17/05/2017 Weather for the Week Ahead


17/05/2017

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Hello, sometimes when high pressure is in charge of our weather,

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I have to be honest with you, there is not a lot to talk about.

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Right now, it's hard to fit it all in.

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On Monday, we talked about the rain,

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for Tuesday it was the warmth for some, from

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East Anglia, south-east England, and into north-east Scotland,

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and in fact it was the UK's warmest day of the year so far,

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with 26 Celsius at Gravesend in Kent.

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But that 22 at Lossiemouth in Moray,

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was Scotland's highest temperature of the year so far.

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So, some warmth and some sunshine.

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Clearly, not everybody had that, though,

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here is some cloud that did produce some outbreaks of rain.

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There's a lot to talk about because we have swapped high pressure

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for low pressure, here it is to the west of us.

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Now, you think, hold on,

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low pressure and yet there has been some warmth around.

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Surely that would come with high pressure at the height of summer?

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Well, as ever with the UK's weather, low pressure or high pressure,

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it is about where the air is coming from around these pressure systems.

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And what we have at the moment, around low pressure in the Atlantic,

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is warm air being drawn back from a long way south of the UK and

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lifting those temperatures where the sun makes an appearance,

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boosting the humidity too.

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But as we go through the week, low pressure still to the west

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of us changes position slightly and we start to filter in this

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cooler air, not from the south but from the north-west.

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So, it will feel much fresher, not cold by any stretch of

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the imagination, but it will feel quite different out there.

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And before we get to that, there's something else to talk about

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during Wednesday, and that is all this rain covering

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a large swathe of England and Wales, leading to for some a very wet day.

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For Scotland, and for Northern Ireland,

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some pleasant sunny spells and scattered showers.

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It will feel quite warm in the sunshine, cool in the rain,

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and still very warm and humid, with that air from the south,

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into East Anglia and south-east England.

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But here the rain will get in late in the day and there's a chance

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of seeing some torrential thunder bursts before it clears away.

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Now, there will be some in southern, central and eastern England

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that will end up with around 20 to 40mm of rain.

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After it's been so dry, very useful for gardeners,

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not so good for travelling through, but it's gone for Thursday,

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sunshine and scattered showers across the board,

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and remember that very warm and humid air, well, that's

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now cleared out of the way, it's feeling cooler and fresher,

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but still pleasant when the sun makes an appearance, cooler when the

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showers move through, but catch one and it could be heavy and thundery.

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Now, if anything, on Friday,

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low pressure is certainly in control, you can see the

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swirl of wind around it, just to the west of the UK.

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But with low pressure in control,

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those showers become more widespread on Friday,

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and look like featuring on our weather all the way through the

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weekend into the start of next week as well.

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So a quick look at Saturday,

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it's difficult at this stage to pinpoint exactly where the

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heavy showers will be, where the most frequent showers will be,

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but just cater for sunshine and showers Saturday and Sunday

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and also, although it's cooler and fresher by day,

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the nights have turned cooler too.

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And some spots may end up close to freezing

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in any prolonged clear spells overnight.

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It is much less humid, now that warm air is out of the way.

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Now into the start of next week, low pressure, as we've seen,

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is around but it looks like it may just exit the scene for

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a time, allowing high pressure to build in, but it looks like

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that will just be briefly, because the best advice at the moment is

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that low pressure will come back and turn things unsettled once more.

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So, it's a bit up and down next week,

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a showery start, possibly dry and more settled for a time,

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but not for long, before low pressure comes back on the scene.

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And of course, it will be low pressure coming back on

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the scene, and that means,

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at least for me, there will be lots to talk about.

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And that's your latest Weather For The Week Ahead.

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