Digital Map Data:
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Friday, 18 April 2014: dawn to dusk
Printable view Forecast issued: 0423 on Friday, 18 April 2014
A cold start, followed by a dry day with long, warm sunny spells.
|Heavy snow||No Risk|
|Storm force winds||No Risk|
|Severe chill effect||No Risk|
|Persistent and extensive hill fog||Low||Some patchy cloud at 500m, burning off through the morning.|
|Heavy persistent rain||No Risk|
|Strong Sunlight||Medium||Long sunny spells throughout the day.|
|Dawn to 0900||0900 to 1200||1200 to 1500||1500 to dusk|
A cold start with frost and some patchy valley mist. It will then be a dry day with long spells of warm sunshine and light winds. Some patchy low cloud for a time through the morning, clearing by lunch time. It will feel pleasantly warm when walking.
Excellent or very good, very poor in any hill fog.
Patchy cloud from 500m at first. Lifting and clearing through the morning.
Northerly 15-20mph at first.
|Valleys||Plus 2 Celsius becoming plus 13 Celsius.|
|900 m||Plus 0 Celsius becoming plus 4 Celsius.|
|Freezing level||900m soon rising above summits.|
A cold start after clear skies overnight. Another dry day with plenty of warm sunshine throughout, through becoming slightly hazy later. Winds remaining mainly light and easterly resulting in some patchy cloud at first. Conditions will be pleasantly warm while walking and care should be taken in the sunshine.
Excellent, reducing moderate to good in haze later. Very poor in any hill fog.
Patchy cloud at 500m at first, soon clearing.
Easterly 15mph, gusting 25mph at times.
|Valleys||Plus 1 Celsius becoming plus 14 Celsius.|
|900 m||Plus 4 Celsius.|
|Freezing level||Above summits.|
A fine a dry start with cloud soon increasing, bringing hill fog and rain through the afternoon. Winds also strengthening from the northeast. It will be noticeably colder that previous days. Freezing level close to the summits at first.
A dull, cloudy day with rain at times throughout. There will be some brighter spells at times too, but hill fog will be extensive above 500m. Winds remaining fresh to strong from the northeast, making walking difficult at times and also keeping temperatures down. Care should be taken.
Drier and less windy than on Monday. Still a generally cloudy day with extensive hill fog for the highest peaks and spells of rain or drizzle throughout the day. However, there may be a few more brighter spells.
Latest: 07/04/2014 14:24 Yr Wyddfa/Snowdon: Some small patches of snow above 900m.
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