13/12/2017 Weather for the Week Ahead


13/12/2017

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Hello. I'm sure you know the score by now.

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We do the detail for this week then look at the trends

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that may affect the British Isles in the forthcoming week.

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But first of all to the here and now, almost.

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Watch out for the dry start,

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because it could be an icy start across central, northern

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and eastern parts of the British Isles, having had overnight rain.

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And then don't be fooled by the dry start,

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because here comes the first belt of weather for the day,

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moving from west to east on what is going to be a milder day

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across the southern parts of the British Isles.

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Further north, still on the cool side,

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and into that cool air we push more moisture.

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And look, significant snowfall just in time for the evening rush hour

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quite widely across northern parts of the British Isles.

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Here we are on Thursday. We've got a belt of weather

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just gradually tracking its way ever further towards the east.

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Behind it, a lot of isobars there.

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It'll be a windy old do, especially in the southern

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half of Britain as we get on through Thursday,

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yet again urging copious showers,

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some of these wintry in nature, across England and Wales.

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Look at this, close by to Glasgow and Edinburgh, throughout

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the day we could have a period of continuous snow, something to watch.

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We'll update you on that, of course,

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as we move through the next 24 hours or so.

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As I say, Thursday a windy day,

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but with the wind in the west and south-west.

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But look, out of Thursday into Friday,

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we get these isobars running

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- and we've done this to you before - north to south.

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So, cold air streaming down these isobars.

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The shower distribution around the shoulders of the British Isles,

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down the spine a lot of sunshine, a lot of dry weather,

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not a lot of heat.

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But that is a short, sharp shock, because through the day on Saturday,

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we're just beginning to crank the isobars back to a north-westerly,

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and at the same time we'll just see the first signs,

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as we get on through the weekend, of milder air trying to displace

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that pool of cold air off towards the near Continent.

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That is a very slow process.

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Do not expect to see this transformation in the eastern

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parts of the British Isles

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until perhaps into the start of the forthcoming week.

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Here we are on Saturday, a cold and frosty start, a north-westerly

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breeze urging the showers into some of these northern and western parts.

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Out east, the very best of the sunshine,

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but you've probably got the strongest of the breezes.

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And it won't feel particularly warm. Remember what I said,

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it's going to take a while before all the mild air ahead of this

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next Atlantic front really makes it right across the British Isles.

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That weather front robs northern and western parts of their sunshine

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as we get on into Sunday,

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but we do see the first signs of that upping of the temperatures

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across these western areas - eight, nine, ten or eleven.

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And we complete the process as we get on into Monday.

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The disturbed weather locked across northern parts of the British Isles,

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further south, drier, finer conditions break out, and

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they're coupled with temperatures

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that are on eight, nine, ten or eleven degrees.

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Further ahead, we rather stick in that pattern.

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Having established, I would have thought,

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the first part of the forthcoming week we'd see the wet

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and windy fare confined to northern

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and north-western parts of the British Isles

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- it could be really quite windy at times, as well - further south,

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there's a chance of something a little bit drier,

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a little bit finer and nowhere near as cold as we've seen it.

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Temperatures, I think, will be for the most part higher than

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we would have expected for this time of year.

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It will, however, especially in the north, be often windy.

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That pattern really opens the door to very changeable conditions.

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