Components (surface level, u is positive for a west to east flow, v is positive for a south to north flow).
Available altitudes levels: 2m - 20000m (continuously)
Available pressure levels (global): 1000hPa, 950hPa, 925hPa, 900hPa, 850hPa, 800hPa, 700hPa, 500hPa, 300hPa, 250hPa, 200hPa, 150hPa, 100hPa, 70hPa, 50hPa, 10hPa
Available speed units: ms, kmh, mph, kn, bft
Chart created in MetX showing the Jet Stream on the 300 hPa level with wind barbs based on u and v wind components: