This study is conducted to evaluate if the impact of Eurasian snow cover on North Pacific climate identified in modeling simulations is evident in nature. It is shown that anomalies in east Asian snow cover have a distinct lack of persistence, indicating that understanding the effects of east Asian snow cover on circulation is more germane for short-to-medium range weather forecasting applications than for problems on longer timescales. Examination of the effect of east Asian snow cover variations on atmospheric circulation is conducted through a series of composites, constructed separatly for positive and negative snow cover anomalies during November-December (ND), January-February (JF), and March-April (MA). Composites of the 850 hPa air temperature anomalies and the 300 hPa zonal wind fields show more extensive snow cover is associated with below-normal air temperatures over the transient snow regions in east Asia and an increase in the strength and eastward extension on the east Asian jet. These signals are associated with an amplification of the 500 hPa PNA wave train over North America (most apparent in JF) and a deepening of the Aleutian Low. The stronger amplification of the PNA wave train in JF is initially explained as the eastward extended jet in mid-winter shifts the region of highest cyclonic shear into the central Pacific, thus having a stronger influence on the wave train over North America than in ND and MA. Composites of high frequency eddy activity and the associated barotropic forcing by the vorticity flux convergence show the eddies induce a stronger cyclonic forcing of the mean flow in positive snow cover extremes. In mid-winter, the eddy activity and associated cyclonic forcing is shifted east, further reinforcing the circulation anomalies over North America