However a major adjustment to the jet stream pattern across the Pacific Ocean is expected to lead to even colder temperatures by next week.
The following 500 mb charts graphically illustrate the expected change.
|Noon Dec 25 2014|
|Noon Dec 27 2014|
By Tuesday night bitter cold has engulfed all of Wyoming and surrounding states
As of now it appears that by Wednesday morning if not before the mercury will dip to 10 to 20 below zero in many areas of western Wyoming and possibly 30 below in the typically coldest locations.