Id 454 - ATPL - On the Significant Weather Chart, we see the following indications: SCT CU 060/100The forecast charts for FL 050 and FL 100 both indicate a wind from 320°/15 kt. In flight at FL 055 over an area of plains (flat country) during the validity period of the Significant Weather Chart, we observe moderate turbulence. This turbulence is caused by
Question id 454 - Meteorology - ATPL - Airline Transport Pilot license
The instability of the air mass between the surface and the top of Cumulus clouds.
The surface radiation.
A wind shear.
System waves.
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