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yellow Warnings have been issued for the United Kingdom

Snowdonia

Weather hazards over 300m on Sat 22 Nov 2014

High risk

Persistent extensive hill fog
Extensive above 400m through the morning, lifting and breaking through the afternoon.

Medium risk

No medium risks
none

Low risk

Severe chill effect
In rain and strong winds over highest peaks.

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Gales
none
Thunderstorms
none
Heavy persistent rain
none
Strong sunlight
none

Sat 22 Nov 2014

Cloudy with extensive hill fog and outbreaks of rain at first. The rain will gradually clear to the northeast through the morning and the cloud will lift. It will become dry into the afternoon with some bright or sunny spells possible. Some strong winds at first over the highest peaks, but easing through the day.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Light shower day Light shower day Sunny intervals Light shower day Light shower day Partly cloudy night
Precipitation probability
20% 20% 20% 40% 40% 70%

Visibility

Becoming good or very good, but moderate in rain, poor in heavy rain/drizzle and very poor in hill fog.

Hill Fog

Extensive above 400m, but lifting a breaking into the afternoon.

Max wind above 500m

South to southwesterly 25-30mph, easing to 15mph into the afternoon.

Temperature

Valleys:
Plus 9 Celsius becoming plus 14 Celsius.
800m:
Plus 6 Celsius becoming plus 2 Celsius.
Freezing level:
Above the summits.

Ground conditions

Latest: Date of observations: 11/21 Observation made on: Snowdon Time of observation: 10:30:00 Winter conditions above: N/A Ground Conditions: No current reports. Observations on: N/A Observation Text: Nil. Kit Advice: N/A

Issued at: 0338 on Sat 22 Nov 2014

Sun 23 Nov 2014

Some patchy rain possible at first to the southeast but quickly clearing to the south. It will then be a mainly dry day with bright or sunny spells. Winds generally light and temperatures around normal for the time of year.

Visibility

Excellent, moderate in any early rain, very poor in any hill fog.

Hill Fog

Isolated patches above 500m through the day.

Max wind above 500m

Westerly 10-20mph.

Temperature

Valleys:
Plus 6 Celsius becoming plus 12 Celsius.
800m:
Plus 3 Celsius.
Freezing level:
Above the summits.

Issued at: 0338 on Sat 22 Nov 2014

Mon 24 Nov 2014

A chilly start with some valley frost and fog likely. It will then be a dry and bright day with some sunny spells likely too. The winds will remain light throughout with cloud generally remaining above the summits.

Issued at: 0338 on Sat 22 Nov 2014

Tue 25 Nov 2014

Another dry and chilly start, but cloud will quickly increase from the southeast as rain and low cloud/hill fog spreads in through the afternoon. Winds will also gradually increase from the west.

Issued at: 0338 on Sat 22 Nov 2014

Wed 26 Nov 2014

Cloudy with outbreaks of rain, possibly heavy at times, throughout the day. Cloud will be low enough to produce extensive hill fog above 400m, possibly lower at times. Poor conditions for walking and feeling cold in exposure.

Issued at: 0338 on Sat 22 Nov 2014