High confidence for the broad weather setup, and for most frequent showers during Wednesday, but lower for details of hill fog and cloud amounts, particularly into the weekend.
Overcast with outbreaks of rain spreading eastwards across all parts, and turning occasionally heavy and persistent over Ben Lawers and the Perthshire and Ochil Hills. Light to moderate southwest winds, backing southeasterly.
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.
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.
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.
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.
Heavy rain and thick cloud slowly clearing through the morning to sunshine and a few heavy showers by afternoon, these turning wintry on summits into the evening.
|Chance of precipitation|
|1100m||SE 11 13||N 10 13||N 12 16||NW 16 22||NW 15 21||W 24 32||W 27 35||W 31 40|
|900m||SE 9 11||N 9 12||N 11 14||NW 14 20||NW 14 19||W 21 29||W 24 32||W 26 35|
|600m||NE 4 6||NE 5 8||N 6 10||NW 10 18||NW 9 17||W 14 26||W 16 29||W 16 26|
|300m||E 4 8||NE 4 9||NW 5 12||NW 9 19||NW 8 18||W 11 23||W 12 26||W 10 22|
|Glen||E 4 8||NE 4 9||NW 4 11||NW 9 19||NW 8 18||W 10 21||W 11 24||W 10 22|
Outbreaks of rain continuing across all parts during the early hours. Through the morning, heaviest rain will die away and skies will slowly brighten, albeit with some continuing patchy rain. Becoming drier and brighter by mid morning with some sunshine into the afternoon, along with scattered blustery showers developing from the northwest, turning heavy at times and falling as sleet or wet snow above around 900m through the evening. Showers most frequent across the Southern Cairngorms and Aberdeenshire Hills and will continue through the evening.
Nil predawn with hill fog down to around 400m quite widely. Improving to 70% by early afternoon with hill fog generally confined above 800m.
Moderate or poor at first, improving to good or very good between showers, but poor within them and increasingly very poor as showers turn wintry through the evening.
Gales penetrating down to around 1100m by late afternoon, aided by heavy showers.
Feeling cold with showers of sleet and snow through the morning and blustery winds continuing through most of the day, these often reaching gale force away from the Ochil Hills. Becoming mainly dry with a good deal of sunshine by midday, but often cloudier during the middle of the day, especially northern ranges. Dry and largely clear through the evening.
Northwesterly 35mph gusting 50mph, easing to 25 gusts 40mph by midnight.
60%, but closer to 80% through the morning and later afternoon. Periods of hill fog above 900m likely through the middle of the day.
Good, occasionally moderate in showers through the morning, then improving to excellent by afternoon with some far reaching views on offer.