19/12/2017 Weather for the Week Ahead

Hello there, we'll take a look at the all-important weather

for the Christmas week a little later on.

There are some major changes on the way.

Before then, though, very quiet start to the week.

Got high pressure dominating across much of England and Wales.

Stronger winds towards the north-west, ahead of that

weather front there. But it's underneath the high pressure

that we've seen a lot of fog forming. In some areas,

it didn't really clear away all day on Monday.

And it's just becoming more widespread. Central, southern

and eastern England - it will have a knock-on effect on the roads

but possibly onto some of those airports as well.

Now, gradually most of that fog will tend to lift

as cloud tends to roll over the top from the west.

But some areas - East Midlands, East Anglia, the South East,

it's going to be a very slow process. Maybe some sunshine

coming through but equally the fog may linger into the afternoon,

so a cold day here. Contrast that with 14, if we get some sunshine,

along the Moray Coast and generally much milder for

Scotland, Northern Ireland, western parts of England and Wales,

where we are more likely to get some hill fog rather than

fog at lower levels. And it shouldn't be quite as dense either.

Not as foggy across these southern areas overnight.

We've got this band of rain moving southwards across Scotland

into Northern Ireland. Ahead of it, then we're going to find

temperatures four or five degrees - it turns a touch chillier in

the far north of Scotland, actually,

once that band of rain has cleared through.

And it's this weather front here, it's very weak -

it's going to get stuck eventually on Wednesday,

probably across northern England, Wales, the Midlands.

South of that, milder conditions on Wednesday, cloudy conditions.

And to the north, if we do get some sunshine in northern Scotland

it's because we're in some colder air but only briefly.

That weather front still hanging around across the UK

overnight and into Thursday. A little bit further south,

probably at this stage, or at least heading that way during the day

on Thursday. Allowing more sunshine to develop across Scotland

and Northern Ireland, possibly northern England,

even into the Midlands and North Wales.

Much milder but cloudy and damp further south across the UK.

That weather system is just going to get swallowed up by this

building area of high pressure on Thursday and into Friday,

so weakening, the rain petering out, we're left with a lot

of dry weather on Friday. Left with a lot of cloud, mind you.

This time, the best chance of seeing any sunshine

will be across more eastern areas of the UK.

For many, again light winds. Not expecting the fog problems

because there will probably be more cloud, less clear skies.

And this is how we look as we head into the weekend,

just before Christmas Day itself - high pressure sitting over

the near Continent, dominating southern parts of the UK.

Weather systems and areas of low pressure running to the

north of Scotland, threatening some rain but in between

we've go this mild west to south-westerly wind

and it will be windy. Now, as we head further into

the Christmas week, we're going to find that milder west to

south-westerly getting replaced by some colder air that's

going to come down from the north-west and that will

ultimately lead to an area of low pressure sitting to the west

of the UK. Whilst the low pressure is to the west of the UK,

we're going to draw up some winds from the south,

so that's a milder wind, more likely to bring cloud and rain.

But eventually, that area of low pressure is going to track

across the UK and as it heads towards the east of us,

so we draw down winds from the north

and this is when it really starts to get cold.

Now there is a small chance of seeing some snow perhaps over

the Scottish mountains on Christmas Day itself but

otherwise it's going to be quite windy.

It's also going to be wet. Rain to begin with

but then as the cold air arrives after Christmas day,

so we could well see some sleet and some snow.

How soon that colder air arrives, not quite sure. See you again.