Next 7 days or so look quiet,GFS and Euro both bringing down an arctic front around day 8/9.Euro runs a big storm up the front,GFS just a frontal passage but the air behind looks plenty cold.
Afterwards you're just watching for shortwaves to interact with the cold air,both models have something but impossible to pin down this far out.Also when I see the 582-585dm pushing all the way up into Oregon/Washington I start watching. Eyes open.