Lifted Index

The Lifted Index is a measure of atmospheric instability that is obtained by computing the temperature that the air near the ground would have if it were lifted to a higher level and comparing it to the actual temperature at that altitude. Positive values indicate more stable air and negative values indicate  instability.

The following Lifted Index value is utilized as NASP:

    -3 or less = unstable to very unstable, strong thunderstorm potential

Concept Mapping Toolkit
Insitute for Human and Machine Cognition
The University of West Florida