18/12/2016 Weather for the Week Ahead


18/12/2016

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It's a fairly quiet weekend of weather,

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but, next week, it looks like

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the jet stream comes back to life

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and brings weather systems across the Atlantic,

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with quite a change in our weather.

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It means later next week,

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fog is going to be on the back foot,

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as our weather turns windier, more unsettled.

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But that hasn't arrived yet

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and certainly, for Sunday morning,

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we are expecting some quite dense fog patches

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to be affecting parts of England and Wales and,

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just as it did on Saturday, there could be

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some travel disruption around,

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and some of this fog here

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could be very reluctant to clear

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and where it doesn't,

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or it just stays misty and murky,

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the temperature may only manage to be

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in mid-single figures.

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Northern England, Northern Ireland and Scotland,

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I think, many have more cloud than Saturday,

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still mainly dry,

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still a few sunny spells around

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and there will be a mild feel, I think

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especially across parts of north-east Scotland,

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Moray Firth, north Aberdeenshire.

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Temperatures could be in the mid-teens.

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As we look at the picture through Sunday night

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and into Monday morning, again, we are expecting,

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especially across parts of England and Wales,

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some fog patches to come back.

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A weather system just edging towards

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north-west Scotland late in the night,

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with a freshening breeze.

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And there isn't much frost around -

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a few spots getting into low single figures

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anywhere clear for any period of time.

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Now, this is the big picture for Monday.

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We're trying to bring in some weak weather systems

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from the north-west.

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Not having much success

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in bringing any significant rain with them

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or moving very far south-eastwards,

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so we're just being attacked a little bit

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by this one on Monday in parts of Scotland, Northern Ireland.

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We see a weaker weather system,

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just may bring in some thicker cloud

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and some outbreaks of patchy rain

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towards parts of eastern and south-east England.

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Either side, getting a bit of rain in between.

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Could be a few brighter spells for you and,

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for the most part, single-figure temperatures.

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Fairly normal for the time of year.

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Now, the weather system

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tries to edge south-eastwards

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on Monday night and into Tuesday morning,

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then edges a bit further westwards again,

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so there will be a zone of thicker cloud,

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with maybe a few spots of rain

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straddling somewhere the UK on Tuesday.

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Looks like we could bring in some drier, clearer air

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towards eastern and south-east England on Tuesday.

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Chilly, mind you, but some brighter skies.

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Then a more significant weather system

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bearing down on Scotland and Northern Ireland

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as Tuesday comes to an end.

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A more significant spell of rain

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spreading its way south-eastwards

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Tuesday night and into Wednesday morning.

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This may well weaken for a time,

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as it pushes south-east.

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Another one approaching north-western parts

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of the UK on Wednesday

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and in between, we get some brighter skies.

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More wind arrows, so the breeze

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is starting to pick up as well,

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and we see a little wave on this weather front.

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Look at the picture for England and Wales,

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Wednesday night into Thursday,

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some more substantial rain.

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Look at the isobars close together

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across the north and north-west of Britain -

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stronger winds with gales in places, too.

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However you look at it, Thursday,

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some pretty active weather.

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Potential of the northern flank of this system

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reaching northwards into colder air,

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could find a bit of sleet and snow on hills

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before it pulls away,

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then the picture for Friday

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shows another deep area of low pressure.

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Again, isobars, very strong winds,

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gales in places towards the north-west

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of Britain in particular.

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That is as the jet stream

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strengthens during next week,

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driven by a stronger thermal contrast

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across North America,

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and it's on that jet stream we find

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those more active weather systems

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coming our way.

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So that is the transition

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from a quiet start to next week,

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with some mist and fog around,

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light winds, a lot of dry weather,

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but it's from that late Tuesday onwards period

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our weather turns much more unsettled

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and we see these areas of low pressure coming in,

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and they look like they'll be around

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as well for Christmas weekend,

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but we'll keep you updated on that.

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