S4C

The jetstream

Had enough of the wet and unsettled weather? It's a bit too early to be certain but it looks likely that there is more settled weather ahead of us next week, with a high pressure likely to extend over the UK.

And the reason for this settled weather? Once again, it's down to the jetstream. Recently and ordinarily, the jetstream moves directly from East to West towards the UK and acts like a conveyor belt, pushing weather systems in our direction and over the country, rapidly and often, with only brief gaps inbetween.

Next week, the jetstream is likely to take a more indirect path towards us, moving first to the North and then to the south and so on, over the Atlantic. As a result, it takes longer for the weather systems to reach us and allows particular types of weather, eg. settled, to persist for longer, on arrival. The more settled weather should move to the north of the country firsof all before slowly making it's way down to the south next week.

chris tywydd