Mean SNOW on extreme negative (low) NAM days

Mean SNOW on days of extreme negative NAM   PNG: (1200x900) | (640x480) Open PNG in new window: (1200x900) | (640x480)

Compare to all days mean SNOW   PNG: (1200x900) | (640x480) Open PNG in new window: (1200x900) | (640x480)

Difference when also extreme positive PNA PNG (1200x900) (640x480) Open in new window (1200x900) (640x480)	Difference when also extreme negative PNA PNG (1200x900) (640x480) Open in new window (1200x900) (640x480)	Difference when also extreme positive CTI PNG (1200x900) (640x480) Open in new window (1200x900) (640x480)	Difference when also extreme negative CTI PNG (1200x900) (640x480) Open in new window (1200x900) (640x480)