The month of December begins the climatological winter (Dec-Feb) and it will arrive in true fashion for many this year.
A large and very cold storm system is moving into the northern Rockies and the High Plains states today. Along with it will come snow and some of the coldest temperatures seen so far this year.
Here in Denver, we're expecting highs to barely reach 20 degrees on Thursday with widespread snow overnight tonight and most of the day tomorrow.
Overnight lows will drop to near zero in many places from eastern Colorado to northern Minnesota.
The cold air will moderate somewhat before reaching the south, so if you live in Memphis, you probably won't see more snow.
The mid-south saw a very rare November snow this week with 1 to 3 inches falling across northeast Arkansas, western Tennessee and northern Mississippi.
It has been 15 to 25 years since that much snow fell so early in the season.
Here is a link to some of the data from the recent snow event.