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UK outlook issued Thursday 14th December 2017
Changeable and milder.
Friday, Saturday: Most areas have chilly and dry weather with sunny spells but nighttime frosts. Scattered wintry showers are likely in the north and in coastal counties. Rather cold.
Sunday: After a dry start outbreaks of rain push across northern and western regions. In the south and east cloud builds and there could be some light rain during the second half of the day. Rather cold across the southern half of the UK but milder in the north.
Monday, Tuesday, Wednesday, Thursday: A good deal of dry and quite mild weather is expected in the southern half of the UK. In the north it remains more mixed with outbreaks of rain at times and closer to average temperatures.
Forecast confidence is high falling to moderate later on.
Changeable but possibly becoming colder.
Changeable weather is predicted for the first half of the week. Showers or longer spells of rain develop at times, particularly in the north where temperatures probably remain close to the seasonal average. The south could be quite mild. During the second half of the week it may turn drier and colder in the south but the north probably stays quite changeable.
Forecast confidence is low.
At the start of the forecast period the UK will be under a cold northwesterly air stream. During the first weekend milder air moves in from the west. High pressure then builds from the south but northern areas probably remain under an Atlantic flow.
Through the first half of the second week a more mobile Atlantic flow is expected for a time in all areas. During the second half of the week high pressure may become increasingly influential and bring the possibility of colder weather.
Global Forecast System (GFS) analysis
The GFS is the computer model on which we base our 16 day weather forecasts.
A milder period is expected during the first week. Later on it could turn colder again.
For a huge range of data see the chart viewer which provides output from the Arpege, Arome, CFSv2, GEM, GFS, GEFS, ECM, WW3, Arpege, Arome and Fax models and works on PCs, tablet computers such as the iPad and smartphones.
The 14 day UK weather forecast is updated twice weekly.
Use the place of postcode selector at the top of this page for the local weather forecast. The links below are to discussion and long range outlooks.
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