Transcript for More Than 300 Volunteers Search for Lost Tennessee Toddler in Brutal Cold
Tonight, our weather team is following a major storm brewing that could bring more than a foot of snow by the end of the week. Here is one of the possible tracks. Major cities including Washington, D.C., philly, new York, Boston, all bracing for a possible hit. Rob has much more on that in a moment. But first booeshgs in the middle of a deep freeze from the south to the mid-atlantic to the northeast, and in one Tennessee town, it is hampering the search for one toddler, now missing for days. Here's ABC's Linzie Janis. Reporter: Tonight, hundreds of searchers braving brutal cold, combing the woods for any sign of 2-year-old Noah Chamberlin, now missing for a sixth day in rugged terrain west of Nashville. People have just been praying that this child will miraculously be okay. Reporter: The toddler vanished on Thursday afternoon while on a hiking trip with his grandmother. Conditions so cold, authorities only allowing people to search for an hour at a time. Officials say the search will go on, but there's snow and sleet on the way. That snow already hitting Omaha, Nebraska, making striving near impossible. Meanwhile, two-thirds of the country tonight shivering in bone-chilling cold. This morning in Chicago, it was 2 below and felt like negative 13. At those temperatures, frostbite can set on exposed skin in just 30 minutes. David, tonight, drivers behind me face a chilly commute home, but it could turn into a very snowy commute later on this week, with a major snowstorm in the forecast. David? So, let's get to that storm. Linzie, thank you. And rob Mars yab kciano is here. Reporter: Let's talk about the storm that's going to hit Tennessee, with winter weather, winter storm warnings posted for the Ohio and Mississippi river confluence there with six to eight inches potentially. But a slick go from St. Louis to Nashville. Now, to that storm that is plowing through the west. A lot of energy with it. It's going to get over the rockies and by Thursday, it's overlouisiana. Taps moisture from the gulf of Mexico. It moves north into colder air, here is one of the possible tracks. Hits the atlantic on Saturday morning. I think the heaviest snow looks to be Baltimore, D.C., back through the Carolinas. Over a foot of snow there, but it is early in the game. Boston and New York still in play. The tracks can always shift. Rob, thank you.
This transcript has been automatically generated and may not be 100% accurate.