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yellow Warnings have been issued for the United Kingdom

Snowdonia

Weather hazards over 300m on Sat 28 Feb 2015

High risk

Storm force winds
Winds easing in the morning then strengthening during afternoon, with gusts > 80 mph over summits.
Gales
Gales over the summits during the early hours, then widespread gales to all levels from lunchtime.
Severe chill effect
Very strong winds will make it feel close to minus 10 Celsius.
Persistent extensive hill fog
Widespread hill fog above 500m, occasionally down as low as 200m, particularly in the west.

Medium risk

Blizzards
Temporarily over the summits just after midnight, then again around lunchtime.
Heavy snow
Heavy snow over the summits just after midnight, then again around lunchtime.
Heavy persistent rain
Patchy outbreaks of rain/drizzle becoming heavy and persistent later in the day.

Low risk

No low risks
none

No risk

Thunderstorms
none
Strong sunlight
none

Sat 28 Feb 2015

It is going to be windy at first with some outbreaks of rain and drizzle. Over the summits gales are likely and some snow is possible bringing temporary blizzard conditions. Through the morning the winds should ease a little, but it will remain rather cloudy with hill fog and further rain or drizzle at times. During the afternoon the rain/sleet is set to turn heavy and more persistent, with some heavy snow over the summits at first, again bringing blizzard conditions. The winds will also strengthen reaching storm force in exposed parts.

Time
0000 to 0300 0300 to 0600 0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Light rain Cloudy Cloudy Cloudy Sleet Heavy rain Heavy rain Cloudy
Precipitation probability
40% 30% 20% 20% 60% 90% 70% 30%

Visibility

Moderate, perhaps glimpses of good in the morning, especially in the east. Turning poor in strong winds, rain, and sleet during the afternoon and very poor to near zero in hill fog.

Hill Fog

Widespread hill fog above 500m, occasionally down as low as 200m, particularly in the west.

Max wind above 500m

Southwesterly 40mph, with gusts 60mph at first, easing to southwesterly 25 with gusts 45mph by midday, but increasing to southwesterly 50mph with gusts 85mph by dusk.

Temperature

Valleys:
Plus 3 Celsius, increasing plus 6 Celsius.
800m:
Plus 1 Celsius.
Freezing level:
Around the summits at first, rising just above during the afternoon.

Ground conditions

Latest: 2/26/2015 14:39:09 Date of observations: 2/26 Observation made on: Snowdon Time of observation: 12:30:00pm Winter conditions above: 700m Ground Conditions: Isolated stretches of snow, Depth of snow increases with height, Snow drifts in areas, Slopes and paths covered in hard snow and ice Observations on: Snowdon (PyG Track) Observation Text: Upper section of Pyg Track (Zig-zags to Bwlch Glas) covered in hard compacted snow. Path is covered in deep snow making the path less than a foot wide in places. Kit Advice: Ice axe and crampons essential, Wear crampon compatible boots, Walking poles can provide an aid to balance and security when walking through unconsolidated snow, Take waterproofs, hat, gloves and spare warm layers.

Issued at: 1515 on Fri 27 Feb 2015

Sun 01 Mar 2015

Very windy through the first half the day with winds becoming slightly less strong during the afternoon. Some heavy showers, often wintry, especially over high ground, with a few bright or sunny spells in between. Feeling very cold in exposure.

Visibility

Generally good or very good but reduced greatly in any showers or hill fog.

Hill Fog

Isolated patches around the summits.

Max wind above 500m

Southwest becoming southwesterly meaning 40 mph with gusts 70 -80 mph. Gradually easing through the day.

Temperature

Valleys:
Plus 2 Celsius.
800m:
Minus 3 Celsius.
Freezing level:
Around 600m.

Issued at: 1515 on Fri 27 Feb 2015

Mon 02 Mar 2015

Limited bright or sunny intervals with further wintry showers, heavy at times. Windy, with gales likely, especially over the summits, making it feel very cold and bringing the risk of drifting snow. Freezing level falling to around 200 metres.

Issued at: 1515 on Fri 27 Feb 2015

Tue 03 Mar 2015

Remaining very cold with gale force westerly winds, and frequent wintry showers. Snow remaining likely above 300m, although showers will gradually ease. Freezing level 300m.

Issued at: 1515 on Fri 27 Feb 2015

Wed 04 Mar 2015

Winds becoming lighter and turning milder. A few showers but mostly dry with more in the way of bright or sunny spells compared to previous days. Freezing level around the summits.

Issued at: 1515 on Fri 27 Feb 2015