While some areas of the country have left winter behind and crossed into record-high temperatures, fast-moving weather systems are bringing more cold from the Midwest to the Northeast. Snow is set to break out this weekend in the Midwest, then move across the country to Washington, D.C., and New York City by Monday. Snowfall, however, won't resemble last weekend's blizzard, which hit the Northeast with more than 2 feet of snow in many places and left more than 600,000 customers without power. Massachusetts experienced the most power outages in the country, with the state's south coast and Cape Cod particularly hit hard. As of Friday, nearly half a million outages had been restored in Massachusetts since the start of the nor'easter. Now, some areas of the Midwest and the Pacific Northwest are under winter weather-related advisories. Southwest Phillips County in Montana is the only area under a winter storm warning from this morning to tomorrow.…