| When stable air crosses a mountain barrier where it tends to flow in layers forming lenticular clouds. |
| Following frontal passage when stratocumulus clouds form indicating mechanical mixing. |
| In areas of low-level temperature inversion, frontal zones, and clear air turbulence. |
MENU
EN 
IT
ES
DE
FR
PL
CZ
RS
Exam Questions
Training Quiz
Exam simulation
PDF Exam
Contact Us
Prices
Are you a school?
App Mobile