A significant snow event, or two, is on the way. Month to date, Flagstaff has received more than double the average snowfall. The snowy winter of 2016-2017 will continue until everyone needs new skis for next year.
The timing for this next storm is pretty clear. Snow will start Thursday and continue through Sunday. As you can see below, the accumulation by Sunday could easily be 12 or more inches for Flagstaff. Much more is possible.
But, that is only chapter 1. By the following Wednesday morning, current models have a second cut-off low moving through Northern Arizona, at least doubling the snow on the ground. There will be little break from cold temperatures during this time. Be ready to figure out where to store the snow!