A rare weather phenomenon rumbled across several eastern and central U.S. states this weekend as Arctic air continues to bring heavy snow and freezing temperatures to millions of Americans.

What conditions are needed to form Thundersnow? Learn what those conditions are, how often wind shears occur, and some weather safety knowledge from Meteorologist Rich Segal on this Sunday's First ...

Heavy snow has blanketed several northern states creating dangerous conditions. Watch the most dramatic scenes from the first major snowfall of the season. Runaway kangaroo 'Sheila' shut down part ...