Three features that are significant for aviation are the Jet Stream in upper troposphere, Clear Air Turbulence (CAT) in upper troposphere and Icing in mid troposphere. Shown here is the Jet Stream at 200 hPa for the North American Region for next ten days. Isotachs of winds speed of more than 60 kt are marked at 200 hPa to represent Jet Stream flow at 200 hPa for better appreciation.

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