High for becoming cloudy with rain at times on Wednesday but becoming lower from Thursday regarding details and timing of precipitation due to uncertainties regarding development and movement of a low over the western UK.
Dry and clear. Occasionally fresh westerly winds.
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.
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.
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.
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.
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.
Dry start but increasing cloud brings outbreaks of rain and snow. Strengthening westerly winds.
|Chance of precipitation|
|600m||W 9 14||W 10 16||W 10 16||W 14 20||W 19 28||W 22 32||W 21 31||W 20 29|
|300m||W 4 11||W 5 13||W 5 13||W 9 18||W 13 26||W 14 28||W 14 29||W 12 26|
|Valley||W 2 6||W 2 6||SE 2 5||SW 4 10||W 11 23||SW 10 23||SW 9 22||SW 8 19|
Remaining dry but cloud slowly increasing through the early hours, although clear spells may lead to some low level fog patches developing towards dawn. Some brightness at first, especially in the east, but cloud continues to increase through the morning bringing outbreaks of snow from around midday. During the afternoon the snow turns increasingly to rain at all levels, the rain becoming occasionally heavy. The evening remains cloudy with rain generally turning lighter and patchier.
Around 80% through the morning with just patches of cloud above about 600m but falling to around 25% over as cloud becomes periods or persistent above 600m and lowers to 450m at times in across western hills.
Good or very good through the morning, although several hundred metres in early low level fog patches and cloud, becoming several kilometres in rain and light snow, and perhaps a kilometre or less in any heavier snow over western summits.
Winds expected to gust to around 40mph over ridges and summits during the afternoon and evening. Thaw of lying snow expected through the evening.
Rainfall data provided by the Environment Agency. The Met Office is not responsible for content provided by third parties and may remove this data without warning.
Outbreaks of rain largely dying out overnight but remaining rather cloudy, best of any brightness in the east, with patchy drizzle through the rest of the morning. More persistent and occasionally heavy rain arrives during the evening.
Westerly backing southerly 20-25mph, gusts around 40mph possible over ridges and summits at first and again later.
Around 25% with periods above about 600m, but rising to around 75% during the afternoon with cloud breaking and perhaps lifting above the summits for a time in the afternoon.
Very poor in cloud otherwise good or very good falling to several kilometres in rain and drizzle.