Over the next 2 weeks the weather pattern across North America is turning very cold. The long term indices are pointing to a colder pattern thanks to a suddenly strongly negative East Pacific Oscillation that is forecast to be negative at least through mid month. The weather models themselves have been so highly volatile lately. However it seems that over the last 4 or 5 days the colder look is there on all three major models.
I put the Jet stream map above and the 5000 ft temperature anomaly underneath so you can see what the result will be at ground level. Notice how the flow from Canada has turned temperatures well below normal everywhere east of the Rockies and through most of Canada. The second cold blast will come for the middle of next week as the polar vortex strengthens and drops southward...READ MORE AT http://www.meteorologistjoecioffi.com/index.php/2016/12/07/wintry-weather-pattern-next-2-weeks/