Plain English Meaning

A forecast that tells you which way the wind will be blowing, how strong it will be, and how cold or warm the air will be at different heights above the ground for a given time window.

Full Definition

A weather product that predicts wind direction, wind speed, and air temperature at specific altitudes for selected reporting locations and valid time periods. It is issued for use in flight planning to estimate groundspeed, fuel burn, drift correction, and the likelihood of icing or turbulence at altitudes.