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Not available Not available Not available Not available Not available Not available Not available Not available 0000 on Mon  9 Nov 2009 0300 on Mon  9 Nov 2009 0600 on Mon  9 Nov 2009 0900 on Mon  9 Nov 2009 1200 on Mon  9 Nov 2009 1500 on Mon  9 Nov 2009 1800 on Mon  9 Nov 2009 Night-time Mon  9 Nov 2009 Daytime Tue 10 Nov 2009 Night-time Tue 10 Nov 2009 Daytime Wed 11 Nov 2009 Night-time Wed 11 Nov 2009 Daytime Thu 12 Nov 2009 Night-time Thu 12 Nov 2009
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Updated: 1452 on Sun 8 Nov 2009
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Snowdonia: forecast temperature

Monday, 9 November 2009: dawn to dusk

Forecast issued: 1743 on Sunday, 8 November 2009

Printable view

Overview for Monday

A dry day, with some hazy sunshine likely to develop and with only light winds, after some mist, fog and low cloud around for a time in the morning.

Hazards Risk Explanation
Blizzards No Risk  
Heavy snow No Risk  
Storm force winds No Risk  
Gales No Risk  
Severe chill effect No Risk  
Persistent and extensive hill fog Low Patchy fog and low cloud forming overnight may be slow to clear.
Thunderstorms No Risk  
Heavy persistent rain No Risk  

Key to Hazards

Weather summary and probability of precipitation for Monday
Dawn to 0900 0900 to 1200 1200 to 1500 1500 to dusk
Fog
Fog
Sunny intervals
Sunny intervals
Sunny intervals
Sunny intervals
Cloudy
Cloudy
0% 0% 0% 0%

Detailed mountain weather forecast: Snowdonia

Monday

Weather

Valley mist, fog and low cloud are likely to be quite widespread at first and this is likely to be quite slow to lift, and may persist into the afternoon in places, mainly in the east of the area. A dry day generally then, with some spells of hazy sunshine in places, before more general cloud spreads over from the west later in the afternoon.

Visibility

Poor or very poor at first, with fog patches, this most likely at low levels early in the day, with the fog slowly lifting into low cloud, and breaking up to a large extent allowing visibility to improve to mostly good or very good.

Hill fog

Valley fog lifting into occasional patches around 100 to 400 metres for a time mid to late morning, and then mostly clearing by the afternoon.

Maximum winds above 500m

Southwest 20 to 25 mph by dusk in the west.

Temperature

Valleys Zero Celsius, rising to an early afternoon maximum of Plus 8 Celsius.
900 m Plus 3 Celsius.
Freezing level Above the peaks.

Tuesday

Weather

Cloudy, dull and very misty, with rain or drizzle through the morning and into the early afternoon but probably then dying out.

Visibility

Poor or very poor, becoming moderate or good during the afternoon. Hill fog.

Hill fog

Extensive above 200 to 300 metres.

Maximum winds above 500m

South or south west 30 mph, later northwest 25 mph.

Temperature

Valleys Plus 5 Celsius, rising to Plus 8 Celsius.
900 m Plus 3 Celsius.
Freezing level Above the peaks.

Outlook

Wednesday

A grey rather damp misty morning, with low cloud covering much of the higher ground. Becoming dry and brighter, with the low cloud lifting for the afternoon, but thickening cloud may later bring rain to some western parts around dusk. Light, variable winds but freshening from the southeast later.

Thursday

Sunny intervals and showers, some of which could be heavy in the south and west of the area, and then with more prolonged rain likely to spread from the southwest around dusk. Moderate to fresh south or southwest winds becoming strong to gale south to southeast later.

Friday

Perhaps a dry start but cloudy generally, with rain spreading across the whole area and becoming heavy. The rain will be accompanied by an increasing south to southwest wind which is likely to reach gale or even severe gale force later in the day, along with extensive hill fog.

North East England West Midlands Grampian South West England Central, Tayside & Fife Northern Ireland North West England East of England Highlands & Eilean Siar Strathclyde Wales East Midlands SW Scotland, Lothian Borders London & South East England Yorkshire & Humber

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