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Sunday, 9 March 2014: dawn to dusk
Printable view Forecast issued: 0419 on Sunday, 9 March 2014
Cloudy start with extensive hill fog and some patchy rain or drizzle. However, bases will lift and break up through the morning to reveal some sunny spells. Thicker cloud pushing in during the evening with some rain.
|Heavy snow||No Risk|
|Storm force winds||No Risk|
|Gales||Medium||Gales likely across summits overnight, but easing through the morning.|
|Severe chill effect||Low||Feeling like -3 across the summits during the morning, before winds ease.|
|Persistent and extensive hill fog||Medium||Widespread hill fog should break up through morning.|
|Heavy persistent rain||No Risk|
|Strong Sunlight||No Risk|
|Dawn to 0900||0900 to 1200||1200 to 1500||1500 to dusk|
Cloud will lower and thicken to envelop all hills with some patchy drizzle possible by morning, but the upland gales will ease. It is likely that it will remain cloudy in the west throughout the day, but across eastern hills sunny spells are likely during the afternoon. During the evening, cloud will thicken from the west with some drizzly rain by midnight.
Generally good, but poor in the drizzle and rain and very poor in the hill fog.
Extensive cloud will cover the hills at first, especially coastal hills, with bases around 500m, perhaps 300m for coastal hills. However, bases will break up and lift from the east with most hills becoming free of cloud for a time during the afternoon. Although some low cloud may continue to affect coastal hills. Through the evening bases will thicken and lower once again.
Southerly 40-50mph, easing and becoming southwesterly 25-35mph through morning.
|Valleys||Plus 6 becoming 15 Celsius.|
|900 m||Plus 8 becoming 5 Celsius.|
|Freezing level||Well above the summits.|
Low cloud will envelop the hills overnight with outbreaks of rain or drizzle, easing by dawn. The cloud will slowly lift and break up through the morning with sunny spells developing by the afternoon. Temperatures will drop sharply during the evening through the valleys with a frost likely overnight.
Generally good or very good, but very poor in the hill fog.
Extensive hill fog around 400-600m overnight, down to 200m across coastal hills. Bases will lift and break up through the morning with all hills becoming clear of cloud by the afternoon. However, some fragments may form at times across the summits.
Southwesterly 25-35mph overnight, easing and becoming light and variable through the morning.
|Valleys||Plus 5 becoming 12 Celsius.|
|900 m||Plus 5 becoming 3 Celsius.|
|Freezing level||Just above the summits.|
Another dry and fine day with length periods of sunshine, after a cold and frosty start with perhaps some patchy fog. Freezing level above the summits.
Cold start with some frost likely through the valleys and perhaps some isolated fog patches. Otherwise, another fine day with light winds and scattered cloud bases generally above the summits.
Another cold start with a frost through sheltered valleys and perhaps some fog patches. Any fog soon clearing to leave another day of sunny spells and light and variable winds.
Latest: 08/03/2014 15:24 Wyddfa / Snowdon: Old snow remains above 900m. Upper parts of paths remain treacherous in particular zig-zags below Bwlch Glas. Ice axe & crampons essential.
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