12/03/2018 Weather for the Week Ahead


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12/03/2018

Detailed weather forecast.


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Hello. Mixed weather for the weekend - some sunshine, some rain -

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but the thing we probably noticed the most,

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the temperatures edging up.

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And in fact with 15.3 Celsius in London on Saturday,

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it was the warmest day of the year so far,

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but it could well be that by next weekend,

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temperatures are going in the opposite direction once again.

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As this forecast looks further ahead than the others,

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we'll get to that in just a moment.

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Now, the reason things have been turning a bit milder,

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this area of low pressure to the south-west of us

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pushing in some mild air northwards across the UK.

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But it did come with some rain and some showers,

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and it will still do that during Monday,

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as it's still close by England and Wales.

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So bands of wet weather circulating around that area of low pressure.

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A few brighter spells.

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The rain just fringing into eastern parts of Northern Ireland,

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the far south of Scotland.

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North of that, mainly cloudy, mainly dry.

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And temperatures have come down a bit compared with the weekend,

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so more of us seeing temperatures

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topping out in single figures once again.

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Now, finally, going into Tuesday,

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that area of low pressure pulls away,

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get a little bump in the isobars -

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that means a ridge of high pressure coming in for Tuesday,

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settling things down. Slow start, mind you,

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a good deal of cloud around particularly eastern parts,

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and still a bit of rain for a time, East Anglia, south-east England.

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Brightening up into the afternoon,

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more especially across western parts,

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and temperatures have edged up a little bit

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so some spots in Scotland, for example,

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getting back into double figures.

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Under clearing skies, though,

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chilly enough for a touch of frost on Tuesday night,

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then for Wednesday, our ridge of high pressure is just about gone

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as low pressure parks itself to the south-west of us

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for the rest of the week.

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It will have a limited attempt during Wednesday

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to bring in a band of wet weather towards the south-west -

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more cloud in the west. Notice the wind arrows, though -

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the most noticeable thing about Wednesday's weather

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will be a strengthening southerly wind.

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More widely, temperatures in double figures, mind you,

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but then again, the wind will be picking up.

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Our area of low pressure to the south-west of us

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will then try to feed a band of cloud and rain

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further east during Thursday. Uncertain progress.

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Here it is - may not look exactly like this by Thursday,

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but the best chance for still some sunny spells

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will be across eastern parts.

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The wind more of a south-easterly

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and it does mean something a little bit cooler coming in

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towards the North Sea coast.

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And then on Friday the low pressure is still to the west of us,

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is still trying to feed in cloud and outbreaks of rain north-eastwards

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across the UK. To the south of that, brightening up a bit,

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with a few showers, though temperatures here

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edging up towards 12 or maybe even 13 degrees.

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Now, then. Why is that area of low pressure

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parking itself to the west of us,

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not just coming right on through with its wet weather?

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Well, we'll look at the big picture, and it could well be

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that it's reaching a block in the atmosphere.

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The block will be an area of high pressure in Scandinavia.

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The flow of air around that, some colder air coming back in,

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but there's a lot of uncertainty about how cold the air will be

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as it starts to filter through during the course of next weekend.

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If comes right from the east it will be particularly chilly,

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but this latest image is less chilly

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but still colder than what we have at the moment.

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So there's still a lot to play for

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in the detail of next weekend's weather

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in just how cold it may get

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and how widely that colder air will move across the UK.

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But the indications are next weekend,

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or into the start of the following week,

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something colder coming back from the east.

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A chilly wind developing, so wind chill may be more of an issue,

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and a risk of wintry showers - not a guarantee,

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but more towards the north-east of the UK, maybe north-east England

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and into eastern Scotland, especially over higher ground.

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Still loads of play for in the detail

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so we will keep monitoring this as we go through the week.

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