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yellow Warnings have been issued for the United Kingdom

Snowdonia

Weather hazards over 300m on Fri 06 Mar 2015

High risk

Storm force winds
Gusts of 70-80mph likely through the afternoon and evening.
Gales
Gusts to gale force and above throughout. Mean wind of 40-50mph late afternoon.
Severe chill effect
Due to strength of wind, it will feel like -11 Celsius at times.

Medium risk

Persistent extensive hill fog
Patchy broken amounts at 500m at times, mainly in the west.

Low risk

No low risks
none

No risk

Blizzards
none
Heavy snow
none
Thunderstorms
none
Heavy persistent rain
none
Strong sunlight
none

Fri 06 Mar 2015

A dry, generally cloudy but windy day across the range. The winds will be strong, increasing gale or near gale through the day with gusts initially 50-60mph but increasing 70-80mph later. It will be fairly cloudy at times, particualrly in the west, with bases down to 500m. However, there will be bright and sunny spells likely too, especially in the east. In the sunny spells and out of the wind, it will feel pleasant when walking, but it will feel as cold as minus 11 in the strongests gusts in exposure.

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
Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Cloudy
Precipitation probability
0% 0% 0% 0% 0% 0% 0% 0%

Visibility

Very good, but very poor in hill fog.

Hill Fog

Broken, extensive at times, at 500m, mainly in the west.

Max wind above 500m

Southwest 30-40mph gusting 50-60mph, increasing 40-50mph gusting 70-80mph.

Temperature

Valleys:
Plus 5 Celsius increasing plus 10 Celsius.
800m:
Plus 1 Celsius.
Freezing level:
Above the summits.

Ground conditions

Latest: Date of observations: 3/4 Observation made on: Snowdon Time of observation: 12:30:00 PM Winter conditions above: 600 m Ground Conditions: Isolated stretches of snow, Streams and wet areas are frozen, Depth of snow increases with height, Snow drifts in areas, Major paths obscured making navigation difficult. Observations on: Snowdon (PyG/Miners). Observation Text: Upper section of PyG/Miners Track is verry hazardous and narrow due to snow drifts. Snow has also collected at Bwlch Glas and a cornice has begun to form. 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: 1508 on Thu 05 Mar 2015

Sat 07 Mar 2015

Another windy day which will be generally cloudy with some bright or sunny spells possible, mainly in the east. The cloud may be thick enough at times to produce the odd spot of light rain or drizzle, mainly across western slopes. Winds will again be strong with gale or severe gale force gusts and a significant wind chill, as a result.

Visibility

Generally very good, but moderate in any rain, poor in drizzle and very poor in hill fog.

Hill Fog

Broken to blanket at 400m across western slopes. Higher and more broken in the east.

Max wind above 500m

South to southwest 35-45mph gusting 70-80mph.

Temperature

Valleys:
Plus 7 Celsius increasing plus 11 Celsius.
800m:
Plus 3 Celsius.
Freezing level:
Above the summits.

Issued at: 1508 on Thu 05 Mar 2015

Sun 08 Mar 2015

Cloudy with rain, gradually weakening and clearing southwards by the middle of the day. Colder and clearer conditions will follow from the north later. Extensive hill fog at 500m at first clearing into the afternoon. Southwesterly strong to gale force winds at first, becoming northwesterly light to moderate later.

Issued at: 1508 on Thu 05 Mar 2015

Mon 09 Mar 2015

A cold and bright start, but cloud and wind will increase from the west through the morning with rain, heavy at times, arriving through the afternoon. Winds gusting gale force through the afternoon. A becoming dry and cold again overnight.

Issued at: 1508 on Thu 05 Mar 2015

Tue 10 Mar 2015

Another cold start with fairly light winds, a further band of rain will move east acrss the range through the day with increasing winds.

Issued at: 1508 on Thu 05 Mar 2015