with gusts 60 or 70mph

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

All summits will be in cloud, with extensive cloud cover down to 300m.

Temperature

  • At 700m Plus 3 Celsius
  • Valley Plus 5 or 6 Celsius
  • Freezing level Above the summits

Visibility

Very poor throughout the day, improving moderate or good in the evening as the rain clears.

Sunday 16 December 2018

Sunrise: 08:38
Sunset: 16:01
Moon phase: First quarter

Clear spells at first with a frost and some icy patches. Dry with sunny spells through much of the day but a chance of a few wintry showers later in the afternoon and evening. Light winds and freezing level around 600m.

Monday 17 December 2018

Sunrise: 08:39
Sunset: 16:01
Moon phase: First quarter

A bright start but cloud quickly thickening with rain spreading from the west in the afternoon then turning heavy at times. Strong winds developing with gales across the summits.

Tuesday 18 December 2018

Sunrise: 08:40
Sunset: 16:01
Moon phase: Waxing gibbous

Remaining windy with further heavy rain and extensive low cloud.

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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