 80 million Americans on alert for severe weather. The system from Kentucky up through Pittsburgh, Scranton, right up through upstate New York and New England. Again, those major cities, D.C., Philadelphia, New York City, right up through New Massachusetts. Tonight, at least 11 reported tornadoes in Nebraska and Iowa. This one near Cedar Rapids. Heavy rain and damaging winds up to 85 miles an hour slamming Oklahoma City. Let's get right to Chief Meteorologist Ginger Zee tracking it all for us tonight. Hi, Ginger.