Snowflakes on the car window in Northbrook, Ill., Sunday, March 9, 2014. The National Weather Service has gauged this season’s chills, in part, by noting the number of days with subzero temperatures from the start of November through the end of March. (AP Photo/Nam Y. Huh)

8 facts about snowflakes

Now that western Massachusetts has seen some real winter weather, learn more about the snowflakes falling this season.