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West Highlands

Weather hazards over 300m on Fri 28 Apr 2017

High risk

No high risks
none

Medium risk

No medium risks
none

Low risk

Persistent extensive hill fog
Hill fog persistent at times, mainly in the afternoon on highest areas.
Strong sunlight
Sunny spells giving a risk of sunburn.

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Gales
none
Severe chill effect
none
Thunderstorms
none
Heavy persistent rain
none

Fri 28 Apr 2017

A bright start with a touch of frost in central and eastern glens, but cloudier further west with a few coastal showers. Cloud increasing during the morning, perhaps bringing a few light showers elsewhere by the afternoon, these falling as rain on lower slopes, but as sleet or snow above about 900m. A few showers lasting into the evening before dying out leaving a dry night with clear spells.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Clear night
Precipitation probability
10% 20% 30% 30% 20% 10%

Visibility

Very good beneath the cloud, but falling to moderate or poor in any showers.

Hill Fog

Patches above around 700m in the morning, bases rising to around 900m in the afternoon but cloud becoming more extensive.

Max wind above 600m

Northerly 20mph at first, becoming light for much of the day, then increasing in the evening to southwest 20mph, 35mph over Skye.

Temperature

Valleys:
Zero Celsius at first, rising to plus 11 Celsius in the afternoon.
800m:
Around plus 1 Celsius.
Freezing level:
Around 1000m.

Sat 29 Apr 2017

Mainly dry and bright to start, with some sunny spells. Cloud tending to develop and build through the morning, with some patchy drizzly rain (sleet/wet snow on Munros) developing by the afternoon. This looks likely to be most persistent across hills exposed to the south, like the Trossachs, Arrochar Alps and Crianlarich hills. The best of any drier and brighter conditions will be across the northern and northwestern Highlands.

Visibility

Generally good beneath the cloud base, and outwith any showery rain. Occasionally poor in drizzly rain or sleet across southern ranges.

Hill Fog

Some hill fog above 600m at first. Cloud amounts increasing through the day but bases generally lifting through the morning, giving persistent hill fog above around 800m across southern ranges, but patchy across northern ranges.

Max wind above 600m

Southerly 25mph, increasing in the afternoon to southeasterly 35mph with gusts to 50-60mph.

Temperature

Valleys:
Zero Celsius at first, rising to plus 12 Celsius.
800m:
Around plus 2 Celsius.
Freezing level:
Around 1200m.

Sun 30 Apr 2017

Strong or gale force southeasterly winds look likely to develop; this means that the western and northwestern Highlands will generally see dry and fine weather, with some warm sunshine. The freezing level will be around the highest tops. Cloudier at times over southern and eastern parts.

Mon 01 May 2017

Similar to Sunday with the best of the dry and bright weather in the northwest. Strong southeasterly winds. Freezing level lifting above the summits.

Tue 02 May 2017

Predominantly dry, and turning gradually milder, warm in any sunshine in the north. Some good sunny spells, especially over northern ranges. Generally cloudier in the south and east. Winds a moderate southerly.

Issued at: 0241 on Fri 28 Apr 2017