The National Weather Service issued an ice storm warning for much of the western half of Oklahoma and parts of north central Texas. It is the area in purple in the map below. I am forecasting significant icing in
the southern Flint Hills counties in Kansas.
The pink areas on the map are under a winter storm warning. The blue areas are under a winter weather advisory (a lesser condition).
Below is the Sperry-Piltz Ice Accumulation Index:
Below is a guide to the colors.
It is important to emphasize the conditions outlined above may be conservative because trees are still leafed out.