for the day on friday. a large swath of population density across the southeast including atlanta all the way to the areas hit hardest by tornadoes earlier this week. this is where the greatest chance of strong tornadoes exist. we're going to keep a close eye to the sky. on top of that, the coldest air of the season and the coldest a air in years for many locations expected to spill in behind this cold front. it is likely in chicago we will not reach 0 degrees for the potential of couple days. >> and what's right underneath that ark tuck air, iowa. and the caucuses. where it is set to be at this hour of the day negative 20 degrees on monday, where i will be hopefully inside and not outside, but we shall see. van dam, thank you. just ahead, chris christie. drops out of the race, but not before dropping this about nikki haley on a hot mic. >> she's going to get smoked.