For anyone who doubts the achievements of modern technology, here is an item from the Washington Post blog (Clarence Williams) with a roundup of today's snowball fights in Washington (and one in Baltimore). 

The names are wonderful--Battle Snowpocalypse (Ellipse 12-3 PM),  Snowpocalypse Celebration (Ft. Dupont Park in Southeast 12-2 PM), The Official Dupont Circle Snowball Flight (2 PM), Columbia Heights Snowball Fight (Malcolm X Park 2 - 5 PM), and, in Baltimore, Snowsaycanyousee Part 2: Fells Point! (Fells Point - Broadway between Thames & Lancaster Streets)

Bundle up.