that is creating life-threatening weather across this country. this is kansas city right now, whiteout conditions hammering the city at this hour, roughly a third of the u.s. population is under a winter wind chill or freeze alert with temperatures plummeting as much as 50 degrees in the last 24 hours. joining us now is kelly sear. she is the warning coordination meteorologist for the national weather service and she joining us now from south dakota where she wins. temperatures are hovering around a negative 40 to 50 degrees. the airports have closed. can you describe what negative 40 and 50 degrees, a wind chill like that even feels like? it s rough, it s what it is. you get all bundled up and put your hat and gloves on and you