I'll be sleeping very lightly with my radar handy on my phone and this forum open. Looks like timeline is between 1 and 4 am for the change from liquid to frozen, then the million dollar question is when the frozen turns to flakes. I've seen some models have it as early as 5am and of course we have the rgem that really never changes over to all snow until evening.
If it's snowing at 6am, we'll be in very good shape.