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Lake District

Weather hazards over 300m on Mon 27 Apr 2015

High risk

Gales
Gale force gusts through the late afternoon and evening, reaching 55mph at times.

Medium risk

Severe chill effect
Strong winds coupled with snow and sub-zero temperatures will cause additional chill.

Low risk

Blizzards
Gale force winds and snow on fells tops could result in blizzard conditions.
Persistent extensive hill fog
Hill fog, snow and strong winds will lead to some difficult conditions of the fells.
Thunderstorms
Low risk of thunderstorms, most likely in heavier outbreaks in the evening.
Strong sunlight
Low risk of exposure to UV in any clear breaks in the afternoon.

No risk

Heavy snow
none
Storm force winds
none
Heavy persistent rain
none

Mon 27 Apr 2015

Largely dry through the morning and early afternoon. Just an isolated odd shower, with snow above 600m. Some more prolonged showers later in the afternoon and early evening with snow falling down to 300m and perhaps some heavy snow and drifting on the fell tops and ridges as winds strengthen.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Sunny day Sunny intervals Light snow shower day Light snow shower day Heavy snow shower day Heavy snow shower night
Precipitation probability
0% 20% 50-70% 50-70% 70-90% 30-50%

Visibility

Mainly good or very good at first becoming moderate to poor in showers and very poor, possibly only 50m or less, in more prolonged snow showers in the afternoon and early evening.

Hill Fog

Occasional hill fog above 750m with patches to 500m in heavier showers over western fells, especially in the afternoon and evening, otherwise the fells will be fog free.

Max wind above 500m

North or northwesterly winds of 20mph, with gusts of 30mph. Turning southwesterly by afternoon 20-30mph, with frequent gusts of 40-45mph, and 50-55mph over the highest peaks and ridges.

Temperature

Valleys:
0 Celsius at dawn then rising to plus 8 Celsius at best in the afternoon. Falling to plus 4 Celsius in more prolonged showers and down to plus 2 Celsius in the evening.
800m:
Minus 4 Celsius.
Freezing level:
500m, perhaps 300m in more prolonged snow showers later.

Ground conditions

Issued at: 0026 on Mon 27 Apr 2015

Tue 28 Apr 2015

Scattered showers persist through the morning, falling as snow over 300m. Another cold late spring day with some brief sunny intervals in the afternoon in between showers. A widespread band of rain and snow pushes in from the west through the late evening. High wind chill due to strong to gale force west to southwesterly winds on the hills.

Visibility

Moderate to good visibility, but rain showers will decrease to poor and snow showers reducing visibility even further. This coupled with hill fog, especially in the evening could reduce visibilities to 50m or less at times resulting extreme navigational difficulties.

Hill Fog

Widespread hill fog to around 500m in the morning, with occasional patches down to 200m especially on windward slopes. Fog will lift by midday in most places but forming again at 500m in association with the rain and snow later.

Max wind above 500m

Generally westerly winds 20-30mph. Additionally gusts of 50-60mph through the first half of the day but easing somewhat to 30-40mph in the evening.

Temperature

Valleys:
Around plus 3 Celsius in the morning, rising to a maximum of plus 7 Celsius and falling to around plus 4 Celsius by night.
800m:
Around minus 3 Celsius.
Freezing level:
Freezing levels around 500m, gradually rising to around 750m by midnight

Issued at: 0026 on Mon 27 Apr 2015

Wed 29 Apr 2015

A wet and cold start followed by a cloudy day with outbreaks of rain, and still cold enough for snow on the high fells, with freezing levels close to the 800m mark. Turning dry towards the end of the evening. Strong south to southwest winds, summit blizzards possible.

Issued at: 0026 on Mon 27 Apr 2015

Thu 30 Apr 2015

A brighter day with sunshine and scattered showers, these of snow above 700m. Fresh north to northwesterly winds, strong on tops, but visibility away from showers will be very good and hill fog will be isolated.

Issued at: 0026 on Mon 27 Apr 2015

Fri 01 May 2015

Similar weather on Friday, with further sunny and clear spells with scattered showers. Freezing level remaining around 700-800m.

Issued at: 0026 on Mon 27 Apr 2015