HomeTutorial VideosHow To Use The Synoptic Composite How To Use The Synoptic Composite by Jack Sillin/ 10/25/2017/ No Comments/ In this video, forecaster Jack Sillin explains how to use our newly added Synoptic Composite to forecast the behavior of storms. About the author Jack Sillin Jack Sillin is a weather nerd and forecaster who regularly writes for weather.us, 33andrain.com, and upportland.com. Follow me on twitter @JackSillin. Related posts Satellite Imagery At Weather.us by Jack Sillin/ Lightning Analysis At Weather.us by Jack Sillin/ What Are Ensembles And How Do I Use Them On Weather.us? by Jack Sillin/ Seasonal Forecasts at Weather.us by Jack Sillin/ Comment Cancel reply 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: fc7e39f7fc6b1c481869516c338f0cda