This page displays the current location of the Atlantic jet stream and also the forecast position and intensity over the next seven days.
The jet stream is identified as winds at 300mb (during Winter) and 200mb (during Summer). It is these winds which are responsible for driving and developing weather systems across the Atlantic.
You can use the maps below to see not just how intense the jet stream is, but also whether the weather systems underneath them are likely to intensify or not.
The chart above shows the wind direction and speed at 200mb across the Atlantic. The jet stream can be identified as the yellow/orange/red stream of winds.
The faster the jet, the more intense the red colouring.