New information is coming in on the cold outbreak set to roll in during the middle of January.
The cold will first settle southward over the West during the latter part of this week into the weekend. Portions of California may experience their lowest temperatures of the season so far. Temperatures are likely to slowly moderate next week in the West.
Farther east, arctic air will spill into the northern Plains this weekend from central Canada and will progress southeastward in stages through next week.