04/08/2017 Weather for the Week Ahead


04/08/2017

Detailed weather forecast.


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Low pressure is in control at the moment

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and while that remains the case,

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we are going to struggle to see much

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in the way of settled summer weather.

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It was certainly quite unsettled on Thursday.

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Southern areas were very windy,

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but at least that meant the showers

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blew through quite quickly.

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Further north, yes, the winds were lighter,

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but there were lots of showers,

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some of them heavy and thundery,

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particularly across northern

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and eastern Scotland.

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Yes, that delivered

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some impressive cloudscapes

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for our Weather Watchers here,

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but if you're on your summer holidays,

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you might well be hoping

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for a bit more blue sky than that.

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So, what about the prospects for the next few days?

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Low pressure still firmly on the scene on Friday,

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sitting up to the north-east at this stage

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so it's closest to the centre of the low

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where we'll see most of the showers,

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particularly across Scotland.

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A windier day across Scotland.

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The further south you look,

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you can see fewer showers,

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more in the way of dry weather,

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some spells of sunshine.

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The winds will be lighter

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than they were during Thursday

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and some warmth to be had,

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particularly across the south-east,

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22-23 degrees,

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cooler and fresher further north and west.

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Now, as we go into the start of the weekend,

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we are essentially stranded between high pressure,

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which is trying to muscle in from the south-west,

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and low pressure,

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which is still hanging around up to the north-east.

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That'll bring us a north-westerly wind,

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never a particularly warm wind direction.

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Quite a few showers, particularly across central areas,

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we suspect, and temperatures just 16-20 degrees.

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High pressure manages to bulge its way in

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as we go on into Sunday.

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Looks like it's trying to take control.

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It'll certainly give us a fine start to Sunday.

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Quite a cool start as well,

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but the high does not manage to hold on.

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An area of low pressure begins to journey in from the west

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so that'll increase the cloud

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and bring rain for Northern Ireland and Western Scotland

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later in the day and it is low pressure

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that is with us again

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into the start of next week.

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Frontal systems pushing across the country -

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actually, this cold front here

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could be really quite active,

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could bring a band of really heavy rain southwards

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and eastwards with the odd rumble of thunder

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and those temperatures still a little disappointing

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at 16-20 degrees.

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Now, that rain band should clear away on Tuesday.

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What does it leave behind?

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Well, you guessed it,

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a mixture of sunshine and showers,

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temperatures just 15-20 degrees.

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So, what's going on?

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If we look at the broader picture,

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the jet stream, you can see

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the way the jet dives southwards.

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In this bend in the jet stream,

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we will have an area of low pressure,

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but look further west.

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Notice the way the jet stream,

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the winds blow upwards?

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We have this ridge in the jet stream

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and it's within this ridge that high pressure

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will be sitting in place.

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Now, through the middle part of the coming week,

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it looks like this ridge of high pressure

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will build its way northwards and eastwards,

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cutting off these Atlantic weather systems,

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stopping them from working across the country.

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The big question is just how much influence

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will this high pressure have?

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There's a chance it might build northwards

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across the whole country and if it that happens,

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all of us will get into

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more settled summer weather,

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but there's also a chance

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that the high will only make it in

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across the southern half of the country,

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allowing low pressure to continue

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to affect northern areas at times,

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which will, of course, bring more cloud

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and some outbreaks of rain.

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So, to summarise that,

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for the latter part of next week,

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it does look like southern areas

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at least will turn drier,

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but there is still the chance

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of some rain in the north.

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While temperatures may climb

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a little for some,

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there's no heat wave on the way.

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That's all from me for now. Goodbye.

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