I was searching for something that explained an “inverted trough” since it was mentioned in a recent forecast discussion and I stumbled upon this website: theweatherprediction.com
It is by Jeff Haby, a meteorologist instructer who designed and ran the distance learning program at a university in Mississippi. Not only did I learn about inverted troughs, there is an amazing amount of information available at the site. One can look at “haby’s hints” parts 1-3 ( some 300 notes and growing) and get a quick read on a topic, including all parts of how to look at Skew-T. 'tons of useful info!
Jeff lives in CO now and continues to grow the website. He does have a go fund me page… If you find the info useful and want to support Jeff’s educational WX efforts consider contributing.