Consumer Reports, January 18, 2016, evaluates two all weather tires, the Toyo Celsius and Nokian WR G3:

Too many people are missing the point of all-weather tires. The question is not whether they offer superior winter performance than dedicated winter tires (they don’t) but whether they are significantly better than summer/all-season tires (they are). Dedicated three-season and winter tires would offer the best…