By Steve Gorman (Reuters) – Winter storms and biting cold that have gripped much of the United States in recent days with deadly consequences are expected to persist through this weekend, the National Weather Service (NWS) reported on Saturday. Even as frigid temperatures were forecast across two-thirds of the country for the days ahead, along with snow, freezing rain and heavy showers, CBS News said it has tallied 83 confirmed weather-related U.S. fatalities over the past week. Tennessee accounted for 19 lost lives attributed to severe weather, and Oregon 16 more, CBS reported, including thre…