People jog on the sidewalk during a snow day, Sunday, April 14
Winter storms slam US could bring historic snowfall
Storm brings heavy snow, strong winds to southern North Dakota
Winter Storm Brings Snow, Frigid Temperatures, High Winds To Chicago
PHOTOS: Massive winter storm brings frigid temps, snow and ice to
South Bend area prepares for winter rain and heavy snow
Polar vortex: 12 dead as US weather system brings record low
Polar Vortex' Brings Extreme Cold To United States
Cold blast, cross-country storm hit both coasts - ABC News