Meteorology applicable to the departure, en route, alternate, and destination for flights conducted under Instrument Flight Rules (IFR) to include expected c...

ATP Airplane ACS › I. Preflight Preparation › C. Weather Information (ATP)

Meteorology applicable to the departure, en route, alternate, and destination for flights conducted under Instrument Flight Rules (IFR) to include expected climate and hazardous conditions such as: a. Atmospheric composition and stability b. Wind (e.g., windshear, mountain wave, factors affecting wind, etc.) c. Temperature and heat exchange d. Moisture/precipitation e. Weather system formation, including air masses and fronts f. Clouds g. Turbulence h. Thunderstorms and microbursts i. Icing and freezing level information j. Fog/mist k. Frost l. Obstructions to visibility (e.g., smoke, haze, volcanic ash, etc.)