the easiest way to get snow is to have the mean trough in the east lol. The easiest way to have that is a having a ridge in the west. How do we keep a ridge in the west? Seems like we need to start having PDO winters that are positive. https://www.ncei.noaa.gov/pub/data/cmb/ersst/v5/index/ersst.v5.pdo.dat
the PDO has been very negative for a long time. We need to shift our SSTs out west --not sure how that happens? Nino?