Three people sustained head injuries on Saturday afternoon near a lake west of Bismarck, North Dakota after a severe storm dropped hailstones as large as softballs. Serious injuries due to hail are rare in recent years — so much so that it's been 14 years since the last known fatality directly caused by hail in the United States.

A strengthening low pressure system in western South Dakota is the source of a major blizzard that's expected to ramp up over the northern Plains today and tomorrow, bringing with it the potential for up to two feet of snow, wind gusts of 60 MPH, and cause temperatures to plummet into the single digits with wind chills as low as 15 degrees below zero.