Plain English Meaning
Maps that show what the weather is doing, or is expected to do, over a region. Different charts show different things — pressure systems, fronts, precipitation, clouds, or forecast hazards.
Full Definition
Printed or digital maps that display observed or forecast weather information across a geographic area, used by pilots for preflight planning and inflight decision-making. Common examples include surface analysis charts, weather depiction charts, radar summary charts, and significant weather prognostic charts, each showing different elements such as fronts, pressure systems, precipitation, cloud cover, or .