A one-two punch of dangerously frigid temperatures and gusty winds will wallop parts of the Northeast and Midwest on Friday and Saturday after a major storm left piles of snow and thousands of power outages along the East Coast. Millions in these regions will bundle up against temperatures in the single digits and teens during the day and near or below zero at night. Wind chills will make it feel far colder: as low as 20 to 40 degrees below zero in parts of the Northeast. The brutal cold comes after a blizzard dumped more than a foot of snow across eight states, knocking out power for tens of thousands and deluging streets in Massachusetts with icy water.