Normally quiet and reserved WeatherBell senior forecaster Joe D'Aleo (co-founder of the Weather Channel with John Coleman) almost never writes (email subject lines) like this. When he does, it gets my attention. A new forecast shows the cold blast in the eastern half of the USA extending well past Groundhog Day, Feb 2nd, according to their models. WeatherBell has had an excellent track record this winter so far. He says he hasn't seen anything like it since 1918 when the big flu pandemic hit the USA. Have a look:

D'Aleo writes in a follow up email about the forecast graphic below.
This is the GFS model depiction of the mean anomaly (in degrees C) for the 16 day period through 12z on February 6th. It covers the coldest period of the winter season climatologically in most areas. The other global models agree through at least 10 days. This is the most severe run thus far. We have been alerting clients to it for weeks. Here is the day by day anomaly for the mean of the GFS ensemble runs which agree on the steadiness and generally the severity of the cold.