There could be a 6-12 inch snowfall in Indiana Sunday, followed by about 48 hours of temperatures below zero. The snow would start early in the morning and go until late in the evening, with the heaviest snow falling in the afternoon.
(For my Michiana listeners: 4-8 inches is possible, although you may catch up with a few subsequent days of Lake Effect snow.)
This will be immediately followed by the coldest air in a couple of decades, at least for Indianapolis specifically. Temps will fall below zero Monday morning and stay there until Wednesday afternoon. Monday night lows will be in the negative mid-teens. Wind chills be from 30-35 below. Single digit low temps will sink as far south as Memphis and Nashville Tennessee.
The forecast can definitely change, especially with respect to snow totals, but accumulating snow followed by sub-zero temps look to be fairly certain now for Sunday-Wednesday.
So how much bread do you buy for this?
