LOWVILLE, N.Y. — Heavy snowfall and numbing temperatures kept parts of the U.S. in a deep freeze Sunday as the Thanksgiving holiday weekend draws to a close. Despite the Arctic-type weather, however, snowmobilers and skiers are reveling in their respective wintry terrains, and weather forecasters gave possible good news ahead of the NFL game in Buffalo. In the remote Tug Hill region of upstate New York, where lake-effect snow off Lake Ontario can dump several feet of snow at a time, there was up to 46 inches (117 centimeters) in the Barnes Corners area. [time-brightcove not-tgx=”true”] “We just keep digging out,” Kevin Tyo, a local businessman, said Sunday.