Texas and Oklahoma are bracing for ice and heavy snow in what forecasters predict will be some of the initial major effects of a huge winter storm. The forecasted days-long event threatens catastrophic damage, extensive power outages and bitterly cold weather in the eastern two-thirds of the U.S. Forecasters warn the storm could rival a hurricane in damage to power lines and trees, especially in areas with heavy ice. The storm is expected to start Friday in New Mexico, Texas and Oklahoma, moving east through the South and then up the coast into New England. Bitterly cold air could follow, with wind chills dropping to minus 50 degrees Fahrenheit in parts of Minnesota and North Dakota.