Think of a Jet stream as a fast-moving river of air. It is generally defined by wind speeds of 50 knots or greater with the strongest wind contained in the core of the jet stream. They form along boundaries between hot and cold air. Since these hot and cold air boundaries are most pronounced in winter, jet streams are the strongest and farther south during the winter. That also means jet streams are weaker and farther north in the summertime. Troughs will most likely have clear air turbulence as

The jet stream, a fast moving ribbon of air, has a significant influence on our weather. The position of the jet stream this week will drive a move away from low pressure to bring high once again over the UK. This will in turn bring more settled weather for most of us. Here are the details… | Met Office

14K views · 211 reactions | A strong #jetstream will feed eastwards across the North Atlantic this week. This should speed up the arrival time of trans-Atlantic flights to UK airports. For our weather, high pressure will persist towards the south of the UK, but a strong jet stream will feed low pressure towards the north west. | Met Office | Facebook

16K views · 230 reactions | The #jetstream will move southwards across the UK this week, bringing some wet and windy weather for a time, and also colder conditions | Met Office | Facebook