19/03/2018 Weather for the Week Ahead


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19/03/2018

Detailed weather forecast.


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Hello. We've had some disruptive

snowfall through the weekend.

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It has been treacherous

out and about

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and a real shock to the system.

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Significant snowfall as well,

10 to 15 centimetres in part.

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This was Llandrindod Wells

on Sunday morning.

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We had a lot of snow

in Doncaster as well.

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This picture was sent in by our

weather watcher here.

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And even in low-lying southern

areas, such as Bristol,

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we had a covering of snow and indeed

of course there were amber warnings

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across many parts in he south,

the west and Wales during Sunday.

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Now, as we get into Monday,

it's still cold to start with

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because we've still got that

Siberian easterly wind

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dominating in he south but the

winds are starting to ease

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in he north and we're starting to

see the Atlantic mild air

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get a little closer to our shores.

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So it will start cold

but largely dry this week.

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However, it will be very icy first

thing

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and then we've got the milder air

that will gradually lift

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the temperatures coming in as we go

through towards midweek.

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So Monday still has the risk of some

snow flurries in he south

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but particularly he south and West,

the Channel Islands as well.

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For many, though, it's a drier day,

brighter, not as cold.

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I won't say warm yet.

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Four or five degrees and we've still

got that wind in he south,

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so there's still a wind chill here.

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It's not so noticeable in he north

because in he north,

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we're closer to this area of high

pressure,

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which is keeping, or maintaining,

drier conditions here.

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And that slips southward, it allows

a northerly wind in for Tuesday.

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Again, a northerly wind from the

Arctic isn't a particularly warm

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wind direction at this time of year.

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However, we're cutting off that

bitter Siberian air.

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So it won't be as cold Tuesday.

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It will start icy and there could

still be a few showers

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coming into eastern areas

and one or two bits of cloud

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and drizzle into the north and west.

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But with 7 to 9,

temperatures are slowly recovering.

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There will be a snowmelt as well,

possibly rain midweek,

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so we'll have to keep an eye on

river levels.

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But by midweek we certainly are

dominated

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by this south-westerly wind across

most of the country.

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That high pressure sitting across

he south will maintain

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a lot of dry and settled weather

here.

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There could be some murkiness

around in the morning.

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But again, the rain is mostly

for the Highlands and the islands

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on Wednesday, temperatures

elsewhere are slowly recovering.

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We're seeing double figures.

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And we should see that again

through Thursday and Friday

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because you've got this wedge now of

mild Atlantic air

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from those south-westerly winds,

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our prevailing wind direction

dominating.

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But of course with the prevailing

wind, the south-westerly,

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often we have rain and low pressure.

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And that's what we have on Thursday.

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So for more of us there'll be rain,

some heavy rain,

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some stronger winds driving it

eastwards

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but again it will take much

of the day to reach eastern areas.

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But by then we might have 12 or 13

degrees.

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That's still with us across southern

and eastern areas

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through Thursday night into Friday,

clearing out of the way

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and then we've got this huge area of

low pressure

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dominating western Europe.

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So you can imagine there'll be

further areas of low pressure,

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weather fronts sent our way.

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So Friday looks fairly disturbed.

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There'll be some gusty winds near

the showery rain

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as it moves eastwards.

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It's difficult at this stage to put

the finite detail on

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but of course we'll keep you posted

through the week

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and again it's still relatively

mild, 8 to 11 is around average

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for the time of year.

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As that low slips away southwards,

we do allow a northerly wind

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to come in for a time, so it could

be an element of winteriness

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over the hills, some frost by night.

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But most of the low pressure is

then towards the second half

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of the week into the weekend and

early the following week

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are driven to the north by our jet

stream,

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that's the fast-moving air in the

upper atmosphere that drives the low

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pressures in off the Atlantic,

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driving them towards northern areas.

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So always it looks as if southern

parts will see less rain

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with high pressure around but there

will be some cooler interludes

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as we move through the weekend and

into the beginning of next week.

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Bye-bye for now.

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