perhaps a day or so prior to a storm, they start canceling large numbers of flight so is they can gets the airplanes and the crews where they need to be and that way there isn't any surprises when the weather hits. that also allows passengers to make other plans and take care of their travel, a. -- arrangements before they get to the airport. it used to be you showed up at the airport and find out your flight is cancelled. now you can find out the day before. >> a step in the right direction but a lot of people spending the night at airways. thank you, dan. >> the cold snap, smashing all kinds of records in wisconsin. minus 18 in green bay. we're not even talking with wind chills. to meteorologist janice dean on how long the deep freeze is going to last. >> we have another mass of arctic air moving in and bringing us even colder temperatures. this could be historic cold.