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Snowdonia

Weather hazards over 300m on Fri 06 May 2016

High risk

No high risks
none

Medium risk

Strong sunlight
Risk of high UV levels at times in sunny spells.

Low risk

No low risks
none

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Gales
none
Severe chill effect
none
Persistent extensive hill fog
none
Thunderstorms
none
Heavy persistent rain
none

Fri 06 May 2016

Dry and rather chilly to start Friday with some warm sunny spells developing through the day, and although sunshine will be tempered at times by areas of high cloud, some protection is advised from occasionally high UV levels. Cloudy at times through the evening, perhaps with the odd light shower developing.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night
Precipitation probability
0% 0% 0% 0% 10% 10%

Visibility

Good.

Hill Fog

Not expected.

Max wind above 500m

East 15-20 mph

Temperature

Valleys:
Plus 5 becoming Plus 18 Celsius
800m:
Plus 8 becoming Plus 11 Celsius
Freezing level:
Well above the summits.

Sat 07 May 2016

Partly cloudy through the early hours, with odd shower. Saturday will be rather cloudy at times with scattered showers, perhaps thundery in places, but also some bright or sunny spells. It will be very warm at low levels but windy at times at most levels.

Visibility

Moderate to good, but poor in any thundery showers, and very poor in any hill fog.

Hill Fog

Isolated broken around 600m in any thundery showers.

Max wind above 500m

Southeast 25 gust 35-40 mph

Temperature

Valleys:
Plus 7 becoming Plus 20 Celsius
800m:
Plus 7 becoming Plus 12 Celsius
Freezing level:
Well above the summits.

Sun 08 May 2016

Bright or sunny intervals and scattered showers, perhaps thundery at times. Strong easterly or southeasterly winds and freezing level remaining well above the summits.

Mon 09 May 2016

Monday looks set to be similar to Sunday with some bright or sunny spells and a continuing risk of some thundery showers. Easterly winds will be noticeably strong with gusts reaching 40-45 mph. Freezing levels remaining well above the summits.

Tue 10 May 2016

Some uncertainties, but currently expected to be rather cloudy with some more general rain and hill fog possible later in the day. Strong northeasterly winds persisting, especially across the summits where gusts will continue to reach around 40 mph.

Issued at: 0336 on Fri 06 May 2016