1. Skew-T Description

Lines on the skew-T Isotherms

Isotherms on a skew-T

Isotherms are lines of constant temperature.  On the skew-T diagram, isotherms are straight, solid lines, sloping from the lower left to upper right.  In this example, the isotherm interval is 10°C and those from -40°C to +40°C are labeled at the bottom of the chart.