2. Parameters

Temperature/Levels » Potential Temperature (Theta)Skew-T Procedure

Skew-T procedure to determine potential temperature

From the temperature curve at the given pressure, follow the dry adiabat to the 1000 hPa isobar. The isotherm value at this point is equal to the potential temperature of the air parcel. The dry adiabat is an isotherm of constant potential temperature. Thus, air with a temperature of -30°C at 500 hPa (shown) has the same potential temperature as air with a temperature of 0°C at 750 hPa or 23°C at 1000 hPa.