by Huw GRIFFITH Agence France-Presse LOS ANGELES , United States (AFP) — Powerful winter storms lashed the United States on Wednesday, with heavy snow snarling travel across wide areas, even as unusual warmth was expected in others. Blizzards expected to dump up to two feet (60 centimeters) of snow swept across a vast band of the country from the West Coast to the Great Lakes, grounding flights and knocking out power to tens of thousands. […]