@dirtchamp77 @rapettij Interesting. Delta-T description: https://sprayers101.com/delta-t/ Using the Stull formula, the wetbulb temp can be calculated. https://journals.ametsoc.org/view/journals/apme/50/11/jamc-d-11-0143.1.xml I added it in the Density Altitude Plugin: www.windy.com/plugins/windy-plugin-da