Skew-T Mastery

Skew-T Mastery
Module Goal

The goal of this module is to teach the novice forecaster to effectively use the skew-T/log-P diagram. After completing the module, they should be able to read and interpret a sounding plotted on a skew-T/log P diagram and apply that information to a weather forecast.

Performance Objectives
  1. Given a skew-T/log-P diagram, identify and describe the various lines.
  2. Given a sounding plotted on a skew-T/log-P diagram:
    • Read or calculate the thermodynamic properties at various levels.
    • Determine the convective levels, including the LCL, CCL, LFC, MCL, EL, and MPL.
    • Determine stability indices such as LI, SSI, KI, TT, and SWEAT and use them to assess the potential for severe weather.
  3. Describe how CAPE and CIN are determined.
  4. List and describe the different types of stability and identify them in a sounding plotted on a skew-T diagram
  5. List and describe the different types of lapse rates and relate them to stability.
  6. List and describe processes that alter stability and give examples of common cases where those processes occur.
  7. Given a suitable synoptic environment and a sounding plotted on a skew-T/log-P diagram, interpret the sounding with regard to common forecast problems.