Question: how to tell if the groundhog sees his shadow
Answer: It derives from the Pennsylvania Dutch superstition that if a groundhog ( Deitsch : Grundsau , Grunddax , Dax ) emerging from its burrow on this day sees a shadow due to clear weather , it will retreat to its den and winter will persist for six more weeks , and if it does not see its shadow because of cloudiness , spring will arrive early .