Mountain weather

Mourne Mountains

Mourne Mountains Mountain weather forecast table

Confidence

High for the unsettled conditions prevailing during the next 5 days, with wet conditions on Thursday but a drier and brighter Friday.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.

hazard Severe Chill Effect
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.

hazard Gales
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.
hazard Poor Visibility
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.
hazard Heavy Persistent Rain
Heavy and persistent rain can lead to drenched clothing and footwear with waterproofs often becoming soaked through, especially if accompanied by strong winds. This can lead to significant loss of body heat and an increased likelihood of hypothermia. Terrain may turn increasingly boggy underfoot while streams can flood and 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.

Mountain weather forecast

A mainly dry start, but rain arriving late morning, occasionally heavy into the afternoon. Risk of gales on summits and ridges.

Time 06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 700m)
Cloudy Cloudy Light rain Heavy rain Partly cloudy (night) Clear night
Chance of precipitation
(at 700m)
20% 20% 60% 60% 30% 10%

Wind direction and speed (mph)
Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m SW
24
S
36
S
39
S
31
W
26
SW
37
300m SW
9
S
17
S
21
S
17
W
15
SW
18
Valley SW
5
S
13
S
18
S
14
W
12
SW
16
Wind gust (mph)
Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m 33 49 53 42 37 51
300m 20 31 36 29 25 32
Valley 17 30 34 27 24 32

Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m
300m
Valley
Freezing Level
1,000m
1,100m
1,300m
1,300m
900m
700m

Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m
-4°
-2°
-2°
-2°
-5°
-8°
300m
-3°
Valley
-1°

Additional weather information

Meteorologist's view

Strong winds will give a notable wind chill at height, this enhanced by the wet conditions.

Weather

A mainly dry start with a just a few patches of hill fog. Outbreaks of rain arrive by late morning, these perhaps heavy at times. Rain then clears late aftenoon to leave a mainly dry evening. Occasional strong winds at height and a risk of gales on summits and ridges, especially later in the day.

Chance of cloud-free hill tops

40%, best chance in the morning.

Low cloud and visibility

Patches of cloud on higher upslopes in the morning with generally good visibility otherwise. Visibility then deteriorating to a few kilometres or less in outbreaks of rain, with cloud bases occasionally thickening and lowering to 500m, especially on upslopes.

Sunrise:
Sunset:

Mountain weather information

Weather

A bright and very blusterly day with sunny spells and a few showers in the morning, but mainly dry in the afternoon. Gales on upper slopes.

Chance of cloud-free hill tops

70% increasing to 90% by afternoon.

Maximum wind speed expected

Gusting 45-55mph at height.

Temperature

  • At 700m Plus 3 Celsius.
  • Valley Plus 4 rising 7 Celsius.
  • Freezing level Above summits.

Low cloud and visibility

Patches of cloud around 700m in morning showers, otherwise mainly clear with good visbility.

Mountain weather information

Sat 20 Dec

Sunrise:
Sunset:

Strong winds, with gales or severe gales at height in the morning. Mainly cloudy with outbreaks of rain. Freezing level 1200m

Sun 21 Dec

Sunrise:
Sunset:

Fairly cloudy with a few outbreaks of rain. Freezing level 1000m. Moderate to fresh summit winds.

Mon 22 Dec

Sunrise:
Sunset:

Remaining rather cloudy with further outbreaks of rain. Fresh to strong summit winds. freezing level 1400m

Updated at:

Summit specific forecast

Mountain summit forecast map

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