The coldest and most persistent outbreak of Arctic air in a couple of years will have the intensity and staying power to trigger feet of lake-effect snow and whiteouts in some areas of the Upper Midwest and the interior Northeast, AccuWeather meteorologists warn. However, there is the risk of a ground-covering snow squall reaching as far as coastal areas of the Northeast. In the wake of a massive storm that affected more than 200 million people in the central and eastern United States with snow,