12/08/2017 Weather for the Week Ahead


12/08/2017

Detailed weather forecast.


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Despite the disappointing weather some of us have had this week,

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at least it looks like a window of fine weather will coincide

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with the weekend.

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But thereafter, it's probably back business as usual.

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We've had some rain crossing the country through Friday.

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This is the band of cloud here.

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You can see cloud strewn out right across the Atlantic,

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so other areas of low pressure heading our way.

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So it will be just a temporary dry spell.

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As the weather systems and their drizzly rain

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clear out of the way, it allows this ridge

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of high pressure behind me to build in for the weekend.

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But it will be a slow start to our Saturday morning.

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It could be a bit grey, drizzly,

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particularly in southern areas

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with that weather front slowly exiting.

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Then it's showers following on

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the north-westerly breeze.

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North-westerly isn't a particularly

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warm direction for ourselves,

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but at least it will blow in some sunshine,

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just a scattering of showers

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and not everywhere will see one.

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The vast majority enjoying

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a lot of dry weather,

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not especially warm, 18 to 22 degrees Celsius.

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But the cloud will clear quite quickly

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through Saturday evening and overnight.

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Quite chilly for the time of year.

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We could see temperatures fall

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to 2 or 3 degrees

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across the glens of Scotland

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which is close enough to a grass force.

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As we had last weekend, actually.

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But for the majority, just a chilly night,

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It could be a bit foggy in a few places

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first thing Sunday morning.

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Again, there's still some strength

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in the August sunshine

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and there should be plenty of that

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on offer on Sunday.

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There are a few flies in the ointment.

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One or two showers in the North

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and the later in the day, rain comes

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into Northern Ireland and western fringes of England and Wales.

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That takes us into the week ahead.

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So we've got this fine spell of weather, or mostly fine,

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over the weekend, but it's back to business as usual next week.

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In fact we could have potentially stormy weather late on.

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The rain I talked about coming in late

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to Northern Ireland on Sunday.

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Moves in through Sunday night

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into Monday and it's a slow mover,

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quite heavy rain cos there's warm air in there,

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which tends to generate a lot of heavy rain.

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It looks at the moment as if perhaps

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the far north will escape the worst

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and perhaps the far south and east,

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and not a bad day here on Monday.

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The rain for many central and western areas,

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but heavy rain and it continues on

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through Monday night and into Tuesday.

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Slowly creeping eastwards and at the same time

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we may pick up some continental thunderstorms

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coming into southern and eastern areas.

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If those combine, we could have

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some very wet weather potentially as we move into Tuesday.

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But it should then move out of the way.

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A ridge of high pressure starts

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to topple in from the Atlantic,

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pushing those weather systems out of the way,

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so it freshens up and dries up

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temporarily through Tuesday night.

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So another chilly night, and into Wednesday,

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but already behind me we've got trouble brewing.

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This is the potential for some stormy weather

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around the middle part of the week.

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Now, the fly in the ointment

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is that this has got some tropical air

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mixed in with it, so it is going to prove

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a problem for the computer models

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to nail down the detail.

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But at this stage it looks like it will whisk across the Atlantic,

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turning to a fairly deep area of low pressure,

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with gales, possibly severe gale force winds.

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And a lot of rain because there's tropical air mixed in with it.

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That's how the mid part of the week looks,

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but you can see those weather systems trailing right the way

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back across the Atlantic to the USA and Canada's shores, in fact.

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And it's because we've got a strong jet stream

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pushing across the Atlantic

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and it's driving those low pressures

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eastward towards our shores.

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We're still to the north of the jet stream, still in the colder air.

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Hence the fact there's nothing very warm

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heading our way in the foreseeable future

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and hence the fact that it'll stay generally unsettled.

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But the next weekend we might be back into a brief

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ridge of high pressure, possibly dry with some sunshine.

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But the generally unsettled theme is set to continue.

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Bye-bye.

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