MINNEAPOLIS (AP) — A monster winter storm is taking aim at the Upper Midwest, threatening to bring blizzard conditions, bitterly cold temperatures and 2 feet of snow in a three-day onslaught that could affect more than 40 million Americans. The storm was to begin around midday and continue through Thursday morning, dumping heavy snow over parts of the Dakotas, Nebraska, Minnesota, Iowa and Wisconsin. The system was headed straight for the Minneapolis-St. Paul area, where 2 feet of snow or more was possible. More than a foot of snow was expected in Sioux Falls, South Dakota.