Digital Map Data:
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Saturday, 19 April 2014: dawn to dusk
Printable view Forecast issued: 0439 on Saturday, 19 April 2014
Cold and clear with a frost and perhaps some patchy mist first thing. Plenty of sunshine through the day, but turning cloudier later.
|Heavy snow||No Risk|
|Storm force winds||No Risk|
|Severe chill effect||No Risk|
|Persistent and extensive hill fog||No Risk|
|Heavy persistent rain||No Risk|
|Strong Sunlight||Medium||Plenty of sunshine, especially during the morning.|
|Dawn to 0900||0900 to 1200||1200 to 1500||1500 to dusk|
A cold start with a frost and temperatures locally below freezing. Any early mist patches should quickly clear to leave a largely sunny morning with temperatures soon recovering. There may be some patchy cloud on eastern slopes however. During the afternoon it will turn cloudier but still with some good sunny spells, especially in the west. Feeling pleasant in the sunshine while walking, but chilly in the breeze.
Very good, but poor in any mist or patchy hill fog.
Well broken at around 500m at first, mainly on eastern slopes, soon dispersing and lifting above the summits.
East or southeasterly 15-20mph.
|Valleys||Plus 1 Celsius rising to plus 13 Celsius.|
|900 m||Zero rising to plus 4 Celsius.|
|Freezing level||Around 800m rising above the summits.|
A dry start, but clouding over through the early hours will hill fog developing and becoming quite extensive through the morning. There remains a large amount of uncertainty at this stage, but outbreaks of rain may spread from the southeast during the afternoon, particularly across the south of the park. Strong northeasterly winds developing with a risk of gales over the summits later.
Good, becoming moderate or poor in rain, very poor in hill fog.
Becoming broken at around 500m through the early hours then extensive during the afternoon with occasional patches above 200m.
Northeasterly 25-35mph with gusts approaching 50mph.
|Valleys||Plus 2 Celsius rising to plus 12 Celsius.|
|900 m||Plus 3 Celsius rising to plus 5 Celsius.|
|Freezing level||Above the summits.|
Some brighter spells, but overall rather cloudy with showers which may be heavy and thundery at times, perhaps merging into a longer spell of rain at times. Feeling cool in moderate to strong northeasterly winds and where rain persists. Extensive hill fog likely, particularly in any persistent rain.
Lighter winds than recent days leading to some fog patches in the valleys at first as well as over hills. Some bright spells, but there will still be heavy showers.
Some drier brighter spells initially after any early fog clears, but then another unsettled spell of weather with outbreaks of rain spreading northeastwards across the park. Perhaps drier later in the day. Temperatures around normal but breezier than Tuesday.
Latest: 07/04/2014 14:24 Yr Wyddfa/Snowdon: Some small patches of snow above 900m.
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