Snow on Christmas Eve

Although the forecast models still aren't in the best agreement as to what's going to happen with our Christmas Eve snow, here's a brief overview of what looks to be headed our way. The main area of low pressure associated with this Midwest snowfall will probably track along the Missouri/Arkansas border, which is too far to the south to give us a major snowfall. However, an upper-level disturbance (in this case, what meteorologists call a vorticity maximum or vort-max) will dive southward through the upper-Mississippi valley as this low is moving through and extend the northward boundary of this snowfall into our region. The timing looks a bit later than I was thinking yesterday (the onset of the snow will probably be delayed until late Friday morning), and amounts will probably total 1-3".