You can check, for example, this blog post to see US maps for the winters of 1975-76 and 2000-01. You can see notable differences between the two winters - for example, 1975-76 was warmer than average whereas 2000-01 was cooler than average over the US. We also see big differences in the precipitation over the Pacific Northwest (1975-76 wet, 2000-01 dry). The bottom line is that chaotic weather variability likely factored into those winters, as with all winters, and there's no clear signal for anything distinct from the typical La Nina influences. 

If you would like to check out other variables, seasons, or regions, I recommend using this site to construct your own maps.