have a positive polarity, which is associated with a greater destructive potential than the more common negatively-charged lightning. That said, lightning is far less frequent in a thundersnow storm than in a summertime storm, and is usually of the cloud-to-cloud variety, rather than a strike that travels to the ground. See also Blizzard warning Severe thunderstorm warning Severe weather terminology (United States) References External links What causes thundersnow? Research on Convective Snow from University of Missouri Thundersnow caught on live BBC TV broadcast – 1st Feb 2009 – Kent, United Kingdom Snow or ice weather phenomena Storm Weather hazards Weather warnings and advisories