You need to look at the NOAA forecast. I kind of trust NOAA over all the others. Mountain-forecast has always over-estimated the snowfall. ...Of course they could be right once in a while.
The snowfall will be light. Even if there's almost a foot, you can tramp through it and pack it down. That will slow people way down, though. Microspikes might come in handy. But the trail will still be navigable, if the cold doesn't convince you to turn back.
