Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
I
@George-Boomer
Jet Stream map is already available. You just need to select the Wind layer and set the Altitude slider to 300hPa or 250hPa.
