tuesday and wednesday of the upcoming week. it's going to be vel cold. we are not talking 10 degrees or degrees below average. all of these dots represent record cold temperatures 250 from monday to wednesday. it begs the question it's november. where is this old air coming from? because this isn't normally a time of year you would get such cold air pushing down. well, here is the thing. it all originates far to the north. you can see that temperature trend pushing that cold air. initially down into the midwest. then into the northeast. the mid atlantic. eventually down into the southeast to a place like nashville, for example. but here is the thing. this is the really cool part, martin and christi. the air in nashville later this week originated back in the northern portion of the northwest territories in canada. yes, the arctic circle just a few days ago. >> wow. >> she meant that. really cool. >> she did. i got it. thank you. >> allison, thank you.