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yellow Warnings have been issued for the United Kingdom

West Highlands

Weather hazards over 300m on Fri 30 Jan 2015

High risk

Severe chill effect
Gale force winds with summit temperatures well below freezing.

Medium risk

Gales
Over the higher summits and ridges

Low risk

Blizzards
Snow showers with gale force winds blowing the lying snow.
Heavy snow
Possible across the northern ranges at times
Storm force winds
Occasional gusts to 70 mph across the more northern ranges
Persistent extensive hill fog
Across some northern ridges through Friday
Thunderstorms
Isolated lightning strikes possible across the northwest
Strong sunlight
Risk of glare from fresh snow across the south

No risk

Heavy persistent rain
none

Fri 30 Jan 2015

The walking day will start very cold and icy with snow showers across the Northwest Highlands, drier southwest of the Great Glen. Then northern ranges will see fairly cloudy skies at times with frequent snow showers, these leading to a fresh build of snow covering any new tracks. Across the Trossachs there'll be fewer snow showers and more sunshine, and the Nevis ranges will see some drier interludes at times too. Strong winds will lead to blowing snow and reduced visibility.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Heavy snow shower night Heavy snow shower day Heavy snow shower day Heavy snow shower night Heavy snow shower night Heavy snow shower night
Precipitation probability
30-50% 30-50% 30-50% 30-50% 10-30% 10-30%

Visibility

Mostly very good, but poor or nil in showers and any blowing snow.

Hill Fog

Down to 500 or 600 metres in snow showers across the north, becoming persistent at times along northern upslopes.

Max wind above 600m

North or northwest 30 to 35 mph with gusts to 50 mph quite widely, and mean speeds 45 mph gust 70 over the highest tops. Winds easing across the southeast of the area from late afternoon.

Temperature

Valleys:
Minus 5 rising to Plus 2 Celsius.
800m:
Minus 2 Celsius
Freezing level:
200 metres or less rising to around 400 metres, perhaps 600 metres along the west coast.

Issued at: 0331 on Fri 30 Jan 2015

Sat 31 Jan 2015

A spell of rather more widespread and heavy snow with blizzard conditions is possible during Saturday morning, again especially across the north. This will ease away southwards through the afternoon but still a fair number of snow showers still expected, these chiefly across the north and east. Snow blowing around in severe gale force winds at times.

Visibility

Very poor or nil in snow, else moderate or good.

Hill Fog

Becoming extensive around 400 metres in any persistent snow, else patches down to 600 metres.

Max wind above 600m

Northerly 35 to 45 mph with gusts to 65 mph, perhaps 80 to 90 mph across the higher tops.

Temperature

Valleys:
Minus 3 Celsius rising to freezing.
800m:
Minus 3 Celsius
Freezing level:
400 metres but possibly rising to 700 metres across the east for a time in the middle of the day. Lowering below 200 metres later.

Issued at: 0331 on Fri 30 Jan 2015

Sun 01 Feb 2015

Frequent and heavy snow or hail showers in the north with drier and brighter conditions across more southern ranges. Severe gale force northerly winds, perhaps storm force for a time over summits. Freezing levels below 300m decreasing to sea level.

Issued at: 0331 on Fri 30 Jan 2015

Mon 02 Feb 2015

Remaining bitterly cold with further snow showers being driven across most ranges on a severe gale force north or northwesterly wind. However, the snow showers will be less frequent in the south where some sunny spells are likely. Freezing level down to sea level.

Issued at: 0331 on Fri 30 Jan 2015

Tue 03 Feb 2015

Snow showers are expected to affect northern areas with sunny periods further south. It will continue to feel bitterly cold in subzero temperatures and a fresh or strong north or northwesterly wind which increases to gale force later over summits. Freezing level down to sea level.

Issued at: 0331 on Fri 30 Jan 2015