HomeTutorial VideosHow To Use The Thunderstorm Composite How To Use The Thunderstorm Composite by Jack Sillin/ 10/25/2017/ No Comments/ In this video, forecaster Jack Sillin discusses how to use the Thunderstorm Composite to forecast thunderstorm activity. About the author Jack Sillin Jack Sillin is an Atmospheric Science student (Cornell '22) and weather forecaster who regularly writes for weather.us and upportland.com. Follow me on twitter @JackSillin. Related posts Forecast XL by Jack Sillin/ Weathermodels.com Individual Ensemble Member Viewer Tutorial by Jack Sillin/ Weather Overview Interface by Jack Sillin/ Lightning Analysis At Weather.us by Jack Sillin/ Comment Cancel reply Save my name, email, and website in this browser for the next time I comment. Notice: It seems you have Javascript disabled in your Browser. In order to submit a comment to this post, please write this code along with your comment: a8b945c88ea49e28895f38c89c48f303