Plain English Meaning
The part of a regional weather forecast that tells you what the clouds, visibility, and weather are expected to do over a large area, written mainly for pilots flying by visual reference.
Full Definition
The section of an Area Forecast (FA) that describes expected sky condition, cloud heights, visibility, and weather phenomena over a wide region for the next 12 hours, plus a 6-hour categorical outlook. Cloud heights are given as heights above mean sea level (MSL) unless noted as ceilings (CIG), in which case they are above ground level (AGL). Visibility is assumed greater than 6 statute miles and weather is assumed unless otherwise stated.