The northern Indiana office of the National Weather Service sent an email message to emergency managers in its forecast area this afternoon that included a map (above) showing a very preliminary snow accumulation forecast for the coming winter storm.

The NWS wrote:

• Rain is expected to change to snow from west to east across the area Wednesday evening.
• Snow accumulations of one to three inches along with slick roads are possible from this system.
• Confidence in the snow accumulation forecast is low at this time, but since the snowfall could impact the busy Christmas Eve traveling period, the NWS wanted to make sure emergency managers are aware of the potential.