cross-country weather threats. tens of millions in the path of a dangerous storm, from the midwest of the south, with so-called gorilla hail and tornadoes. plus, heavy snow in colorado leaves people stranded. i was crying all day yesterday because i wanted to be home. and i can t. norah: the cbs evening news starts now. good evening. i m norah o donnell, and thank you for being with us. we begin tonight with more than 40 million americans under threat from two major storm systems. heavy snow is falling across the rockies, with 3 feet already on the ground in parts of colorado, causing travel nightmares at the airports and on the roads. hundreds of flights at denver international airport were canceled today and more severe and dangerous weather is sweeping across the middle of the country today, with several tornadoes touching down in kentucky and indiana. this funnel cloud was spotted over a small town in kentucky. communities are surveying the aftermath with downed