Thundersnow: a dangerously seductive term derived by meteorologists thats sexy, instills a bit of fear, and replaced the previous term "heavy accumulation" with creative wordplay found in live action children's television series such as Power Rangers.
The meteorologist needed a new angle to portray the storm in a more serious light, something that flowed off the tongue, and there, Thundersnow was born.
The rare winter act where a severe snow storm becomes a "thundersnow." This involved a sever storm with thunder, lightning, rain and snow. It likely happens during a blizzard warning. Think apocalyptic. It is kinda like you are in a movie.
During the thundersnow, there are wind gusts up to 60 MPH and in Feb 2011 in Chicago they had 25 ft waves on Lake Michigan!