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Yorkshire Dales mountain area forecast

Forecast issued: 0408 on Friday, 19 September 2014

Overview for Friday

Extensive hill fog and patchy drizzle at first gradually lifting and breaking from mid-morning onwards. Generally dry for the latter part of the day.

Hazards

High risk of Persistent extensive hill fog: Extensive above 200m to mid-morning, then gradually lifting and breaking.

Low risk of Strong sunlight: Sunny spells developing by afternoon with a risk of sunburn in prolonged exposure.

No risk of Blizzards; Heavy snow; Storm force winds; Gales; Severe chill effect; Thunderstorms; Heavy persistent rain;

Weather summary and probability of precipitation for Friday

Dawn to 0900 Cloudy Cloudy 30% chance of precipitation
0900 to 1200 Cloudy Cloudy 0% chance of precipitation
1200 to 1500 Sunny intervals Sunny intervals 0% chance of precipitation
1500 to dusk Sunny intervals Sunny intervals 0% chance of precipitation

Detailed mountain weather forecast

Friday

Weather

Overcast with extensive hill fog and some drizzle. For western areas, the low cloud will thin and lift with some hazy sunny spells possible. Further east, though, although brightening up, it is likely to stay rather cloudy. Cloud will thicken up again during the evening, lowering onto hills again, especially in the east.

Visibility

Poor or very poor in mist and hill fog, becoming moderate or good this afternoon.

Hill fog

Broken to overcast above 200 to 300m in the early hours and at first during the day, lifting through the morning then mostly above the hills by evening.

Maximum winds above 400m

Easterly or Northeasterly 15 to 20 mph at first.

Temperature

Valleys: Plus 11 becoming plus 19 Celsius.
700 m: Plus 14 Celsius.
Freezing level: Well above the peaks.

Saturday

Weather

Another cloudy, misty start with quite extensive hill fog. Through the morning, the cloud will slowly thin and lift, especially in western areas, with some sunny spells possible for a time. However, later in the day, cloud is expected to thicken up again bringing outbreaks of rain, this perhaps heavy for a time in the evening. Feeling fresher than of late, with temperatures falling over the peaks.

Visibility

Poor or very poor in mist and hill fog, becoming moderate to poor in rain. Improving later to good, perhaps very good by evening.

Hill fog

Broken bases 300 to 400 meters at first and in any persistent rain. Improving gradually through the afternoon, but patches above 600 metres, then more broken above 400 metres in the evening.

Maximum winds above 400m

Easterly or Northeasterly 20-25mph over the peaks at first.

Temperature

Valleys: Plus 11 becoming plus 19 Celsius.
700 m: Plus 14 Celsius falling to 08 Celsius by evening.
Freezing level: Well above the peaks.

Outlook

Sunday

A dry day with much improved visibility and cloud bases compared to recent days. A much fresher feel, too, especially first thing. Winds will be light.

Monday

Another dry day with light winds and lengthy clear or sunny spells. Again, it will be chilly early on and late in the day, but will feel pleasantly warm by afternoon in any sunshine.

Tuesday

The theme of dry weather should last through most of Tuesday, although there is a chance of some thicker cloud, freshening winds and outbreaks of rain edging in from the northwest.


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