upper-level chart

A synoptic chart of meteorological conditions in the upper air, almost invariably referring to a standard constant-pressure chart. Also known as upper-air chart.

Related terms:

• upper-level cyclone
• freezing-level chart
• upper-level trough
• upper-level ridge
• upper-level anticyclone
• fixed-level chart
• constant-level chart
• upper-air chart
• upper-level disturbance
• isentropic chart