Right now the trend in the models is to amass the coldest air in the NH in Siberia, leaving most of our side of the globe quite warm. I will feel better about the chances of cold air down the road (probably after Christmas) if we see Alaska turn cold again towards mid December.
One thing we definitely don't want to see is a really warm December in Alaska. Historically, that's led to nothing good for the PNW during Ninos. Take a look at the list of +ENSO years with +7 or warmer December anomalies at Fairbanks. It's a who's-who of non frozen turd fests.