After the mild winter we just suffered through, when forecasters were mostly in agreement on a brutal winter 2011-2012, a warm winter was caused by the lack of a Greenland blocking high pressure, a positive arctic oscillation, an abnormally cold Stratosphere and many other exceptional issues.
So far forecasts are showing cold and snow in the Midwest and Northeast:
http://www.farmersalmanac.com/forum/2012/07/23/new-official-2012-2013-united-states-winter-forecast/
http://theweathercentre.blogspot.com/2012/09/official-2012-2013-winter-forecast_8.html
Snowmaggedon possible: USA’s second-oldest almanac predicting heavy snowstorms winter 2012-2013 in mid-Atlantic region:
http://www.fredericknewspost.com/sections/news/display.htm?storyID=140288#.UEi64OVmyoY
http://snowday1.wordpress.com/2012/09/16/winter-forecast-2012-2013/
And in case you are skeptical after last winter, when all the worlds weathermen and computers failed miserably, here is a forecast from a 16 year old kid. It’s a super cold & snowy winter for northeastern USA. Very, very similar to the 1977 winter where Carter called out the national guard and shut down most of the government for a week. You know things are getting interesting when a 16 year old weatherman drops a super cold & snowy bombshell forecast, with graphics, for the eastern USA winter 2012-2013: