I’ve followed Henry since his Accuweather days. He does not seem to be wedded to a single model but appears to evaluate how accurate the models are in capturing the current trend. The models vary from season to season in how well they capture the patterns. As I recall, Henry was accurate in predicting the Feb-Mar 2021 series of storms for the northern mid-Atlantic area as well as the severe weather outbreaks this past fall. I subscribed to several other paid sites in the past, and I’ll stick with Henry!