The Arctic air masses, like the one currently over the region and will get reinforced in the coming days from a meteorological perspective are always fascinating to watch. I like to think of arctic air being so cold and in turn dense somewhat acting like corn syrup. It tends to move slowly with different locations seeing very different temperatures. In some instances, temperatures fluctuated by 10 or more degrees in relatively short distances. Some of those differences can be attributed to topography as low spots are often several degrees colder, but also, land use differences and snow cover all can make a difference of several degrees over short distances.