Heavy mountain snows for the Northwest/Rockies......Bands of heavy lake-effect snow continue for the Great Lakes throughThursday with hazardous snow across the Midwest and Mid-Atlantic intoFriday......Another Arctic blast expected late this week...A storm system moving into the Pacific Northwest this afternoon willcontinue to spread heavy mountain snows across the Cascades and into theNorthern/Central Rockies tonight and into Thursday, with moderate to majorwinter storm impacts expected owing...