A massive winter storm is roaring across the West in parts of Nevada and Idaho, fueled blizzard warnings in six other states and spawned tornadoes in the South. More than 25 million Americans were under dangerous weather watches and warnings Tuesday. The storm's march across the nation could last through the weekend, when parts of the northeast could be blasted with more than a foot of snow, forecasters warned. 📸 @apnews #weather #snow #winter #blizzard