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yellow Warnings have been issued for the United Kingdom

West Highlands

Weather hazards over 300m on Fri 19 Sep 2014

High risk

No high risks
none

Medium risk

Persistent extensive hill fog
In the Trossachs overnight and morning, also the NW Highlands in the rain band.

Low risk

Strong sunlight
Where the sun breaks through by early afternoon, slight sunburn risk.

No risk

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

Fri 19 Sep 2014

Over the Trossachs mostly dull overcast morning with hill fog, gardually brightening. Then a good deal of bright weather to the south of the Great Glen with some sunny intervals. A band of rain and hill fog over Skye and the Northwest Highlands, will edge east and weaken though could bring a deetrioration to Lochaber later in the day. Skye and the Northwest will become brighter and clearer later with these drier conditions spreading south later in the evening.

Time
0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Light shower day Light shower day Light shower day Light shower day Cloudy Light rain
Precipitation probability
20% 30% 30% 20% 20% 30%

Visibility

Poor with mist and fog to low levels overnight and into the morning improving moderate, perhaps good in the afternoon. Locally poor in the rain band then becoming very good later in the northwest

Hill Fog

Areas to 300-600m overnight and into the morning with lower patches in east, gradually becoming more occasional and lifting 750m or above in the afternoon. Some lower patches in the rainband in the Northwest, then becoming isolated in the northwest later as cleaner air arrives.

Max wind above 600m

Variable 10-15mph.

Temperature

Valleys:
Plus 11 Celsius at dawn rising Plus 18 Celsius in the afternoon, falling Plus 12 in the evening.
800m:
Plus 10 Celsius.
Freezing level:
Above the summits.

Issued at: 0339 on Fri 19 Sep 2014

Sat 20 Sep 2014

Cloud and patchy rain, mainly in Lochaber and Trossachs, will clear during the night. This will lead to a bright day on Saturday with some sunshine at times and just a few showers coming into the north, mainly the NW Highlands and Skye.

Visibility

Moderate to poor overnight in the south becoming mainly good by the morning and then very good during the day, with much improved clarity to the air than of late.

Hill Fog

Extensive in the south overnight becoming patchy by morning with most summits in the clear during the day. Occasional summit fog in the northwest in showers.

Max wind above 600m

Northwesterly 20mph increasing 30 gusts 40mph.

Temperature

Valleys:
Falling to 9 Celsius in the south and 6 in the north by daybreak rising to 15 Celsius in the afternoon then down to 7 Celsius by midnight.
800m:
Plus 9 Celsius falling 6 Celsius. Increased wind chill compared to recent days.
Freezing level:
Above the summits.

Issued at: 0339 on Fri 19 Sep 2014

Sun 21 Sep 2014

A colder night in the glens then a dry bright day with some sunny spells. Fresh west to northwest winds on the tops but light winds at most levels.

Issued at: 0339 on Fri 19 Sep 2014

Mon 22 Sep 2014

A mainly dry day with some sunny intervals for a time. Cloud thickening to bring some hill fog then outbreaks of rain will spread to the Northwest Highlands, becoming heavy at times, and extending to remaining areas after dark. SW winds increase to gale on the tops.

Issued at: 0339 on Fri 19 Sep 2014

Tue 23 Sep 2014

Rain at firs, some heavy. Then turning brighter with some sunshine in the afternoon and occasional showers. Southwesterly gales, veering west or northwest in the afternoon.

Issued at: 0339 on Fri 19 Sep 2014