What type of information is included in the remarks section of METARs?

The remarks section of METARs is specifically designed to provide additional significant information that may not be included in the standard elements of the report. This section often includes details that can enhance the understanding of current weather conditions or provide context about atmospheric phenomena.

For instance, while METARs typically report data such as temperature, humidity, visibility, and wind direction in their standard format, the remarks section may contain specific observations about types of cloud layers, which can affect flight operations and weather conditions for pilots. Additionally, details about sea level pressure might also be included to indicate local pressure systems that are critical for aviation safety and forecasting.

The other options, though they contain relevant weather data, do not accurately represent what belongs specifically in the remarks section. Temperature and humidity, visibility and wind direction are standard elements of METARs, not usually categorized under remarks. Past weather events may also be recorded but are typically included as additional notes rather than in the dedicated remarks section, which focuses on current and immediate conditions.