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Yorkshire Dales

Confidence

High for timings of rain clearance this afternoon. Low for aspects of the weather on Sunday and Monday, due to uncertainty in slow-moving weather fronts.

  • Thursday
  • Friday
  • Further outlook

Thursday 21 September 2017

Weather hazards

Poor visibility High likelihood Hide detail

Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.

Heavy persistent rain Low likelihood Show detail

Prolonged exposure to heavy rain can result in drenched clothing and a risk of hypothermia if not wearing good quality waterproofs. Terrain may turn increasingly boggy underfoot, while mountain streams will rapidly rise into spate and may become impassable. There may also be a risk of flooding in valleys or glens. If there is snow cover, a heightened avalanche hazard is possible and avalanche reports should be consulted where available.

Forecast

Mainly dry first thing, but, occasionally heavy rain soon arriving, clearing late in the day.

Weather at 600m

06:00 09:00 12:00 15:00 18:00 21:00
Heavy rain Heavy rain Heavy rain Cloudy Sunny day Clear night
60% 80% 90% 30% 20% 00%
Chance of precipitation
2,700 2,600 2,400 2,000 1,600 1,400
Freezing level (m)
The level above which snow is expected to settle or the ground is expected to be frozen

Wind speed and direction (mph) By altitude above mean sea level

06:00 09:00 12:00 15:00 18:00 21:00
600m S 21 28 S 22 30 SW 17 25 W 14 20 W 13 19 W 10 16
300m S 14 30 S 14 29 SW 11 23 W 10 21 W 8 18 W 6 13
Valley S 10 28 S 10 27 SW 8 19 W 8 18 W 6 15 W 3 8

Temperature (°C) By altitude above mean sea level

06:00 09:00 12:00 15:00 18:00 21:00
600m 11 11 10 10 8 7
300m 12 13 12 12 10 9
Valley 14 14 13 13 12 9

Feels like temperature (°C) By altitude above mean sea level

06:00 09:00 12:00 15:00 18:00 21:00
600m 8 7 7 7 5 4
300m 10 10 10 10 9 7
Valley 12 12 12 12 11 9
Sunrise: 06:52   Sunset: 19:11
Moon phase: New

Weather

Occasionally heavy rain will move in from the west during the morning, combined with low cloud shrouding highest peaks. The rain will persist for most of the morning before starting to clear eastwards during the afternoon. Gusty southerly winds during the morning will ease to a lighter westerly by the afternoon. Dry and bright weather is likely to end the day, perhaps with some late sunshine before dusk. Remaining dry and becoming cold during the evening under clear skies.

Chance of cloud-free mountain/hill tops at 600m

30% at first, with patches of cloud down to 400 metres across some parts. Quickly increasing to 90% later in the afternoon as the weather front clears.

Visibility

Poor or very poor in any heavier rain and low cloud. Visibilities improving significantly during the afternoon with fresher, clearer air from the west arriving behind the weather front.

Meteorologist's view

Strong winds across high ridges in the southerly, but easing quickly as the westerly sets in during the afternoon, and feeling much cooler with the westerly.

Recent rainfall

  • Location: Malham
  • Altitude: 375m
  • Measurement date: 03:00 on Thu 21 Sep 2017
  • Last 24 hours: 1.8mm
  • Last 48 hours: 1.8mm
  • Last 72 hours: 3.4mm

Rainfall data provided by the Environment Agency. The Met Office is not responsible for content provided by third parties and may remove this data without warning.

Friday 22 September 2017

Sunrise: 06:54   Sunset: 19:09
Moon phase: New

Weather

A dry, cold and sunny start, and remaining dry and sunny until the afternoon with any valley fog clearing quickly. Becoming increasingly cloudy during the afternoon, with a little rain pushing eastwards. Southwesterly winds strengthening through the day. Cloud may lower onto high ridges during the late afternoon, more especially during the evening.

Temperature

  • At 600m Plus 12 Celsius.
  • Valley Plus 5 rising to plus 17 Celsius.
  • Freezing level Above the summits.

Visibility

Excellent during most of the day, but deteriorating a little as the rain arrives during the afternoon. Cloud should stay mostly above the high peaks until late afternoon, so reducing to poor visibilities by the end of the day.

Chance of cloud-free mountain/hill tops at 600m

100% during the morning, but falling to 60% during the afternoon, then 20% late afternoon and evening.

Maximum wind speed expected

Southerly 40mph.

Saturday 23 September 2017

Sunrise: 06:56   Sunset: 19:06
Moon phase: New

A mostly cloudy morning, with cloud covering highest peaks, and perhaps a little drizzle. A strong southerly wind should develop, which will help the cloud disperse and some warm sunshine to develop later in the day.

Sunday 24 September 2017

Sunrise: 06:57   Sunset: 19:04
Moon phase: New

Most likely dry and bright with sunshine during the morning, and relatively warm with moderate southeasterly winds. Rain is likely to edge into the west again during the afternoon, but timing of this is uncertain at this point.

Monday 25 September 2017

Sunrise: 06:59   Sunset: 19:01
Moon phase: Waxing crescent

A weather front looks likely to be nearby or overhead on Monday, but with some uncertainty at this stage. The most likely scenario is for a rather cloudy day, perhaps with hill fog and mainly light winds, and a few showery outbreaks of rain at times.

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