The first strong winds and gales of the autumn are heading our way this weekend and our old friend the jet stream is to blame!

Autumn is the time of year when northern latitudes begin to cool rapidly and the temperature difference over the north Atlantic begins to increase. This all adds up to a stronger jet stream!

On Sunday, the jet stream will move across the north Atlantic towards Ireland. This will lead to surface convergence of air and cyclogenesis will take place with a deepening area of low pressure forming between Iceland and Scotland.

The low pressure will bring us a spell of wet and windy weather on Sunday. Some heavy rain is likely with strong to gale force winds and the Met Office has issued a yellow warning which includes the far north of Wales.

Gusts around 45-50mph are likely on exposed coasts and headlands with gales or even severe gales on the hills and mountains with gusts over 70mph!

Here's the Snowdon summit five-day forecast, and also the one for Pen-y-Fan.

So if you’re planning a walk this weekend, my advice is to go on Saturday when the weather will be mostly dry and relatively calm! The heavy rain will clear on Sunday evening but it will remain windy on Monday and feeling chilly with a mixture of sunshine and blustery showers.

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