Holiday travel "difficult to impossible" as blizzard conditions, freezing rain hit the Plains

A major Christmas winter storm that has already brought heavy snowfall and freezing rain to the central U.S. is expected to continue impacting travel, according to forecasts. 
Another four to six inches of snow is expected over the western High Plains on Tuesday, the National Weather Service said in an update early Tuesday.
"The combination of either falling snow or snow on the ground with strong winds will lead to areas of blowing snow and near-blizzard conditions this morning," NWS said. "Travel may be difficult to near impossible due to snow-covered roads and whiteout conditions.