What Are Ensembles And How Do I Use Them On Weather.us? von Jack Sillin / 09/08/2017 / No Comments In this video, forecaster Jack Sillin takes you through the basics of ensembles including what they are, why they’re useful to you, and how you can make use of them over at weather.us. 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. Comment Cancel reply Save my name, email, and website in this browser for the next time I comment.