here's meteorologist tom sater. >> martin, when will it end? everyone wants to know that.y you get frostbite in five minutes. exposed skin in five minutes for this entire area. the brunt of this is going to be monday into tuesday. obviously it'll stick around for the northern tier states, but when you have temperatures like this you want to know when can we go back to life? schools open again? businesses back to what they need to do? we'll see the effects hang around into tuesday afternoon, maybe wednesday morning in the deep south. but let's break this down because it's really critical to find out what we're going to be finding here. notice the temperatures in the departure from normal when you look at a high of 11 below in duluth and minus 32. that's the departure from normal. we will get back to normal, it's going to take awhile. minneapolis your average high is 24. you'll see 26 on friday. 29 this weekend. it'll be balmy again come this weekend. but as we get down into the midwest, notice the departure from normal. nashville, a 42-degree drop from what a average for yo