A calculated value which represents the amount of Equivalent Potential Energy (Temperature) in a ‘parcel’ of air. Higher Theta-E indicates higher instability and higher thermal energy.
Theta-E is measured in º Kelvin.
Theta-E plots are useful in weather forecasting. Moisture often moves along contours of equal Theta-E, especially in winter. A tight gradient in Theta-E contours often shows the position of fronts.« Back to Glossary Index